/r/Arithmancy

Photograph via snooOG

Welcome to the Harry Potter puzzle subreddit where the students of Hogwarts are asked to work with their houses to decipher clues in order to practice their Arithmancy and curse-breaking skills!

The puzzles will be posted on r/Arithmancy and a link to the puzzle will be posted on Discord.

We are now part of the r/HarryPotter community and we will be awarding House Points to the best solvers!

Check the latest announcement thread for more details and info on how to join your house!

Welcome to r/Arithmancy, the main hub for the new themed puzzles to be run for r/HarryPotter.


Would you like to be tagged when a puzzle is posted? Fill out this form.


Same rules apply as the main sub:

  • Don't be a jerk
  • No modern politics
  • No piracy
  • No pornography
  • Respect users' privacy
  • No monetary exchanges
  • No ticket sales
  • Follow reddit's rules and "reddiquette"

Some new ones will be added for the sake of keeping the integrity of the game:

  • Do not post clues or hints for others
  • No collusion or collaboration with other groups/houses

Please report anyone who breaks any of these rules.


Current schedule

See the stickied announcement thread.


Links

Puzzle Updates Spreadsheet and Current Points Tally

Submission Form

Sign up / Opt out of Reddit Notifications

Official Puzzle Guide


Arithmancy Google Calendar

Add to Your Calendar

 

View the events


Join the Arithmancy Discord Server

The puzzle-solving happens mainly on Discord. Here are links to the posts containing house invite links (you will need access to the common room to view them*):

Ravenclaw: https://redd.it/b9k21w
Gryffindor: https://redd.it/egyyk0
Hufflepuff: https://redd.it/i97dm3
Slytherin: https://redd.it/b9ri5d

*If you would like to join your house’s common room, check here for instructions.

/r/Arithmancy

1,358 Subscribers

1

May Announcements

Welcome back for the fifty-third month of r/Arithmancy! For those of you who are new, welcome to the Harry Potter puzzle subreddit where the students of Hogwarts are asked to work with their houses to decipher clues in order to practice their Arithmancy and curse-breaking skills.

Fill out this form if you would like to sign up for notifications when new puzzles or announcements are posted.

Puzzle Creators Wanted!

Are you interested in creating puzzles, but you don’t want to commit to joining the Arithmancy Professors? Check out our Prefect FAQs our Prefect Guide or our new Prefect Schedule!

Instructions for how to submit your puzzle can be found in the #links-and-resources channel on Discord.

If we choose your puzzle to use, you will be given a special Prefect role in Discord that allows you to talk to the professors while your puzzle is being solved, and to prevent you from helping your House during the puzzle. This is an awesome opportunity to test out being an Artificer without committing, too.

Feedback

We would like to hear your feedback about r/Arithmancy and your suggestions for making it better. Share your thoughts about the types and difficulty of puzzles, the hints system, the points system or anything else you think of below! What did you like about last month's puzzles? What did you dislike? Do you think changes should be made to make it more fun or fair for all houses? Comment below or use our anonymous feedback form.


May Schedule

The theme this month is: HP GoF!

Each level will last 48 hours and there will be a break between each level. The puzzles will be posted on r/Arithmancy and a link to the puzzle will be posted on Discord. The fourth puzzle each month is balanced for beginners, and isn’t worth points.

Hints will be given in the private channels on Discord upon request. Tag @hint if your house is stuck and needs a hint to proceed. All hint requests will be logged in the #room-of-requirehint channel on Discord.

There will be 4 levels this month:*

PuzzleStart TimeDeadline
Puzzle 1Tuesday, May 7, 2 PM EDTThursday, May 9, 2 PM EDT
Puzzle 2Monday, May 13, 8 PM EDTWednesday, May 15, 8 PM EDT
Puzzle 3Monday, May 20, 2 AM EDTWednesday, May 22, 2 AM EDT
Puzzle 4Sunday, May 26, 8 AM EDTTuesday, May 28, 8 AM EDT

*Schedule is subject to change.


How to participate

Puzzles should only be discussed in your house's Arithmancy Discord channel* and your house common room. If you would like to join your house’s common room, check here for instructions.

Links to the Reddit threads with your house’s Discord invite link: Gryffindor, Hufflepuff, Ravenclaw, Slytherin (Note that you can only open these if you are a part of your house’s common room.)

A link to the submission form will be included with each puzzle posted. Each student may submit only ONE guess per level and may have only one Reddit account used for participating. You may only submit for your own house.

If you are caught breaking these rules, you will be removed from the game.

##Points

Here is the entirety of the points calculations as they stand:

Points will be awarded based on the speed of each house to solve each puzzle, and based on the number of hints they use to solve it. All 5 hints will be available for the duration of each puzzle, and for each hint they request, the hint bonus will be decreased accordingly:

  • 0 hints - 40 point bonus
  • 1 hint - 38 points
  • 2 hints - 35 points
  • 3 hints - 31 points
  • 4 hints - 26 points
  • 5 hints - 20 points

Houses will also be awarded a number of points based on how quickly they solve their puzzle as follows: an inverted sigmoid function, 5 / ( 1 + e^(10x/a-5) ) where a is the amount of time it took for the last house to solve the puzzle, will be used to calculate the bonus each house gets for their speed, relative to the speed of the other houses that solved. Here's a link to an interactive graph on Desmos, where you can see the resulting curve. This bonus has a maximum of 5 points.

There will also be a tiebreaker added to every score based on the order of who solves first. First place will earn 4 points, second: 3, third: 2, and fourth: 1 point.

Each house’s score will be calculated using Hint Bonus + Speed Bonus + Tiebreaker = Final Score

House points will be awarded at the end of the month, based on how many Arithmancy Points each house earned in total. House point calculations are based on the new proposal in HP Meta.

2 Comments
2024/05/03
23:38 UTC

1

Puzzle 3 Results - April 22, 2024

Puzzle 3 Results

Link to puzzle: https://redd.it/1c8goww

Link to puzzle feedback form: https://forms.gle/bpy44CMZ2ca3z4wy6

Current Points for April

LevelGryffindorHufflepuffRavenclawSlytherin
Puzzle 100440
Puzzle 246494841
Puzzle 3042430
Arithmancy Points469113541

Level Results

Speed bonus and Tiebreaker:

First - Hufflepuff - u/pezes (Solved in 19 hrs, 23 min) - 0 + 4 = 4 points

Second - Ravenclaw - u/su-yun (Solved in 20 hrs, 19 min) - 0 + 3 = 3 points

Guesses from each house:

Hufflepuff - 2 Correct, 0 Incorrect

Ravenclaw - 2 Correct, 0 Incorrect

Hint Bonus:

Hufflepuff - 1 hint - 38 points

Ravenclaw - 0 hints - 40 points

Solution

The answer was: >!Ron Weasley!<

Solution: Part 1 and 2: >!Solutions for parts 1 and 2 can be found here

Part 3: >!There are 7 columns, hinting at the seven days of the week. Sorting the dates by days of the week, oldest to most recent, the letters next to them will line up to read “fourteen inch willow unicorn hair who own“, which was Ron's second wand.!<

Countdown to Puzzle 4

Note: “Arithmancy Points” are not the same as House Points. House Points will be awarded at the end of the month based on the combined total of “Arithmancy Points” earned.

1 Comment
2024/04/22
13:44 UTC

1

Level Three- April 20, 2024

Level Three

“Setting dementors around a school,” she muttered, pushing back Harry’s hair and feeling his forehead. “He won’t be the last one who collapses. Yes, he’s all clammy. Terrible things, they are, and the effect they have on people who are already delicate —”

“I’m not delicate!” said Harry crossly.

