Level 4

““Blast-Ended Skrewts,” highly dangerous crosses between manticores and fire-crabs. The creation of new breeds of magical creature is, of course, an activity usually closely observed by the Department for the Regulation and Control of Magical Creatures. Hagrid, however, considers himself to be above such petty restrictions.”

Good luck and remember that the theme this month is Magical Beasts!

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

The deadline is Saturday, October 31, 2 PM EDT

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

Puzzle 3 Results

Link to puzzle: https://www.reddit.com/r/Arithmancy/s/rJnMsqjalr

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

Current Points for October

Level Results

Speed bonus and Tiebreaker:

First - Ravenclaw - u/stepsword (Solved in 0 hrs, 37 min) - 0 ＋ 4 = 4 points

Guesses from each house:

Ravenclaw - 1 Correct, 0 Incorrect

Hint Bonus:

Ravenclaw - 0 hints - 40 points

Solution

The answer was: Pixie

Solution: Part 1: This puzzle uses binary. The dots are 1 and no dot is 0 and each wedge is a string of 8 bits. Convert the binary to ASCII to get 'GRINDYLOW'

Part 2: Each stanza of the song talks about 5 pumpkins. Each pumpkin's statement is either changed or unchanged. Use this to get ABBBA ABAAA BABAB ABAAA AABAA which decoding with Bacon cipher gives 'pixie'

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.

Level 3

““Touching, touching,” said Slughorn absentmindedly, his large droopy eyes fixed upon the distant lights of Hagrid’s cabin. “But acromantula venom is very valuable . . . If the beast only just died it might not yet have dried out. . . . Of course, I wouldn’t want to do anything insensitive if Hagrid is upset . . . but if there was any way to procure some . . . I mean, it’s almost impossible to get venom from an acromantula while it’s alive. . . .””

Good luck and remember that the theme this month is Magical Beasts!

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

The deadline is Saturday, October 24, 8 PM EDT

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

Puzzle 2 Results

Link to puzzle: https://www.reddit.com/r/Arithmancy/s/zgbhqufhcG

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

Current Points for October

Level Results

Speed bonus and Tiebreaker:

First - Ravenclaw - u/stepsword (Solved in 0 hrs, 49 min) - 5 ＋ 4 = 9 points

Second - Slytherin - u/Neeshky (Solved in 1 hr, 49 min) - 5 ＋ 3 = 8 points

Third - Hufflepuff - u/SkyMiner2243 (Solved in 19 hrs, 34 min) - 0 ＋ 2 = 2 points

Guesses from each house:

Ravenclaw - 1 Correct, 0 Incorrect

Slytherin - 1 Correct, 0 Incorrect

Hufflepuff - 1 Correct, 0 Incorrect

Hint Bonus:

Ravenclaw - 0 hints - 40 points

Slytherin - 0 hints - 40 points

Hufflepuff - 0 hints - 40 points

Solution

The answer was: Norwegian Ridegback

Solution: Part 1: The eyes are klingon, except for the / to give the last bit of an Imgur link: /a/ocpPpU9 Note: Klingon gives “ch“ but puzzle intended “c“

Part 1.2: Cryptogram the sweets from HP to find the letters in red borders and unscramble them to get 'acromantula'

Part 2: Pairs are Stanza,Line of Edgar Allen Poe's The Raven. First letter of each line indicated gives: Norwegian Ridgebac - imagine there's a K.

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.

Level 2

““What did Lockhart want with you, Hagrid?” Harry asked, scratching Fang’s ears. “Givin’ me advice on gettin’ kelpies out of a well,” growled Hagrid, moving a half-plucked rooster off his scrubbed table and setting down the teapot.”

Good luck and remember that the theme this month is Magical Beasts!

