#thinky puzzles

logic puzzles

1. nonbinary masyu, designed by walker for the 2023 puzzler pride edition of the griddle. link goes to the pdf of the whole puzzle pack, where this puzzle and its rules can be found on page 5.

2. recursive masyu, designed by fleb, with a super unique variety mechanic. link contains the rules. (fleb had a stellar youtube channel going in the past with really well made breakdown videos of various puzzles. all of it is worth watching)

3. rush hour sudoku, designed by chameleon, which adds an interactive mechanic to a sudoku. link contains the rules and a playable solver that they coded themselves

4. the miracle sudoku, designed by mitchell lee, which at this point is incredibly famous. link contains the rules and a playable solver.

5. foggy twilight kurotto, designed by menderbug. good if you've done a twilight kurotto, or a normal kurotto, before. link contains the rules and a playable solver via penpa+.

6. choco banana, designed by tawan sunathvanichkul for the 79th issue of tambox bulletin. link goes to the pdf for the whole puzzle page, where this puzzle is on the left side.

7. litherslink, designed by michael3.14 for the snakes on a plane series in the cracking the cryptic discord server. i've played slitherlink before, and this messed with my head. link goes to a puzz.link solver with the rules in Help -> Rules.

8. star battle, designed by jack lance (rest in peace). oh, is there no link for it? that's weird.

word puzzles

9. bagel shop caption puzzle, a rows garden published by the new yorker. link contains a solver with the clues.

10. printer's devilry, a crossword by kyle dolan with printer's devilry clues. link goes to a solver on amuselabs with the clues and an explanation of how to solve them.

11. safe cracking, a crossword by noneuclidean with an unorthodox theme. link goes to a solver on crosshare with the clues.

12. japanese braille, a sample puzzle from the international linguistics olympiad. link goes to a pdf containing all of the sample puzzles, where this puzzle is on page 4. note that the pdf version of the puzzle (as opposed to the above image) contains extra information that makes the puzzle easier.

13. the 2023 puzzmo holiday puzzlebook, published by puzzmo. link goes to a pdf containing the above puzzle and so many more. if you like what's inside and you're not already playing puzzmo, now is a great time to hop aboard!

hunt puzzles

14. paint by numbers, designed by brian chen for the 2023 galactic puzzle hunt. link includes an answer checker.

15. extreme anagrams, designed by yannick yao for the 2022 galactic puzzle hunt. the above image is a curated selection from the puzzle that i found the most interesting. link goes to the full puzzle.

16. make your own math quiz, designed by azalea weisblat and josh alman for the 2020 galactic puzzle hunt, which was one of my favorite solving experiences of all time. link goes to the full puzzle, which is interactive.

17. worm search, part of a puzzle designed by adeline wong and thomas gordon for the 17th shard puzzle hunt. note that knowing which puzzle from the hunt contains this subpuzzle is a small spoiler, so if you're sure you want to see the full puzzle, it's here.

games

18. 0123456789, an instructionless puzzle game designed by matrix67 that defies explanation. link goes to itch.io

19. the blot thickens, a puzzle designed by scottg for the 2023 confounding calendar. i previously wrote about it here! link goes to itch.io

20. a level set from INSIGHT (or "Insight"? or "IN?IGHT"? or "IN⸮IGHT"? the name isn't stylized consistently), a game designed by maou. this game is instructionless - your goal is to split each shape into two pieces following some rule. the rule for this level set can be inferred from only the image, but the game expects you to toy around with possibilities to figure out why certain solutions are right and others are wrong. the link goes to the full game on steam, where if you'd like to try that, you can buy it and reach this stage yourself.