Good luck and remember that the theme this month is HP and the PoA!


Hints will be given in the private channels on Discord upon request. Tag @hint if your house is stuck and needs a hint to proceed. All hint requests will be logged in the #room-of-requirehint channel on Discord. Using hints will decrease your house’s hint bonus.

Work with your house to solve this puzzle. Puzzles should only be discussed in your house's Arithmancy Discord channel.

Links to the Reddit threads with your house’s Discord invite link: Gryffindor, Hufflepuff, Ravenclaw, Slytherin. (Note that you can only open these if you are a part of your house’s common room.*)

* If you would like to join your house’s common room, check here for instructions.

All students may participate even if you have not yet joined a common room. If a discussion has not yet been started in your common room, feel free to start one.

The answer will be a word or phrase. Submit your answer using this Google form. Each student may submit only ONE guess per level and may have only one Reddit account used for participating. You may only submit for your own house.

Every FIVE guesses, the current number of correct and incorrect guesses will be updated in this spreadsheet

The deadline is Monday, April 22, 12 AM ET

See the stickied announcements post for the full schedule and details on the scoring system.

2 Comments
2024/04/20
04:02 UTC

1

Puzzle 2 Results - April 15, 2024

Puzzle 2 Results

Link to puzzle: https://redd.it/1c3dfnf

Link to puzzle feedback form: https://forms.gle/bpy44CMZ2ca3z4wy6

Current Points for April

LevelGryffindorHufflepuffRavenclawSlytherin
Puzzle 100440
Puzzle 246494841
Arithmancy Points46499241

Level Results

Speed bonus and Tiebreaker:

First - Hufflepuff - u/quirkychipmunk (Solved in 0 hrs, 46 min) - 5 + 4 = 9 points

Second - Ravenclaw - u/ShadowOfApollo (Solved in 1 hr, 40 min) - 5 + 3 = 8 points

Third - Gryffindor - u/Usual-Arugula1317 (Solved in 5 hrs, 7 min) - 4 + 2 = 6 points

Fourth - Slytherin - u/Dissendium (Solved in 12 hrs, 51 min) - 0 + 1 = 1 point

Guesses from each house:

Hufflepuff - 2 Correct, 0 Incorrect

Ravenclaw - 2 Correct, 0 Incorrect

Gryffindor - 1 Correct, 0 Incorrect

Slytherin - 2 Correct, 0 Incorrect

Hint Bonus:

Hufflepuff - 0 hints - 40 points

Ravenclaw - 0 hints - 40 points

Gryffindor - 0 hints - 40 points

Slytherin - 0 hints - 40 points

Solution

The answer was: >!Dissendium!<

Solution: Part 1: >!Googling the two people referenced gives you Ismail Mahomed and Florence Ribeiro. Further investigation leads you towards street names. These two streets intersect with a University Rd before they merge together. In the space between the three roads there is a park named Magnolia Dell. The riddle points towards a beautiful arch, which could also be a Crescent. The street where Harry is picked up by the Knight Bus in PoA is MAGNOLIA CRESCENT!<

Part 2: >!This is a basic cryptogram. Solving it gives you “The tiniest speech bubble had appeared next to his figure. The word inside said“ leading to the answer of DISSENDIUM!<

Countdown to Puzzle 3

Note: “Arithmancy Points” are not the same as House Points. House Points will be awarded at the end of the month based on the combined total of “Arithmancy Points” earned.

1 Comment
2024/04/17
03:32 UTC

1

Level Two- April 13, 2024

Level Two

“Promise me, Harry,” said Mr. Weasley, talking more quickly still, “that whatever happens —”

“Why would I go looking for someone I know wants to kill me?” said Harry blankly.

“Swear to me that whatever you might hear —”

Good luck and remember that the theme this month is HP and the PoA!


Hints will be given in the private channels on Discord upon request. Tag @hint if your house is stuck and needs a hint to proceed. All hint requests will be logged in the #room-of-requirehint channel on Discord. Using hints will decrease your house’s hint bonus.

Work with your house to solve this puzzle. Puzzles should only be discussed in your house's Arithmancy Discord channel.

Links to the Reddit threads with your house’s Discord invite link: Gryffindor, Hufflepuff, Ravenclaw, Slytherin. (Note that you can only open these if you are a part of your house’s common room.*)

* If you would like to join your house’s common room, check here for instructions.

All students may participate even if you have not yet joined a common room. If a discussion has not yet been started in your common room, feel free to start one.

The answer will be a word or phrase. Submit your answer using this Google form. Each student may submit only ONE guess per level and may have only one Reddit account used for participating. You may only submit for your own house.

Every FIVE guesses, the current number of correct and incorrect guesses will be updated in this spreadsheet

The deadline is Monday, April 15, 6 PM ET

See the stickied announcements post for the full schedule and details on the scoring system.

2 Comments
2024/04/13
22:01 UTC

1

Puzzle 1 Results - April 9, 2024

Puzzle 1 Results

Link to puzzle: https://redd.it/1by7yux

Link to puzzle feedback form: https://forms.gle/bpy44CMZ2ca3z4wy6

Current Points for April

LevelGryffindorHufflepuffRavenclawSlytherin
Puzzle 100440
Arithmancy Points00440

Level Results

Speed bonus and Tiebreaker:

First - Ravenclaw - u/XanCanStand (Solved in 7 hrs, 2 min) - 0 + 4 = 4 points

Guesses from each house:

Ravenclaw - 3 Correct, 0 Incorrect

Hint Bonus:

Ravenclaw - 0 hints - 40 points

Solution

The answer was: >!Firebolt!<

Solution: Part 1: >!Morse code is hinted at by title and subtitle - Samuel Morse and di dah. The eighth notes (the shorter ones) are the dots and the dotted quarters/tied notes (the longer ones) are dashes. The notes that represent the dashes are three times as long as the ones that represent the dots (per the conventional lengths of morse). The notes translate to “Harry falls from his broom during a match against them“. This gives solution HUFFLEPUFF!<

Part 2: >!First step is to figure out the three letter words that go with each clue. Then, assigning each of those letters an order (i.e. 123) and using whatever order they are in the word to the right. for example BAD in BRIDGED gives 133. Then using that as triliteral cipher gives FIREBOLT!<

Countdown to Puzzle 2

Note: “Arithmancy Points” are not the same as House Points. House Points will be awarded at the end of the month based on the combined total of “Arithmancy Points” earned.

1 Comment
2024/04/09
22:59 UTC

1

Level One- April 7, 2024

Level One

There was a deafening BANG, and Harry threw up his hands to shield his eyes against a sudden blinding light —

Good luck and remember that the theme this month is HP and the PoA!


Hints will be given in the private channels on Discord upon request. Tag @hint if your house is stuck and needs a hint to proceed. All hint requests will be logged in the #room-of-requirehint channel on Discord. Using hints will decrease your house’s hint bonus.

Work with your house to solve this puzzle. Puzzles should only be discussed in your house's Arithmancy Discord channel.

Links to the Reddit threads with your house’s Discord invite link: Gryffindor, Hufflepuff, Ravenclaw, Slytherin. (Note that you can only open these if you are a part of your house’s common room.*)

* If you would like to join your house’s common room, check here for instructions.

All students may participate even if you have not yet joined a common room. If a discussion has not yet been started in your common room, feel free to start one.

The answer will be a word or phrase. Submit your answer using this Google form. Each student may submit only ONE guess per level and may have only one Reddit account used for participating. You may only submit for your own house.

Every FIVE guesses, the current number of correct and incorrect guesses will be updated in this spreadsheet

The deadline is Tuesday, April 9, 12 PM ET

See the stickied announcements post for the full schedule and details on the scoring system.