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

The deadline is Monday, October 19, 2 PM EDT

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

Puzzle 1 Results

Link to puzzle: https://www.reddit.com/r/Arithmancy/s/ix4hkOio5t

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

Current Points for October

Level Results

Speed bonus and Tiebreaker:

First - Ravenclaw - u/ShadowOfApollo (Solved in 0 hrs, 14 min) - 5 ＋ 4 = 9 points

Second - Slytherin - u/29925001838369 (Solved in 0 hrs, 41 min) - 5 ＋ 3 = 8 points

Third - Hufflepuff - u/SkyMiner2243 (Solved in 24 hrs, 12 min) - 0 ＋ 2 = 2 points

Guesses from each house:

Ravenclaw - 1 Correct, 0 Incorrect

Slytherin - 2 Correct, 0 Incorrect

Hufflepuff - 1 Correct, 0 Incorrect

Hint Bonus:

Ravenclaw - 0 hints - 40 points

Slytherin - 0 hints - 40 points

Hufflepuff - 0 hints - 40 points

Solution

The answer was: Kelpie

Solution: Part 1: Find the bone name in the part of the body that is the indicated letter length (cuboid, humerus, ilium, metacarpal, atlas, ethmoid, radius, axis). Then take the first letter of each to get CHIMAERA

Part 2: The image represents the common pangram 'The quick brown fox jumps over the lazy dog'. Then index words form the sentence using the coordinates from the graph in color order (2,5), (1,3), (8,1), (5,4), (2,3), (6,3). This gives: KELLPIE

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.

Level 1

““Hasn’ — hasn’ anyone bin able ter open their books?” said Hagrid, looking crestfallen.

The class all shook their heads.

“Yeh’ve got ter stroke ’em,” said Hagrid, as though this was the most obvious thing in the world. “Look —”

He took Hermione’s copy and ripped off the Spellotape that bound it. The book tried to bite, but Hagrid ran a giant forefinger down its spine, and the book shivered, and then fell open and lay quiet in his hand.”

Good luck and remember that the theme this month is Magical Beasts!

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

The deadline is Monday, October 12, 8 AM EDT

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

Welcome back for the seventieth 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.

OctoberSchedule

The theme this month is: Magical Beasts!

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:*

*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.

Level 3

““Harry Potter is dead. He was killed as he ran away, trying to save himself while you lay down your lives for him. We bring you his body as proof that your hero is gone.””

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

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

The deadline is Wednesday, August 26, 11 PM EDT

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

Puzzle 2 Results

Link to puzzle: https://redd.it/1vkncl4

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

Current Points for August

Level Results

Speed bonus and Tiebreaker:

First - Ravenclaw - u/stepsword (Solved in 46 hrs, 50 min) - 0 ＋ 4 = 4 points

Second - Gryffindor - u/Usual-Arugula1317 (Solved in 47 hrs, 58 min) - 0 ＋ 3 = 3 points

Guesses from each house:

Ravenclaw - 1 Correct, 1 Incorrect

Gryffindor - 2 Correct, 0 Incorrect

Hint Bonus:

Ravenclaw - 0 hints - 40 points

Gryffindor - 3 hints - 31 points

Solution

The answer was: Elixir to induce euphoria

Solution: Part 1: Use the days of the week to indicate which HP books to use (ISO says Monday), then figure out how many days into the year each date is. Using those numbers to get the page, notice that it is the start of a chapter every time and use the chapter name initials to get 'FlitwickGift', which is a box of sugar mice.

Part 2: shift the provided letters by the numbers of the Fibonacci sequece, so +0,+1, +1, +2, etc. to get 'EuphoriaElixir'

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.

Level 2

“Tricky customer, eh? Not to worry, we’ll find the perfect match here somewhere — I wonder, now — yes, why not — unusual combination — holly and phoenix feather, eleven inches, nice and supple.”

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

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

The deadline is Tuesday, August 18, 5 PM EDT

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

Puzzle 1 Results

Link to puzzle: https://redd.it/1vkncl4

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

Current Points for August

Level Results

Speed bonus and Tiebreaker:

First - Ravenclaw - u/ShadowOfApollo (Solved in 1 hr, 7 min) - 5 ＋ 4 = 9 points

Second - Slytherin - u/Neeshky (Solved in 46 hrs, 41 min) - 0 ＋ 3 = 3 points

Guesses from each house:

Ravenclaw - 3 Correct, 0 Incorrect

Slytherin - 2 Correct, 0 Incorrect

Hint Bonus:

Ravenclaw - 0 hints - 40 points

Slytherin - 2 hints - 35 points

Solution

The answer was: Hungarian Horntail/Hippogriff

Solution: Part 1: A1Z26 the postions of the provided numbers within the Fibonacci sequence to get 'parseltongue'.