21. klifur, a bouldering simulator designed by torfi that's so like and so unlike real climbing. link goes to itch.io

22. frog finder, a cute game designed by poobslag. it got updated with more content since i originally played it! link goes to itch.io

tiny tricksies

23. make oo, a puzzle designed by beekie. link goes to itch.io

24. addition puzzle, designed by beekie for the 2021 confounding calendar. link goes to itch.io

25. snow walk, a gif-based puzzle designed by patrick traynor (the maker of patrick's parabox) for the 2021 confounding calendar. link goes to itch.io

26. ペンギン迷路 (penguin maze), a japanese puzzle designed by qrostar. you don't need to know japanese to solve it - the goal is to place one right arrow (->) in an empty space in the grid such that starting from the marked arrow in the top right and moving in the direction of each arrow you pass eventually leads you to the flag in the bottom. link goes to the full puzzle on their twitter ("""X""")

variety

27. an unusual chess puzzle, originally designed by raymond sullivan in "the chess mysteries of the arabian knights", sourced from this blog post on chess.com. this is not a conventional chess puzzle - the goal is to figure out how this position happened. ie: it's currently someone's turn, and you have to figure out what the board looked like 3 moves ago.

28. five houses puzzle, designed by jack lance. i've embellished the problem statement to make the goal more clear:

there are five houses on a street that all have different prices and heights.

let's say the prices are $1M, $2M, $3M, $4M, and $5M, and the heights are 3m, 3.5m, 4m, 4.5m, and 5m, in some order.

given the following constraints, identify the price and height of each house:

1) The house that's taller than the house that's more expensive than the house that's shorter than the house that's cheaper than the house that's blue is red.

(i came across this from a blog post by jacob cohen of puzzles for progress discussing jack lance's passing. worth a read honestly - jack lance was too good)

29. the cursed dice riddle, designed by dan finkel and presented by ted-ed. link goes to the video, which contains the problem statement and the solution.

30. round 2 of s19e6 of the british quiz show only connect, reformatted as a puzzle. this is honestly worth its own blog post, which i'll make later - for now, you can find the full episode here.

31. last but by far not least, LOK, a very artful puzzle book designed by blaz urban gracer of letibus design. link goes to itch.io

confounding calendar 2025

showy homes

this was a wordle puzzle that turns into a path drawing logic puzzle! the reveal was really nicely done visually and working out what the solution had to be felt tight and well authored. i lacked the general knowledge required to understand the bonus idea, but still felt it was cool and serendipitous that such an idea could be included in this puzzle at all. brilliant

dual threaded

this was a super pretty grid logic puzzle with a minimally illustrated ruleset. i figured out what the rules were trying to tell me and worked out a solution from there. i'm a big fan of puzzles like this where you get to draw on them and your final solution automatically looks really pretty :) i didn't save my solve but suffice to say it looked awesome

tricky tangled train tracks

this one is interesting because at it's core it's basically just a maze, but it's really hard. the game kind of throws you for a loop initially because there's a marker showing the first four spots you're supposed to hit, and the third one is definitely not the one you expect. if you ignore the hint and decide to hit a different third spot, it doesn't work!

from there solving is this weird experience of trying to figure out, with any next move you make, whether the train can actually loop around and hit the spots that you passed by along the way. there's a few really tight turns in the final leg that juuuuuust barely work, it's really flashy

this bubble tea troubles me

there's a bunch of puzzlescript sokoban games in these collections, and i sort of expect many of them not to pique my interest because they're laser focused on the appeal being whatever mechanic they came up with and nothing else. this entry however is different because the theme of it is really striking!

i got stuck in a spot and i personally felt like the hint provided on the page was anti-helpful. the actual aha is quite good! if you happen to be stuck in the spot i was (which, i guess is unlikely since i said at the top of this post that i would be spoiling things), see if you can figure out what the key move is starting from this position:

lessons on strange symbols

i don't really need to say anything about this one, it should be clear what made me remember this after playing through it :)

loopmaker

if torcado makes something, it's basically guaranteed to be technically and visually incredible. it's so in line with them that we got an image puzzle with a full-feature embedded image editor that, unlike any other image editor i've ever used for a puzzle page, is specifically optimized for drawing freehanded lines. insane.

and that's not to mention the actual puzzles, which get pretty tough and gritty! especially the endgame, which is kind of unfathomable.

a short bike

one of those sokoban games where your movement is complete bullshit, but it's super visually striking and i enjoyed figuring out how to get from point a to point b, multiple times. definitely the hardest part is figuring out what to do with the two boxes on the right side of the level - once you have that, reaching the finish from there doesn't require any more difficult tricks.