2 Comments
2024/04/07
16:02 UTC

1

Level One- April 7, 2024

Level One

There was a deafening BANG, and Harry threw up his hands to shield his eyes against a sudden blinding light —

Good luck and remember that the theme this month is HP and the PoA!


Hints will be given in the private channels on Discord upon request. Tag @hint if your house is stuck and needs a hint to proceed. All hint requests will be logged in the #room-of-requirehint channel on Discord. Using hints will decrease your house’s hint bonus.

Work with your house to solve this puzzle. Puzzles should only be discussed in your house's Arithmancy Discord channel.

Links to the Reddit threads with your house’s Discord invite link: Gryffindor, Hufflepuff, Ravenclaw, Slytherin. (Note that you can only open these if you are a part of your house’s common room.*)

* If you would like to join your house’s common room, check here for instructions.

All students may participate even if you have not yet joined a common room. If a discussion has not yet been started in your common room, feel free to start one.

The answer will be a word or phrase. Submit your answer using this Google form. Each student may submit only ONE guess per level and may have only one Reddit account used for participating. You may only submit for your own house.

Every FIVE guesses, the current number of correct and incorrect guesses will be updated in this spreadsheet

The deadline is Tuesday, April 9, 12 PM ET

See the stickied announcements post for the full schedule and details on the scoring system.

2 Comments
2024/04/07
16:02 UTC

1

April Announcements

Welcome back for the fifty-second month of r/Arithmancy! For those of you who are new, welcome to the Harry Potter puzzle subreddit where the students of Hogwarts are asked to work with their houses to decipher clues in order to practice their Arithmancy and curse-breaking skills.

Fill out this form if you would like to sign up for notifications when new puzzles or announcements are posted.

Puzzle Creators Wanted!

Are you interested in creating puzzles, but you don’t want to commit to joining the Arithmancy Professors? Check out our Prefect FAQs our Prefect Guide or our new Prefect Schedule!

Instructions for how to submit your puzzle can be found in the #links-and-resources channel on Discord.

If we choose your puzzle to use, you will be given a special Prefect role in Discord that allows you to talk to the professors while your puzzle is being solved, and to prevent you from helping your House during the puzzle. This is an awesome opportunity to test out being an Artificer without committing, too.

Feedback

We would like to hear your feedback about r/Arithmancy and your suggestions for making it better. Share your thoughts about the types and difficulty of puzzles, the hints system, the points system or anything else you think of below! What did you like about last month's puzzles? What did you dislike? Do you think changes should be made to make it more fun or fair for all houses? Comment below or use our anonymous feedback form.


April Schedule

The theme this month is: HP PoA!

Each level will last 48 hours and there will be a break between each level. The puzzles will be posted on r/Arithmancy and a link to the puzzle will be posted on Discord. The fourth puzzle each month is balanced for beginners, and isn’t worth points.

Hints will be given in the private channels on Discord upon request. Tag @hint if your house is stuck and needs a hint to proceed. All hint requests will be logged in the #room-of-requirehint channel on Discord.

There will be 4 levels this month:*

PuzzleStart TimeDeadline
Puzzle 1Sunday, April 7, 12 PM EDTTuesday, April 9, 12 PM EDT
Puzzle 2Saturday, April 13, 6 PM EDTMonday, April 15, 6 PM EDT
Puzzle 3Saturday, April 20, 12 AM EDTMonday, April 22, 12 AM EDT
Puzzle 4Friday, April 26, 6 AM EDTSunday, April 28, 6 AM EDT

*Schedule is subject to change.


How to participate

Puzzles should only be discussed in your house's Arithmancy Discord channel* and your house common room. If you would like to join your house’s common room, check here for instructions.

Links to the Reddit threads with your house’s Discord invite link: Gryffindor, Hufflepuff, Ravenclaw, Slytherin (Note that you can only open these if you are a part of your house’s common room.)

A link to the submission form will be included with each puzzle posted. Each student may submit only ONE guess per level and may have only one Reddit account used for participating. You may only submit for your own house.

If you are caught breaking these rules, you will be removed from the game.

##Points

Here is the entirety of the points calculations as they stand:

Points will be awarded based on the speed of each house to solve each puzzle, and based on the number of hints they use to solve it. All 5 hints will be available for the duration of each puzzle, and for each hint they request, the hint bonus will be decreased accordingly:

  • 0 hints - 40 point bonus
  • 1 hint - 38 points
  • 2 hints - 35 points
  • 3 hints - 31 points
  • 4 hints - 26 points
  • 5 hints - 20 points

Houses will also be awarded a number of points based on how quickly they solve their puzzle as follows: an inverted sigmoid function, 5 / ( 1 + e^(10x/a-5) ) where a is the amount of time it took for the last house to solve the puzzle, will be used to calculate the bonus each house gets for their speed, relative to the speed of the other houses that solved. Here's a link to an interactive graph on Desmos, where you can see the resulting curve. This bonus has a maximum of 5 points.

There will also be a tiebreaker added to every score based on the order of who solves first. First place will earn 4 points, second: 3, third: 2, and fourth: 1 point.

Each house’s score will be calculated using Hint Bonus + Speed Bonus + Tiebreaker = Final Score

House points will be awarded at the end of the month, based on how many Arithmancy Points each house earned in total. House point calculations are based on the new proposal in HP Meta.

2 Comments
2024/04/05
13:20 UTC

1

Puzzle 4 Results - February 26, 2024

Puzzle 4 Results

Link to puzzle: https://arithmancy.ueuo.com/mirror

Link to puzzle feedback form: https://forms.gle/bpy44CMZ2ca3z4wy6

Current Points for February

LevelGryffindorHufflepuffRavenclawSlytherin
Puzzle 10424649
Puzzle 248394940
Puzzle 332474937
Arithmancy Points80128144126

Level Results

Guesses from each house:

Ravenclaw - 1 Correct, 0 Incorrect

This level was a training puzzle and therefore was not worth any points.

Hints:

Ravenclaw - 0 hints

Solution

The answer was: >!Basilisk!<

Solution: Part 1: >!The first part is morse code. Green is dot and red is dash. I am Lord Voldemort anagram to Tom Marvolo Riddle!<

Part 2: >!Cryptogram crossword. Highlighted letters spell out HERMIONE!<


Note: “Arithmancy Points” are not the same as House Points. House Points will be awarded at the end of the month based on the combined total of “Arithmancy Points” earned.


House Points for February

HouseGryffindorHufflepuffRavenclawSlytherin
House Points136184200182
1 Comment
2024/02/28
15:49 UTC

1

Puzzle 3 Results - February 20, 2024

Puzzle 3 Results

Link to puzzle: https://redd.it/1aubnj7

Link to puzzle feedback form: https://forms.gle/bpy44CMZ2ca3z4wy6

Current Points for February

LevelGryffindorHufflepuffRavenclawSlytherin
Puzzle 10424649
Puzzle 248394940
Puzzle 332474937
Arithmancy Points80128144126

Level Results

Speed bonus and Tiebreaker:

First - Ravenclaw - u/stepsword (Solved in 6 hrs, 25 min) - 5 + 4 = 9 points

Second - Hufflepuff - u/quirkychipmunk (Solved in 15 hrs, 21 min) - 4 + 3 = 7 points

Third - Slytherin - u/Neeshky (Solved in 43 hrs, 54 min) - 0 + 2 = 2 points

Fourth - Gryffindor - u/Moonyandpadfoot (Solved in 45 hrs, 54 min) - 0 + 1 = 1 point

Guesses from each house:

Ravenclaw - 1 Correct, 0 Incorrect

Hufflepuff - 1 Correct, 0 Incorrect

Slytherin - 3 Correct, 0 Incorrect

Gryffindor - 1 Correct, 0 Incorrect

Hint Bonus:

Ravenclaw - 0 hints - 40 points

Hufflepuff - 0 hints - 40 points

Slytherin - 2 hints - 35 points

Gryffindor - 3 hints - 31 points

Solution

The answer was: >!Basilisk!<

Solution: Part 1: >!The flavour mentions weekdays, so use the dates to get the days of week, which gives book numbers (Monday is the first day of the week, I specify in the UK, which google said uses Monday due to using the ISO 8601 thingy for dates, times, etc.). Then temp is the chapter number. since you already used the date, it's not page, line, word. the bolded “very first“ means the first letter of the chapter name, which anagrams to mandrake!<

Part 2: >!The italics in the flavor hints to moving forward and backwards with numbers. The numbered clues lead you towards the numbers you need to add or subtract. Starting with the first number, alternate adding or subtracting the values from each previous clue. Then convert the numbers to A1Z26 to get the answer of BASILISK!<

Countdown to Puzzle 4

Note: “Arithmancy Points” are not the same as House Points. House Points will be awarded at the end of the month based on the combined total of “Arithmancy Points” earned.

1 Comment
2024/02/21
02:16 UTC

1

Level Three - February 18, 2024

Level Three

Madam Pomfrey was bending over a sixth-year girl with long, curly hair. Harry recognized her as the Ravenclaw they’d accidentally asked for directions to the Slytherin common room. And on the bed next to her was —

“Hermione!” Ron groaned.

Hermione lay utterly still, her eyes open and glassy.

“They were found near the library,” said Professor McGonagall. “I don’t suppose either of you can explain this? It was on the floor next to them. . . .”

She was holding up a small, circular mirror.

Harry and Ron shook their heads, both staring at Hermione.

Good luck and remember that the theme this month is HP and the CoS!


Hints will be given in the private channels on Discord upon request. Tag @hint if your house is stuck and needs a hint to proceed. All hint requests will be logged in the #room-of-requirehint channel on Discord. Using hints will decrease your house’s hint bonus.

Work with your house to solve this puzzle. Puzzles should only be discussed in your house's Arithmancy Discord channel.

Links to the Reddit threads with your house’s Discord invite link: Gryffindor, Hufflepuff, Ravenclaw, Slytherin. (Note that you can only open these if you are a part of your house’s common room.*)

* If you would like to join your house’s common room, check here for instructions.

All students may participate even if you have not yet joined a common room. If a discussion has not yet been started in your common room, feel free to start one.

The answer will be a word or phrase. Submit your answer using this Google form. Each student may submit only ONE guess per level and may have only one Reddit account used for participating. You may only submit for your own house.

Every FIVE guesses, the current number of correct and incorrect guesses will be updated in this spreadsheet

The deadline is Tuesday, February 20, 9 PM ET

See the stickied announcements post for the full schedule and details on the scoring system.

2 Comments
2024/02/19
02:00 UTC

1

Puzzle 2 Results - February 13, 2024

Puzzle 2 Results

Link to puzzle: https://redd.it/1aogzrf

Link to puzzle feedback form: https://forms.gle/bpy44CMZ2ca3z4wy6

Current Points for February

LevelGryffindorHufflepuffRavenclawSlytherin
Puzzle 10424649
Puzzle 248394940
Arithmancy Points48819589

Level Results

Speed bonus and Tiebreaker:

First - Ravenclaw - u/stepsword (Solved in 1 hr, 6 min) - 5 + 4 = 9 points

Second - Gryffindor - u/moonyandpadfoot (Solved in 4 hrs, 43 min) - 5 + 3 = 8 points

Third - Slytherin - u/Neeshky (Solved in 34 hrs, 57 min) - 0 + 2 = 2 points

Fourth - Hufflepuff - u/OoAnevor (Solved in 46 hrs, 58 min) - 0 + 1 = 1 point

Guesses from each house:

Ravenclaw - 1 Correct, 0 Incorrect

Gryffindor - 2 Correct, 0 Incorrect

Slytherin - 1 Correct, 0 Incorrect

Hufflepuff - 1 Correct, 0 Incorrect

Hint Bonus:

Ravenclaw - 0 hints - 40 points

Gryffindor - 0 hints - 40 points

Slytherin - 1 hint - 38 points

Hufflepuff - 1 hint - 38 points

Solution

The answer was: >!Pipes!<

Solution: Part 1: >!You have the Black family tree with a few missing members, and flavour hints at constellations. The missing family members are either constellations, or form part of constellations. Taking the constellation names and ordering them by the numbers provided, the initials give you “sad loo gal“, which is (Moaning) Myrtle.!< Part 2: >!solve the path finder word search. The last letter of the first word is the first letter of the second word, and so on. Use that path on the second grid to get a passage from the book, with one missing word which was “pipes“.!<

Countdown to Puzzle 3

Note: “Arithmancy Points” are not the same as House Points. House Points will be awarded at the end of the month based on the combined total of “Arithmancy Points” earned.

1 Comment
2024/02/16
21:09 UTC

1

Level Two - February 11, 2024

Level Two

Lockhart clapped his hands and through the doors to the entrance hall marched a dozen surly-looking dwarfs. Not just any dwarfs, however. Lockhart had them all wearing golden wings and carrying harps.

Good luck and remember that the theme this month is HP and the CoS!


Hints will be given in the private channels on Discord upon request. Tag @hint if your house is stuck and needs a hint to proceed. All hint requests will be logged in the #room-of-requirehint channel on Discord. Using hints will decrease your house’s hint bonus.

Work with your house to solve this puzzle. Puzzles should only be discussed in your house's Arithmancy Discord channel.

Links to the Reddit threads with your house’s Discord invite link: Gryffindor, Hufflepuff, Ravenclaw, Slytherin. (Note that you can only open these if you are a part of your house’s common room.*)

* If you would like to join your house’s common room, check here for instructions.

All students may participate even if you have not yet joined a common room. If a discussion has not yet been started in your common room, feel free to start one.

The answer will be a word or phrase. Submit your answer using this Google form. Each student may submit only ONE guess per level and may have only one Reddit account used for participating. You may only submit for your own house.

Every FIVE guesses, the current number of correct and incorrect guesses will be updated in this spreadsheet

The deadline is Wednesday, February 13, 3 PM ET

See the stickied announcements post for the full schedule and details on the scoring system.

2 Comments
2024/02/11
20:01 UTC

1

Puzzle 1 Results - February 7, 2024

Puzzle 1 Results

Link to puzzle: https://redd.it/1ajh8r6

Link to puzzle feedback form: https://forms.gle/bpy44CMZ2ca3z4wy6

Current Points for February

LevelGryffindorHufflepuffRavenclawSlytherin
Puzzle 10424649
Arithmancy Points0424649

Level Results

Speed bonus and Tiebreaker:

First - Slytherin - u/29925001838369 (Solved in 1 hr, 29 min) - 5 + 4 = 9 points

Second - Ravenclaw - u/stepsword (Solved in 2 hrs, 47 min) - 3 + 3 = 6 points

Third - Hufflepuff - u/ElPapo131 (Solved in 5 hrs, 59 min) - 0 + 2 = 2 points

Guesses from each house:

Slytherin - 2 Correct, 0 Incorrect

Ravenclaw - 1 Correct, 0 Incorrect

Hufflepuff - 3 Correct, 0 Incorrect

Hint Bonus:

Slytherin - 0 hints - 40 points

Ravenclaw - 0 hints - 40 points

Hufflepuff - 0 hints - 40 points

Solution

The answer was: >!Lockhart!<

Solution: Part 1: >!The flavour tells you you're playing Scrabble. Use the standard English values for the letters. Go in rainbow order, figuring out each word as you go, with the word in the green border being the answer. The word order goes as follows: Owl, Howler, Ford, Ghoul, Riddle, DIARY.!<

Part 2: >!IThe flavour mentions Chappe and telegram. Connecting the locations and then matching the direct line version to the Chappe semaphore alphabet gives you the answer.!<

Countdown to Puzzle 2

Note: “Arithmancy Points” are not the same as House Points. House Points will be awarded at the end of the month based on the combined total of “Arithmancy Points” earned.

