The Gray Code Decoder and Gray Code Encoder holes will go live in approximately 4 days. Why not try and solve them ahead of time?
Poker in all languages in chars. Achievements Cheevos Holes Languages Medals Miscellaneous All Holes 12 Days of Christmas 24 Game 99 Bottles of Beer Abundant Numbers Abundant Numbers (Long) Arabic to Roman Arithmetic Numbers Arrows Ascending Primes ASCII Table Billiards brainfuck Calendar Card Number Validation Catalan Numbers Catalan’s Constant Christmas Trees Collatz Continued Fractions CSS Colors Cubes Day of Week DFA Simulator Diamonds Divisors Emirp Numbers Emirp Numbers (Long) Emojify Evil Numbers Evil Numbers (Long) Factorial Factorisation Farey Sequence Fibonacci Fizz Buzz Foo Fizz Buzz Bar Forsyth–Edwards Notation Fractions Game of Life Gijswijt’s Sequence Happy Numbers Happy Numbers (Long) Hexdump Hilbert Curve Intersection Inventory Sequence ISBN Jacobi Symbol Kaprekar Numbers Kolakoski Constant Kolakoski Sequence Leap Years Levenshtein Distance Leyland Numbers ln 2 Look and Say Lucky Numbers Lucky Tickets Mahjong Mandelbrot Maze Medal Tally Minesweeper Morse Decoder Morse Encoder Multitap Input Musical Chords N Queens Niven Numbers Niven Numbers (Long) Number Spiral Odious Numbers Odious Numbers (Long) Ordinal Numbers PalindromemordnilaP Pangram Grep Partition Numbers Pascal’s Triangle Pernicious Numbers Pernicious Numbers (Long) Poker Polyominoes Prime Numbers Prime Numbers (Long) Proximity Grid QR Decoder Quine Recamán Repeating Decimals Reverse Polish Notation Reversi Rijndael S-box Rock-paper-scissors-Spock-lizard Roman to Arabic ROT13 Rule 110 Scrambled Sort Set Seven Segment SI Units Sierpiński Triangle Smith Numbers Spelling Numbers Star Wars GPT Star Wars Opening Crawl Sudoku Sudoku (Fill-in) Ten-pin Bowling Tic-tac-toe Time Distance Tongue-twisters Topological Sort Tower of Hanoi Transpose Sentence Trinomial Triangle United States Vampire Numbers Van Eck Sequence Zeckendorf Representation Zodiac Signs γ λ π τ φ √2 𝑒 Alphabetic Numbers Apéry’s Constant Binary Lambda Calculus Connect Four Crossword CSS Colors (Inverse) CSS Grid Ellipse Perimeters Flags Floyd-Steinberg Dithering Gray Code Decoder Gray Code Encoder Hexagonal Spiral Highly Composite Numbers NFA Simulator Numbrix Odd Polyomino Tiling p-adic Expansion Polygon Triangulations QR Encoder Quadratic Formula Rectangle Fill Semiprime Numbers Smooth Numbers Snake Sphenic Numbers Taxicab Numbers Turtle Tutorial All Languages ><> ALGOL 68 ArkScript Assembly AWK Bash BASIC Berry brainfuck C C# C++ Civet Clojure COBOL Coconut Common Lisp Crystal D Dart Elixir Erlang F# Factor Forth Fortran Gleam Go GolfScript Groovy Haskell Hexagony J Janet Java JavaScript jq Julia K Kotlin Lua Nim OCaml Pascal Perl PHP PowerShell Prolog Python R Raku Rockstar Ruby Rust Scheme sed SQL Swift Tcl TeX V VimL Wren Zig 05AB1E APL Arturo Befunge BQN CJam CoffeeScript Egel Fennel Harbour Hare Haxe Hush Hy iogii Knight Lily Luau Odin Picat Qore Racket Rebol Rexx Scala Squirrel Stax Uiua Umka Vala Vyxal Bytes Chars Scoring Bytes Chars Language All ><> ALGOL 68 ArkScript Assembly AWK Bash BASIC Berry