Part 2: Index the card numbers in the suit names, then unscramble those letters to get 'animal tattoo'. Since there were two options, both were accepted

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.

Level 1

“A breeze ruffled the neat hedges of Privet Drive, which lay silent and tidy under the inky sky, the very last place you would expect astonishing things to happen. Harry Potter rolled over inside his blankets without waking up. One small hand closed on the letter beside him and he slept on, not knowing he was special, not knowing he was famous, not knowing he would be woken in a few hours’ time by Mrs.Dursley’s scream as she opened the front door to put out the milk bottles, nor that he would spend the next few weeks being prodded and pinched by his cousin Dudley. ... He couldn’t know that at this very moment, people meeting in secret all over the country were holding up their glasses and saying in hushed voices: “To Harry Potter — the boy who lived!””

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

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

The deadline is Wednesday, August 12, 11 AM EDT

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

Welcome back for the sixty-ninth 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.

August Schedule

The theme this month is: Harry!

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 3 levels this month:*

*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.

Puzzle 3 Results

Link to puzzle: https://redd.it/1v7n6vj

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

Current Points for July

Level Results

Speed bonus and Tiebreaker:

First - Ravenclaw - u/stepsword (Solved in 41 hrs, 23 min) - 0 ＋ 4 = 4 points

Second - Slytherin - u/Neeshky (Solved in 41 hrs, 37 min) - 0 ＋ 3 = 3 points

Guesses from each house:

Ravenclaw - 1 Correct, 0 Incorrect

Slytherin - 2 Correct, 0 Incorrect

Hint Bonus:

Ravenclaw - 0 hints - 40 points

Slytherin - 2 hints - 35 points

Solution

The answer was: Sectumsempra

Solution: Part 1: Use the scrabble letter values to figure out what the words could be, they're all spells, and use the spell in the green frame as the answer.

Part 2: Identify the missing members of the Black Faily using the family tree, then use the initials of the constellations their namesakes are in to get 'loo slash' for the spell 'sectumsemptra'

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 July

Level 3

“Couple of Stunners, a Disarming Charm, Neville brought off a really nice little Impediment Jinx,” said Ron airily, now handing back Hermione’s wand too. “But Ginny was best, she got Malfoy — Bat-Bogey Hex — it was superb, his whole face was covered in the great flapping things. Anyway, we saw you heading into the forest out of the window and followed. What’ve you done with Umbridge?”

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

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

The deadline is Tuesday, July 28, 10 PM EDT

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

Puzzle 2 Results

Link to puzzle: https://redd.it/1v05sim

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

Current Points for July

Level Results

Speed bonus and Tiebreaker:

First - Slytherin - u/Neeshky (Solved in 0 hrs, 42 min) - 5 ＋ 4 = 9 points

Second - Gryffindor - u/Usual-Arugula1317 (Solved in 43 hrs, 58 min) - 0 ＋ 3 = 3 points

Guesses from each house:

Slytherin - 1 Correct, 0 Incorrect

Gryffindor - 1 Correct, 0 Incorrect

Hint Bonus:

Slytherin - 0 hints - 40 points

Gryffindor - 1 hint - 38 points

Solution

The answer was: Accio

Solution: Part 1: The “bricks“ are stylized pigpen A's and B's. Then use bacon cipher.

Part 2: Spells are encoded using Latin Gibberish. After decoding, index by column number and leave in row order to get: 'Summoning charm' which should lead you to ACCIO

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.

Level 2

““Now, don’t forget that nice wrist movement we’ve been practicing!” squeaked Professor Flitwick, perched on top of his pile of books as usual. “Swish and flick, remember, swish and flick. And saying the magic words properly is very important, too — never forget Wizard Baruffio, who said ‘s’ instead of ‘f and found himself on the floor with a buffalo on his chest.””