1 Comment
2024/02/08
18:45 UTC

1

Level One - February, 2024

Level One

The pudding fell to the floor with a heart-stopping crash. Cream splattered the windows and walls as the dish shattered. With a crack like a whip, Dobby vanished.

Good luck and remember that the theme this month is HP and the CoS!


Hints will be given in the private channels on Discord upon request. Tag @hint if your house is stuck and needs a hint to proceed. All hint requests will be logged in the #room-of-requirehint channel on Discord. Using hints will decrease your house’s hint bonus.

Work with your house to solve this puzzle. Puzzles should only be discussed in your house's Arithmancy Discord channel.

Links to the Reddit threads with your house’s Discord invite link: Gryffindor, Hufflepuff, Ravenclaw, Slytherin. (Note that you can only open these if you are a part of your house’s common room.*)

* If you would like to join your house’s common room, check here for instructions.

All students may participate even if you have not yet joined a common room. If a discussion has not yet been started in your common room, feel free to start one.

The answer will be a word or phrase. Submit your answer using this Google form. Each student may submit only ONE guess per level and may have only one Reddit account used for participating. You may only submit for your own house.

Every FIVE guesses, the current number of correct and incorrect guesses will be updated in this spreadsheet

The deadline is Wednesday, February 7, 9 AM ET

See the stickied announcements post for the full schedule and details on the scoring system.

2 Comments
2024/02/05
14:02 UTC

1

February Announcements

Welcome back for the fifty-first month of r/Arithmancy! For those of you who are new, welcome to the Harry Potter puzzle subreddit where the students of Hogwarts are asked to work with their houses to decipher clues in order to practice their Arithmancy and curse-breaking skills.

Fill out this form if you would like to sign up for notifications when new puzzles or announcements are posted.

Puzzle Creators Wanted!

Are you interested in creating puzzles, but you don’t want to commit to joining the Arithmancy Professors? Check out our Prefect FAQs our Prefect Guide or our new Prefect Schedule!

Instructions for how to submit your puzzle can be found in the #links-and-resources channel on Discord.

If we choose your puzzle to use, you will be given a special Prefect role in Discord that allows you to talk to the professors while your puzzle is being solved, and to prevent you from helping your House during the puzzle. This is an awesome opportunity to test out being an Artificer without committing, too.

Feedback

We would like to hear your feedback about r/Arithmancy and your suggestions for making it better. Share your thoughts about the types and difficulty of puzzles, the hints system, the points system or anything else you think of below! What did you like about last month's puzzles? What did you dislike? Do you think changes should be made to make it more fun or fair for all houses? Comment below or use our anonymous feedback form.


February Schedule

The theme this month is: HP CoS!

Each level will last 48 hours and there will be a break between each level. The puzzles will be posted on r/Arithmancy and a link to the puzzle will be posted on Discord. The fourth puzzle each month is balanced for beginners, and isn’t worth points.

Hints will be given in the private channels on Discord upon request. Tag @hint if your house is stuck and needs a hint to proceed. All hint requests will be logged in the #room-of-requirehint channel on Discord.

There will be 4 levels this month:*

PuzzleStart TimeDeadline
Puzzle 1Monday, February 5, 9 AM ETWednesday, February 7, 9 AM ET
Puzzle 2Sunday, February 11, 3 PM ETTuesday, February 13, 3 PM ET
Puzzle 3Saturday, February 17, 9 PM ETMonday, February 19, 9 PM ET
Puzzle 4Saturday, February 24, 3 AM ETMonday, February 26, 3 AM ET

*Schedule is subject to change.


How to participate

Puzzles should only be discussed in your house's Arithmancy Discord channel* and your house common room. If you would like to join your house’s common room, check here for instructions.

Links to the Reddit threads with your house’s Discord invite link: Gryffindor, Hufflepuff, Ravenclaw, Slytherin (Note that you can only open these if you are a part of your house’s common room.)

A link to the submission form will be included with each puzzle posted. Each student may submit only ONE guess per level and may have only one Reddit account used for participating. You may only submit for your own house.

If you are caught breaking these rules, you will be removed from the game.

##Points

Here is the entirety of the points calculations as they stand:

Points will be awarded based on the speed of each house to solve each puzzle, and based on the number of hints they use to solve it. All 5 hints will be available for the duration of each puzzle, and for each hint they request, the hint bonus will be decreased accordingly:

  • 0 hints - 40 point bonus
  • 1 hint - 38 points
  • 2 hints - 35 points
  • 3 hints - 31 points
  • 4 hints - 26 points
  • 5 hints - 20 points

Houses will also be awarded a number of points based on how quickly they solve their puzzle as follows: an inverted sigmoid function, 5 / ( 1 + e^(10x/a-5) ) where a is the amount of time it took for the last house to solve the puzzle, will be used to calculate the bonus each house gets for their speed, relative to the speed of the other houses that solved. Here's a link to an interactive graph on Desmos, where you can see the resulting curve. This bonus has a maximum of 5 points.

There will also be a tiebreaker added to every score based on the order of who solves first. First place will earn 4 points, second: 3, third: 2, and fourth: 1 point.

Each house’s score will be calculated using Hint Bonus + Speed Bonus + Tiebreaker = Final Score

House points will be awarded at the end of the month, based on how many Arithmancy Points each house earned in total. House point calculations are based on the new proposal in HP Meta.

2 Comments
2024/02/01
18:14 UTC

1

Puzzle 4 Results - January 26, 2024

Puzzle 4 Results

Link to puzzle: https://redd.it/19ewsqf

Link to puzzle feedback form: https://forms.gle/bpy44CMZ2ca3z4wy6

Current Points for January

LevelGryffindorHufflepuffRavenclawSlytherin
Puzzle 10434242
Puzzle 2003835
Puzzle 30434542
Arithmancy Points086125119

Level Results

Guesses from each house:

Ravenclaw - 1 Correct, 0 Incorrect

Slytherin - 1 Correct, 0 Incorrect

This level was a training puzzle and therefore was not worth any points.

Hints:

Ravenclaw - 0 hints

Slytherin - 0 hints

Solution

The answer was: >!Earwax bean!<

Solution: Part 1: >!The flavour leads you to FCB knot cipher. Using the instructions to draw 6 continuous lines, one per line gives, and circling the bits in brackets, will give you the letters needed to spell “Corridor Fluffy stay“, which is the third floor!<

Part 2: >!In bold the flavour leads you to the starting letters of WW2 British military medals. The insignias and and written ranks don't match up, as hinted by the italics in the flavour. Work out the difference between each written rank and insignia and shift the letters of the medals accordingly to get “earwax bean“!<


Note: “Arithmancy Points” are not the same as House Points. House Points will be awarded at the end of the month based on the combined total of “Arithmancy Points” earned.


House Points for January

HouseGryffindorHufflepuffRavenclawSlytherin
House Points0161200194
1 Comment
2024/01/29
03:38 UTC

1

Level Four - January 24, 2023

Level Four

And the fleet of little boats moved off all at once, gliding across the lake, which was as smooth as glass. Everyone was silent, staring up at the great castle overhead.