brainfuck C C# C++ Civet Clojure COBOL Coconut Common Lisp Crystal D Dart Elixir Erlang F# Factor Forth Fortran Gleam Go GolfScript Groovy Haskell Hexagony J Janet Java JavaScript jq Julia K Kotlin Lua Nim OCaml Pascal Perl PHP PowerShell Prolog Python R Raku Rockstar Ruby Rust Scheme sed SQL Swift Tcl TeX V VimL Wren Zig Experimental Language 05AB1E APL Arturo Befunge BQN CJam CoffeeScript Egel Fennel Harbour Hare Haxe Hush Hy iogii Knight Lily Luau Odin Picat Qore Racket Rebol Rexx Scala Squirrel Stax Uiua Umka Vala Vyxal Hole All 12 Days of Christmas 24 Game 99 Bottles of Beer Abundant Numbers Abundant Numbers (Long) Arabic to Roman Arithmetic Numbers Arrows Ascending Primes ASCII Table Billiards brainfuck Calendar Card Number Validation Catalan Numbers Catalan’s Constant Christmas Trees Collatz Continued Fractions CSS Colors Cubes Day of Week DFA Simulator Diamonds Divisors Emirp Numbers Emirp Numbers (Long) Emojify Evil Numbers Evil Numbers (Long) Factorial Factorisation Farey Sequence Fibonacci Fizz Buzz Foo Fizz Buzz Bar Forsyth–Edwards Notation Fractions Game of Life Gijswijt’s Sequence Happy Numbers Happy Numbers (Long) Hexdump Hilbert Curve Intersection Inventory Sequence ISBN Jacobi Symbol Kaprekar Numbers Kolakoski Constant Kolakoski Sequence Leap Years Levenshtein Distance Leyland Numbers ln 2 Look and Say Lucky Numbers Lucky Tickets Mahjong Mandelbrot Maze Medal Tally Minesweeper Morse Decoder Morse Encoder Multitap Input Musical Chords N Queens Niven Numbers Niven Numbers (Long) Number Spiral Odious Numbers Odious Numbers (Long) Ordinal Numbers PalindromemordnilaP Pangram Grep Partition Numbers Pascal’s Triangle Pernicious Numbers Pernicious Numbers (Long) Poker Polyominoes Prime Numbers Prime Numbers (Long) Proximity Grid QR Decoder Quine Recamán Repeating Decimals Reverse Polish Notation Reversi Rijndael S-box Rock-paper-scissors-Spock-lizard Roman to Arabic ROT13 Rule 110 Scrambled Sort Set Seven Segment SI Units Sierpiński Triangle Smith Numbers Spelling Numbers Star Wars GPT Star Wars Opening Crawl Sudoku Sudoku (Fill-in) Ten-pin Bowling Tic-tac-toe Time Distance Tongue-twisters Topological Sort Tower of Hanoi Transpose Sentence Trinomial Triangle United States Vampire Numbers Van Eck Sequence Zeckendorf Representation Zodiac Signs γ λ π τ φ √2 𝑒 Experimental Hole Alphabetic Numbers Apéry’s Constant Binary Lambda Calculus Connect Four Crossword CSS Colors (Inverse) CSS Grid Ellipse Perimeters Flags Floyd-Steinberg Dithering Gray Code Decoder Gray Code Encoder Hexagonal Spiral Highly Composite Numbers NFA Simulator Numbrix Odd Polyomino Tiling p-adic Expansion Polygon Triangulations QR Encoder Quadratic Formula Rectangle Fill Semiprime Numbers Smooth Numbers Snake Sphenic Numbers Taxicab Numbers Turtle Tutorial # Golfer Points Chars Time Submitted 401st AlephSquirrel 359 375 23ms 3 Jan 2023 401st Lv0Sys 🇵🇱 359 375 21ms 2 Dec 2025 403rd janbehrens 🇩🇪 358 335 795ms 28 Oct 2023 404th jared-hughes 357 332 38ms 3 Jan 2023 405th KatieLG 🇬🇧 357 360 496ms 6 Oct 2025 406th suwat513 356 378 23ms 28 Sep 2022 407th zakariamouhid 356 450 16ms 8 Jun 2023 408th JOrE20 