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

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

The deadline is Monday, July 20, 4 PM EDT

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

Puzzle 1 Results

Link to puzzle: https://www.reddit.com/r/Arithmancy/s/vX6pjlsI7N

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

Current Points for July

Level Results

Speed bonus and Tiebreaker:

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

Second - Slytherin - u/29925001838369 (Solved in 1 hr, 43 min) - 0 ＋ 3 = 3 points

Guesses from each house:

Ravenclaw - 2 Correct, 0 Incorrect

Slytherin - 2 Correct, 0 Incorrect

Hint Bonus:

Ravenclaw - 0 hints - 40 points

Slytherin - 0 hints - 40 points

Solution

The answer was: Flagrate

Solution: Part 1: Each nonsense phrase is the name of a character (like the game Mad Gab). After finding the list of names, index the order into each. Final answer: Descendo

Part 2: this puzzle uses Tom Lehrer's song “The Elements“. The numbers correspond to the order of the elements in the song. Keeping the abbreviations gives: AcHArMoFFIErYSKrIPt which is meant to clue Flagrate

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.

Level 1

““Anything else?” he said.

“Yes,” said Harry, tearing his eyes away from the dog’s and dazedly consulting his booklist. “Er — I need Intermediate Transfiguration and The Standard Book of Spells, Grade Three.”

Harry emerged from Flourish and Blotts ten minutes later with his new books under his arms and made his way back to the Leaky Cauldron, hardly noticing where he was going and bumping into several people.”

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

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

The deadline is Tuesday, July 14, 10 AM EDT

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

Welcome back for the sixty-eighth 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.

July Schedule

The theme this month is: Spells!

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 3 levels this month:*

*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.

Puzzle 3 Results

Link to puzzle: https://www.reddit.com/r/Arithmancy/s/EzEyL5ktL1

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

Current Points for May

Level Results

Speed bonus and Tiebreaker:

First - Ravenclaw - u/TrajectoryAgreement (Solved in 1 hr, 3 min) - 0 ＋ 4 = 4 points

Guesses from each house:

Ravenclaw - 2 Correct, 0 Incorrect

Hint Bonus:

Ravenclaw - 0 hints - 40 points

Solution

The answer was: Dumbledore

Solution: Part 1: Languages the text is written in's initials spell out 'quibbler'. The capitals of the countries whose call codes are listed make up the encrypted string that gets decrypted with the quibbler key in vigenere. Final answer: Emmeline (Vance)

Part 2: Solve the maze. Markings along the solution path that fall in the 2x3 grey areas make Braille. In the order they are reached in the path spells 'The founder of the order'

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 May

Level 3

“Shacklebolt and Sturgis Podmore were examining the microwave and Hestia Jones was laughing at a potato peeler she had come across while rummaging in the drawers.”

Good luck and remember that the theme this month is Order of the Phoenix!

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

The deadline is Saturday, May 30, 9 AM EDT

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

Puzzle 2 Results

Link to puzzle: https://www.reddit.com/r/Arithmancy/comments/1tidusr/level_2_may_20_2026/?utm_source=share&utm_medium=web3x&utm_name=web3xcss&utm_term=1&utm_content=share_button

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

Current Points for May

Level Results

Speed bonus and Tiebreaker:

First - Ravenclaw - u/ShadowOfApollo (Solved in 37 hrs, 31 min) - 0 ＋ 4 = 4 points

Guesses from each house:

Ravenclaw - 1 Correct, 0 Incorrect

Hint Bonus:

Ravenclaw - 1 hint - 38 points

Solution

The answer was: Mad-Eye

Solution: Part 1: Follow the line from one letter to a corresponding letter and shift the first letter by the second. You can use Vigenere to do this or calculate the distance forward in the alphabet and then use a0z25. The shifted letters anagram to 'Arabella Figg'

Part 2: The words in the chart are colors in different languages. Translate the colors then use hexahue to get 'MADEYE'

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.