Good luck and remember that the theme this month is HP and the PS!


As a reminder, this is a Training Puzzle! and won’t have a speed bonus or tie breaker! This is meant to be a chance for the more experienced puzzlers in the group to take a step back, and instead teach new students how to solve Arithmancy puzzles!

Hints will be given in the private channels on Discord upon request. Tag @hint if your house is stuck and needs a hint to proceed. All hint requests will be logged in the #room-of-requirehint channel on Discord. Using hints will decrease your house’s hint bonus.

Work with your house to solve this puzzle. Puzzles should only be discussed in your house's Arithmancy Discord channel.

Links to the Reddit threads with your house’s Discord invite link: Gryffindor, Hufflepuff, Ravenclaw, Slytherin. (Note that you can only open these if you are a part of your house’s common room.*)

* If you would like to join your house’s common room, check here for instructions.

All students may participate even if you have not yet joined a common room. If a discussion has not yet been started in your common room, feel free to start one.

The answer will be a word or phrase. Submit your answer using this Google form. Each student may submit only ONE guess per level and may have only one Reddit account used for participating. You may only submit for your own house.

Every FIVE guesses, the current number of correct and incorrect guesses will be updated in this spreadsheet

The deadline is Friday, January 26, 8 PM ET

See the stickied announcements post for the full schedule and details on the scoring system.

2 Comments
2024/01/25
01:01 UTC

1

Puzzle 3 Results - January 20, 2024

Puzzle 3 Results

Link to puzzle: https://redd.it/199xsl8

Link to puzzle feedback form: https://forms.gle/bpy44CMZ2ca3z4wy6

Current Points for January

LevelGryffindorHufflepuffRavenclawSlytherin
Puzzle 10434242
Puzzle 2003835
Puzzle 30434542
Arithmancy Points086125119

Level Results

Speed bonus and Tiebreaker:

First - Ravenclaw - u/stepsword (Solved in 7 hrs, 30 min) - 1 + 4 = 5 points

Second - Hufflepuff - u/quirkychipmunk (Solved in 8 hrs, 50 min) - 0 + 3 = 3 points

Third - Slytherin - u/Neeshky (Solved in 11 hrs, 31 min) - 0 + 2 = 2 points

Guesses from each house:

Ravenclaw - 3 Correct, 0 Incorrect

Hufflepuff - 1 Correct, 0 Incorrect

Slytherin - 1 Correct, 0 Incorrect

Hint Bonus:

Ravenclaw - 0 hints - 40 points

Hufflepuff - 0 hints - 40 points

Slytherin - 0 hints - 40 points

Solution

The answer was: >!Mirror of Erised!<

Solution: Part 1: >!The flavour referenced the wikia version of the sorting hat song from PS. There's sudoku with a few numbers missing and coloured blocks. The flavour tells you to use the pink before the blue. Complete the sudoku, index the song with the block as the verse, the pink as the line, and the blue as the word. Use the initials to get Aconite.!< Part 2: >!The flavour tells you to use poem code (Wikipedia has a nice article with instructions). Solve the poem code (wikipedia can explain it better, but ping Tali if you have questions) to get a bit from PS that asks for the common room password, which is Caput Draconis.!< Part 3: >!There were some words in other languages (French, Turkish, Finnish, Afrikaans, and Welsh) and some English words written backwards. All the foreign words translate to the same colours, so looking past that you are left with one word per column. It's the saying above the mirror of Erised, and the stamp is backwards as a clue to help, but some people simply recognised Erised or parts of the phrase.!<

Countdown to Puzzle 4

Note: “Arithmancy Points” are not the same as House Points. House Points will be awarded at the end of the month based on the combined total of “Arithmancy Points” earned.

1 Comment
2024/01/21
19:35 UTC

1

Level Three - January 18, 2023

Level Three

“Well, Harry, you take the place of that bishop, and Hermione, you go there instead of that castle.”

Good luck and remember that the theme this month is HP and the PS!


Hints will be given in the private channels on Discord upon request. Tag @hint if your house is stuck and needs a hint to proceed. All hint requests will be logged in the #room-of-requirehint channel on Discord. Using hints will decrease your house’s hint bonus.

Work with your house to solve this puzzle. Puzzles should only be discussed in your house's Arithmancy Discord channel.

Links to the Reddit threads with your house’s Discord invite link: Gryffindor, Hufflepuff, Ravenclaw, Slytherin. (Note that you can only open these if you are a part of your house’s common room.*)

* If you would like to join your house’s common room, check here for instructions.

All students may participate even if you have not yet joined a common room. If a discussion has not yet been started in your common room, feel free to start one.

The answer will be a word or phrase. Submit your answer using this Google form. Each student may submit only ONE guess per level and may have only one Reddit account used for participating. You may only submit for your own house.

Every FIVE guesses, the current number of correct and incorrect guesses will be updated in this spreadsheet

The deadline is Saturday, January 20, 2 PM ET

See the stickied announcements post for the full schedule and details on the scoring system.

2 Comments
2024/01/18
19:01 UTC

1

Puzzle 2 Results - January 14, 2024

Puzzle 2 Results

Link to puzzle: https://redd.it/194ujd4

Link to puzzle feedback form: https://forms.gle/bpy44CMZ2ca3z4wy6

Current Points for January

LevelGryffindorHufflepuffRavenclawSlytherin
Puzzle 10434242
Puzzle 2003835
Arithmancy Points0438077

Level Results

Speed bonus and Tiebreaker:

First - Slytherin - u/Neeshky (Solved in 45 hrs, 11 min) - 0 + 4 = 4 points

Second - Ravenclaw - u/stepsword (Solved in 48 hrs, 2 min) - 0 + 3 = 3 points

Guesses from each house:

Slytherin - 1 Correct, 0 Incorrect

Ravenclaw - 1 Correct, 1 Incorrect

Hint Bonus:

Slytherin - 3 hints - 31 points

Ravenclaw - 2 hints - 35 points

Solution

The answer was: >!Snuffboxes!<

Solution: Part 1: >!The flavour mentions the moon and tracking it through the month. The given words are Hawaiian names for different moon phases. Matching that with the lunar alphabet on dcode gives you “Flamel wife name“, which is Perenelle.!<

Part 2: >!The flavour mentions a letter with a cipher written by someone, and it being a key. The ingredients for a bloody Mary cocktail are listed on the Scottish flag, hinting at Mary Queen of Scots, also called Bloody Mary. She used several codes to encrypt her messages, including the one on dcode, which will translate the symbols to “Babington plot“, which is the key for the gibberish string. This will give you “which year did the gargoyle strike take place?“ The answer being 1911.!<

Part 3: >!The flavour has “FIVE“ in all caps, and “phone home“ in bold. The 5 hints at bacon cipher. The phone home hints at E.T. If you match the green blocks on the sheet to the words, and then in order read the E's and T's, it will give the bacon for “Mice into“, referring to the first year transfiguration spell that turns mice into snuffboxes.!<

Countdown to Puzzle 3

Note: “Arithmancy Points” are not the same as House Points. House Points will be awarded at the end of the month based on the combined total of “Arithmancy Points” earned.

1 Comment
2024/01/14
15:11 UTC

1

Level Two - January 12, 2023

Level Two

The narrow path had opened suddenly onto the edge of a great black lake. Perched atop a high mountain on the other side, its windows sparkling in the starry sky, was a vast castle with many turrets and towers.

Good luck and remember that the theme this month is HP and the PS!