355 379 12ms 8 Dec 2025 409th BambooleanLogic 🇸🇪 352 455 14ms 14 Nov 2022 410th FortuiteMan 🇫🇷 351 384 18ms 1 Jan 2026 411th alexkunin 346 462 15ms 4 Jul 2019 412th pkasting 345 595 2ms 8 Sep 2020 413th cure-honey 🇯🇵 344 1,088 50ms 19 May 2020 414th Maashau 343 600 2ms 2 Dec 2025 415th KatieLG 🇬🇧 343 853 390ms 11 Jan 2023 416th scpchicken 🇵🇼 341 395 13ms 28 Apr 2022 417th hamhub7 341 763 545ms 16 Aug 2022 418th Lv0Sys 🇵🇱 340 349 51ms 2 Dec 2025 419th nephila-nacrea 🇬🇧 339 575 4ms 22 Dec 2020 420th qpwoeirut 337 400 16ms 9 Nov 2025 421st fitzdotlol 🇺🇸 335 354 38ms 27 Jan 2022 422nd junkondo-jp 335 477 15ms 27 Jun 2024 423rd knutae 🇳🇴 333 404 23ms 4 Oct 2022 424th Yewzir 🇧🇪 333 405 19ms 5 Jun 2024 425th KatieLG 🇬🇧 333 657 2,015ms 25 Apr 2021 426th KatieLG 🇬🇧 333 883 309ms 11 Jun 2021 427th andrewjc2000 332 406 18ms 7 Jul 2025 428th RYNO8 330 408 12ms 22 Aug 2023 429th JRaspass 🇬🇧 329 313 239ms 4 Dec 2020 430th CaedenHarper 🇨🇦 328 432 2,142ms 6 Nov 2025 431st CaedenHarper 🇨🇦 327 490 13ms 29 Aug 2025 432nd orthoplex 🇨🇽 325 335 43ms 8 Oct 2020 433rd evan18c 325 414 14ms 27 Apr 2025 434th commandz0 🇺🇸 325 415 11ms 3 Nov 2022 435th CaedenHarper 🇨🇦 325 871 805ms 7 Oct 2025 436th CaedenHarper 🇨🇦 324 397 684ms 6 Nov 2025 437th InigoK 🇺🇸 324 416 17ms 23 Aug 2025 438th RockOfStone 322 543 2ms 9 Mar 2024 439th Lv0Sys 🇵🇱 321 373 849ms 2 Dec 2025 440th MeWhenI 🇻🇦 321 442 2,051ms 15 Sep 2025 441st guilhem-roy 🇫🇷 320 421 30ms 3 Mar 2022 441st nullie 320 421 18ms 8 Oct 2024 441st CaedenHarper 🇨🇦 320 421 17ms 6 Nov 2025 444th Schmitt-Very-Cool 320 883 810ms 3 Oct 2025 445th bknower 319 422 13ms 30 Jun 2025 446th commandz0 🇺🇸 317 405 942ms 1 Sep 2025 447th SpareManiKatti 316 507 19ms 19 Apr 2022 448th TimCurwick 🇺🇸 315 437 288ms 26 Jan 2021 449th gnlow 🇰🇷 315 508 16ms 14 Feb 2021 450th ShiraJoseph 🇺🇸 314 510 17ms 20 Jan 2023 451st adamnielson42 🇺🇸 313 431 11ms 3 Apr 2023 452nd za3k 310 435 11ms 16 Oct 2022 453rd jchitel 310 517 17ms 25 Sep 2020 454th marcin7Cd 309 436 22ms 14 Dec 2020 455th wrhm 305 442 17ms 14 Dec 2020 456th Bonjour27891 🇻🇳 303 444 19ms 19 Mar 2022 457th two-bad 🇬🇧 303 528 13ms 25 Feb 2024 458th AstroOrbis 302 446 10ms 15 Feb 2026 459th MeWhenI 🇻🇦 300 399 744ms 15 Feb 2023 460th Argeento 🇵🇱 300 533 16ms 25 Aug 2023 461st KatieLG 🇬🇧 300 836 7ms 7 Feb 2023 462nd alangodfrey 299 451 11ms 31 Jan 2019 462nd CedricGebistorf 299 451 11ms 4 May 2023 464th dokutan 298 402 883ms 20 May 2024 465th MeWhenI 🇻🇦 298 479 205ms 25 Oct 2024 466th roguh 🇬🇹 297 453 13ms 11 Jan 2024 467th thomasklunker 297 454 18ms 3 Feb 2023 468th Natanaelel 🇸🇪 296 401 39ms 22 Sep 2022 469th DialFrost 🇸🇬 295 406 975ms 24 May 2024 470th jfallon1997 295 457 11ms 17 Aug 2022 471st bidger 295 957 712ms 29 Oct 2022 472nd sambirnbaum1 294 458 14ms 6 Sep 2019 472nd croc54 294 458 21ms 4 Feb 2025 472nd Emutis 🇱🇹 294 458 12ms 6 Sep 2025 475th KatieLG 🇬🇧 291 988 417ms 23 May 2021 476th rsgray 290 465 16ms 10 Feb 2024 477th cros107 🇦🇺 288 468 21ms 8 Feb 2025 478th jtaxen 283 476 21ms 23 May 2024 479th KatieLG 🇬🇧 282 1,001 700ms 24 Jan 2023 480th TheZwierzLF 🇵🇱 281 457 1,023ms 13 Dec 2025 First Prev 401–480 of 570 Next Last