Hints will be given in the private channels on Discord upon request. Tag @hint if your house is stuck and needs a hint to proceed. All hint requests will be logged in the #room-of-requirehint channel on Discord. Using hints will decrease your house’s hint bonus.

Work with your house to solve this puzzle. Puzzles should only be discussed in your house's Arithmancy Discord channel.

Links to the Reddit threads with your house’s Discord invite link: Gryffindor, Hufflepuff, Ravenclaw, Slytherin. (Note that you can only open these if you are a part of your house’s common room.*)

* If you would like to join your house’s common room, check here for instructions.

All students may participate even if you have not yet joined a common room. If a discussion has not yet been started in your common room, feel free to start one.

The answer will be a word or phrase. Submit your answer using this Google form. Each student may submit only ONE guess per level and may have only one Reddit account used for participating. You may only submit for your own house.

Every FIVE guesses, the current number of correct and incorrect guesses will be updated in this spreadsheet

The deadline is Sunday, January 14, 8 AM ET

See the stickied announcements post for the full schedule and details on the scoring system.

3 Comments
2024/01/12
13:02 UTC

1

Puzzle 1 Results - January 8, 2024

Puzzle 1 Results

Link to puzzle: https://redd.it/18zu3h4

Link to puzzle feedback form: https://forms.gle/bpy44CMZ2ca3z4wy6

Current Points for January

LevelGryffindorHufflepuffRavenclawSlytherin
Puzzle 10434242
Arithmancy Points0434242

Level Results

Speed bonus and Tiebreaker:

First - Slytherin - u/Neeshky (Solved in 33 hrs, 30 min) - 0 + 4 = 4 points

Second - Hufflepuff - u/quirkychipmunk (Solved in 33 hrs, 40 min) - 0 + 3 = 3 points

Third - Ravenclaw - u/stepsword (Solved in 34 hrs, 9 min) - 0 + 2 = 2 points

Guesses from each house:

Slytherin - 2 Correct, 0 Incorrect

Hufflepuff - 3 Correct, 0 Incorrect

Ravenclaw - 2 Correct, 0 Incorrect

Hint Bonus:

Slytherin - 1 hint - 38 points

Hufflepuff - 0 hints - 40 points

Ravenclaw - 0 hints - 40 points

Solution

The answer was: >!Ravenclaw!<

Solution: Part 1: >!Plot each of the 7 paths followed on the map provided (or really any map of NY city grid). The first letters of the 7 people spell “ROTATES”. When the map is rotated the plotted paths spell the answer (Hogsmeade).!<

Part 2: >! The flavour says that names don't matter, so if you simply looked at the initials for names with numbers you got C, D, H and S. The flavour also mentions “playing“, black and red, and the numbers never go over 10, so these are playing cards. Taking the number of the card to A1Z26, with black suits being A-M and red suits being N-Z, it gives you the answer(Turban). The jacks, kings and queens all have names you could google, or work around it.!<

Part 3: >!The board looks like tetris, but the flavour tells you it's not. The shapes are what matters. The flavour mentions pens and shapes. It's pigpen, with the same colour shapes touching each other forming the letters.!<

Countdown to Puzzle 2

Note: “Arithmancy Points” are not the same as House Points. House Points will be awarded at the end of the month based on the combined total of “Arithmancy Points” earned.

1 Comment
2024/01/08
17:56 UTC

1

Level One - January 6, 2023

Level One

He turned to smile at the tabby, but it had gone. Instead he was smiling at a rather severe-looking woman who had square glasses exactly the shape of the markings the cat had had around its eyes.

Good luck and remember that the theme this month is HP and the PS!


Hints will be given in the private channels on Discord upon request. Tag @hint if your house is stuck and needs a hint to proceed. All hint requests will be logged in the #room-of-requirehint channel on Discord. Using hints will decrease your house’s hint bonus.

Work with your house to solve this puzzle. Puzzles should only be discussed in your house's Arithmancy Discord channel.

Links to the Reddit threads with your house’s Discord invite link: Gryffindor, Hufflepuff, Ravenclaw, Slytherin. (Note that you can only open these if you are a part of your house’s common room.*)

* If you would like to join your house’s common room, check here for instructions.

All students may participate even if you have not yet joined a common room. If a discussion has not yet been started in your common room, feel free to start one.

The answer will be a word or phrase. Submit your answer using this Google form. Each student may submit only ONE guess per level and may have only one Reddit account used for participating. You may only submit for your own house.

Every FIVE guesses, the current number of correct and incorrect guesses will be updated in this spreadsheet

The deadline is Monday, January 8, 2 AM ET

See the stickied announcements post for the full schedule and details on the scoring system.

2 Comments
2024/01/06
07:01 UTC

1

January Announcements

Welcome back for the fiftieth month of r/Arithmancy! For those of you who are new, welcome to the Harry Potter puzzle subreddit where the students of Hogwarts are asked to work with their houses to decipher clues in order to practice their Arithmancy and curse-breaking skills.

Fill out this form if you would like to sign up for notifications when new puzzles or announcements are posted.

Puzzle Creators Wanted!

Are you interested in creating puzzles, but you don’t want to commit to joining the Arithmancy Professors? Check out our Prefect FAQs our Prefect Guide or our new Prefect Schedule!

Instructions for how to submit your puzzle can be found in the #links-and-resources channel on Discord.

If we choose your puzzle to use, you will be given a special Prefect role in Discord that allows you to talk to the professors while your puzzle is being solved, and to prevent you from helping your House during the puzzle. This is an awesome opportunity to test out being an Artificer without committing, too.

Feedback

We would like to hear your feedback about r/Arithmancy and your suggestions for making it better. Share your thoughts about the types and difficulty of puzzles, the hints system, the points system or anything else you think of below! What did you like about last month's puzzles? What did you dislike? Do you think changes should be made to make it more fun or fair for all houses? Comment below or use our anonymous feedback form.


January Schedule

The theme this month is: Harry Potter and the Philosopher's Stone!

Each level will last 48 hours and there will be a break between each level. The puzzles will be posted on r/Arithmancy and a link to the puzzle will be posted on Discord. The fourth puzzle each month is balanced for beginners, and isn’t worth points.

Hints will be given in the private channels on Discord upon request. Tag @hint if your house is stuck and needs a hint to proceed. All hint requests will be logged in the #room-of-requirehint channel on Discord.

There will be 4 levels this month:*

PuzzleStart TimeDeadline
Puzzle 1Saturday, January 6, 2 AM ETMonday, January 8, 2 AM ET
Puzzle 2Friday, January 12, 8 AM ETSunday, January 14, 8 AM ET
Puzzle 3Thursday, January 18, 2 PM ETSaturday, January 20, 2 PM ET
Puzzle 4Wednesday, January 24, 8 PM ETFriday, January 26, 8 PM ET

*Schedule is subject to change.


How to participate

Puzzles should only be discussed in your house's Arithmancy Discord channel* and your house common room. If you would like to join your house’s common room, check here for instructions.

Links to the Reddit threads with your house’s Discord invite link: Gryffindor, Hufflepuff, Ravenclaw, Slytherin (Note that you can only open these if you are a part of your house’s common room.)

A link to the submission form will be included with each puzzle posted. Each student may submit only ONE guess per level and may have only one Reddit account used for participating. You may only submit for your own house.

If you are caught breaking these rules, you will be removed from the game.

##Points

Here is the entirety of the points calculations as they stand:

Points will be awarded based on the speed of each house to solve each puzzle, and based on the number of hints they use to solve it. All 5 hints will be available for the duration of each puzzle, and for each hint they request, the hint bonus will be decreased accordingly:

  • 0 hints - 40 point bonus
  • 1 hint - 38 points
  • 2 hints - 35 points
  • 3 hints - 31 points
  • 4 hints - 26 points
  • 5 hints - 20 points

Houses will also be awarded a number of points based on how quickly they solve their puzzle as follows: an inverted sigmoid function, 5 / ( 1 + e^(10x/a-5) ) where a is the amount of time it took for the last house to solve the puzzle, will be used to calculate the bonus each house gets for their speed, relative to the speed of the other houses that solved. Here's a link to an interactive graph on Desmos, where you can see the resulting curve. This bonus has a maximum of 5 points.

There will also be a tiebreaker added to every score based on the order of who solves first. First place will earn 4 points, second: 3, third: 2, and fourth: 1 point.

Each house’s score will be calculated using Hint Bonus + Speed Bonus + Tiebreaker = Final Score

House points will be awarded at the end of the month, based on how many Arithmancy Points each house earned in total. House point calculations are based on the new proposal in HP Meta.

2 Comments
2024/01/03
16:53 UTC

2

December Holiday Puzzle 1 2023

Welcome to the Arithmancy Holiday Puzzles: Puzzle 1. Don’t argue with your family, come suffer with us instead! At least you get results when you solve, unlike trying to convince your drunk uncle that the earth isn’t flat.

There will be no points involved. This is just for fun. Hints are unlimited, but I urge you to not misuse them, and only to use them when you are truly stuck. Please do not undermine the spirit of the game in order to speedrun through it. Remember other people want to solve too, and can provide fresh eyes and different insights, but are sometimes busy.

This first puzzle will have a two hour delay between parts 1 and 2, and the rest of the puzzle. This is a test run for using a time gap to allow different time zones to join in. This will only be applicable to the holiday puzzles.

The puzzles will be solved in the Arithmancy discord server.

The schedule is as follows:

Puzzle 1: Gryffindor and Slytherin vs. Hufflepuff and Ravenclaw.

Friday, 8 December 2023 05:00 UTC until Sunday, 10 December 2023 17:00 UTC.

Puzzle 2: Gryffindor and Ravenclaw vs. Hufflepuff and Slytherin.

Friday, 15 December 2023 11:00 UTC until Sunday, 17 December 2023 23:00 UTC.

Puzzle 3: Gryffindor and Hufflepuff vs. Ravenclaw and Slytherin.

Friday, 22 December 2023 08:00 UTC until Sunday, 24 December 2023 20:00 UTC.

Puzzle 4: All houses together.

Friday, 29 December 2023 14:00 UTC until Sunday, 31 December 2023 14:00 UTC.

2 Comments
2023/12/08
05:29 UTC

1

Puzzle 4 Results - November 27, 2023

Puzzle 4 Results

Link to puzzle: https://redd.it/183d23b

Link to puzzle feedback form: https://forms.gle/bpy44CMZ2ca3z4wy6

Current Points for November

LevelGryffindorHufflepuffRavenclawSlytherin
Puzzle 141464948
Puzzle 241474948
Puzzle 3045430
Arithmancy Points8213814196

Level Results

Guesses from each house:

Slytherin - 2 Correct, 0 Incorrect

Ravenclaw - 2 Correct, 1 Incorrect

Hufflepuff - 1 Correct, 0 Incorrect

This level was a training puzzle and therefore was not worth any points.

Hints:

Slytherin - 2 hints

Ravenclaw - 0 hints

Hufflepuff - 0 hints

Solution

The answer was: >!Dog biscuit!<

Solution: Part 1

!The flavour mentions morse. So convert the given string to morse code, keeping the grouping of the string as if they were words. This would result in groups of 5 dots and dashes total for each group. The flavour mentions something being “not kosher“, which was to help hint at the bacon cipher, but that was intended more as confirmation after finding the groups of 5.!<

Part 2

!There are symbols in the icing. The flavour mentions “Spock“, hinting at star trek. The symbols and the star trek hint put together would mean that the symbols must be from star trek, so googling and looking around for star trek writing systems should lead you to the Vulcan alphabet, which will help you translate the answer.!<


Note: “Arithmancy Points” are not the same as House Points. House Points will be awarded at the end of the month based on the combined total of “Arithmancy Points” earned.


House Points for November

HouseGryffindorHufflepuffRavenclawSlytherin
House Points141197200155
1 Comment
2023/11/29
14:31 UTC

1

Level Four - November 25, 2023

Level Four

Now, with the sun newly risen and the mist lifting, they could see the city of tents that stretched in every direction.

Good luck and remember that the theme this month is Holidays!


As a reminder, this is a Training Puzzle! and won’t have a speed bonus or tie breaker! This is meant to be a chance for the more experienced puzzlers in the group to take a step back, and instead teach new students how to solve Arithmancy puzzles!

Hints will be given in the private channels on Discord upon request. Tag @hint if your house is stuck and needs a hint to proceed. All hint requests will be logged in the #room-of-requirehint channel on Discord. Using hints will decrease your house’s hint bonus.

Work with your house to solve this puzzle. Puzzles should only be discussed in your house's Arithmancy Discord channel.

Links to the Reddit threads with your house’s Discord invite link: Gryffindor, Hufflepuff, Ravenclaw, Slytherin. (Note that you can only open these if you are a part of your house’s common room.*)

* If you would like to join your house’s common room, check here for instructions.

All students may participate even if you have not yet joined a common room. If a discussion has not yet been started in your common room, feel free to start one.

The answer will be a word or phrase. Submit your answer using this Google form. Each student may submit only ONE guess per level and may have only one Reddit account used for participating. You may only submit for your own house.

Every FIVE guesses, the current number of correct and incorrect guesses will be updated in this spreadsheet

The deadline is Monday, November 27, 1 AM ET

See the stickied announcements post for the full schedule and details on the scoring system.

2 Comments
2023/11/25
06:02 UTC

1

Puzzle 3 Results - November 20, 2023

Puzzle 3 Results

Link to puzzle: https://redd.it/17yjx2c

Link to puzzle feedback form: https://forms.gle/bpy44CMZ2ca3z4wy6

Current Points for November

LevelGryffindorHufflepuffRavenclawSlytherin
Puzzle 141464948
Puzzle 241474948
Puzzle 3045430
Arithmancy Points8213814196

Level Results

Speed bonus and Tiebreaker:

First - Hufflepuff - u/quirkychipmunk (Solved in 1 hr, 18 min) - 1 + 4 = 5 points

Second - Ravenclaw - u/su-yun (Solved in 1 hr, 50 min) - 0 + 3 = 3 points

Guesses from each house:

Hufflepuff - 4 Correct, 0 Incorrect

Ravenclaw - 2 Correct, 0 Incorrect

Hint Bonus:

Hufflepuff - 0 hints - 40 points

Ravenclaw - 0 hints - 40 points

Solution

The answer was: >!Penknife!<

Solution: Part 1

!The image was made to look like the books, hinting at a book cipher. The books matched with the Weasley siblings from oldest to youngest, with Bill representing PS and Ginny DH. In the dialogue, words that sounded like numbers were used, which gave the page numbers. The flavour also said everything counts, so counting the amount of words said by each sibling gives which word on the page should be used, giving you “where harry free food summer third year“, which was the ice cream parlour.!<

Part 2

!Each line is written in a different language. When translated, it gives another language. Taking the initial of the written language, and subtracting the initial of the language it was written in in A1Z26 gives you the word “penknife“, which is the final answer.!<

Countdown to Puzzle 4

Note: “Arithmancy Points” are not the same as House Points. House Points will be awarded at the end of the month based on the combined total of “Arithmancy Points” earned.

1 Comment
2023/11/21
02:43 UTC

Back To Top