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 321st lynn 476 240 49ms 23 Oct 2023 322nd MeWhenI 🇻🇦 476 442 55ms 12 Nov 2022 323rd SmartK8 🇨🇿 474 550 510ms 30 Oct 2022 324th janbehrens 🇩🇪 473 338 13ms 28 Oct 2023 325th aksyristos 471 286 17ms 3 hours ago 326th bricknellj 469 287 10ms 15 Mar 2023 327th SirBogman 🇺🇸 467 233 43ms 19 Nov 2023 328th ZakkkkAttackkkk 🇵🇭 465 290 23ms 23 Oct 2023 329th guliyevemil1 🇦🇿 461 636 375ms 3 Feb 2021 330th deflatSOCO 460 293 12ms 5 Jun 2019 331st Bubbler-4 457 238 39ms 16 Dec 2021 332nd bzijlema 🇳🇱 455 296 22ms 26 Jan 2026 333rd MeWhenI 🇻🇦 453 635 412ms 26 Aug 2023 334th stefangimmillaro 452 298 11ms 15 Oct 2023 334th ryyyn 🇺🇸 452 298 31ms 13 Nov 2025 336th MeWhenI 🇻🇦 451 512 40ms 18 Nov 2023 337th MeWhenI 🇻🇦 451 518 504ms 28 Feb 2022 338th MeWhenI 🇻🇦 451 762 24ms 17 Nov 2021 339th 5cw 🇺🇸 446 302 22ms 9 Jul 2025 340th MeWhenI 🇻🇦 446 659 290ms 17 Sep 2021 341st KatieLG 🇬🇧 445 360 15ms 5 Oct 2025 342nd lynn 443 304 20ms 23 Oct 2023 343rd msbranicky 442 600 4,419ms 10 Jan 2025 344th ericlangedijk 🇸🇮 441 591 574ms 23 May 2023 345th lynn 440 292 781ms 17 Feb 2024 346th davecame 440 306 12ms 17 Sep 2025 347th janbehrens 🇩🇪 438 527 37ms 28 Oct 2023 348th tomh1012 438 595 560ms 21 days ago 349th emgordon154 431 331 150ms 6 Sep 2024 350th MeWhenI 🇻🇦 431 606 514ms 2 Jan 2022 351st RaBa21 🇭🇺 429 314 19ms 1 Aug 2025 352nd didion0 🇺🇸 428 374 18ms 29 Apr 2021 352nd Lv0Sys 🇵🇱 428 374 13ms 2 Dec 2025 354th MeWhenI 🇻🇦 428 553 3ms 11 Sep 2022 355th janbehrens 🇩🇪 425 458 4ms 28 Oct 2023 356th jared-hughes 423 378 13ms 11 Sep 2022 357th yuchuehw 422 319 20ms 6 Jan 2024 358th ahmetdemirag 🇨🇾 416 324 12ms 12 Aug 2024 359th dokutan 416 420 3ms 3 Apr 2024 360th helbling 🇨🇭 415 386 13ms 25 Sep 2024 361st MeWhenI 🇻🇦 414 426 206ms 13 Dec 2022 362nd jerrandolph 413 709 334ms 25 Sep 2025 363rd robin-scragg 412 327 22ms 26 Aug 2025 364th Salutations45 410 390 13ms 3 Dec 2024 365th jared-hughes 408 330 21ms 11 Sep 2022 366th retrohun 407 516 4ms 10 Nov 2022 367th Shanethegamer 🇺🇸 406 292 43ms 16 Jan 2025 368th annaproxy 405 333 18ms 17 Sep 2022 369th MattShaile 405 395 12ms 29 Mar 2022 370th MeWhenI 🇻🇦 403 483 4ms 21 Mar 2024 371st blaztoma 🇱🇹 400 337 19ms 26 Dec 2025 372nd janbehrens 🇩🇪 399 338 12ms 28 Oct 2023 373rd roguh 🇬🇹 398 516 2ms 14 Jan 2024 374th AGoyet 397 339 19ms 28 Jul 2022 375th madeforlosers 397 403 22ms 28 Apr 2025 376th Babafaba 396 340 19ms 24 Nov 2025 377th leon-w 395 341 24ms 4 Jan 2019 378th Sp3000 🇦🇺 394 342 18ms 11 May 2021 378th neihousaigaai 394 342 13ms 20 May 2021 378th wh3n3v3r 🇨🇿 394 342 12ms 13 Nov 2024 381st Mabeloid 🇳🇴 394 522 3ms 28 Sep 2024 382nd daedals 393 343 17ms 31 May 2019 383rd coreynash 393 407 15ms 2 Feb 2024 384th KatieLG 🇬🇧 392 344 19ms 2 Oct 2025 384th Pyroan 392 344 17ms 3 Jan 2026 386th Shanethegamer 🇺🇸 391 278 4ms 27 May 2024 387th Shanethegamer 🇺🇸 391 352 295ms 27 Oct 2023 388th retrohun 391 590 58ms 29 Oct 2019 389th CaedenHarper 🇨🇦 391 750 327ms 12 Nov 2025 390th CaedenHarper 🇨🇦 390 668 530ms 21 Oct 2025 391st abailey2020 🇺🇸 389 346 19ms 13 Dec 2020 392nd MeWhenI 🇻🇦 389 529 2ms 7 May 2023 393rd Babafaba 383 336 530ms 24 Nov 2025 394th olleicua 🇺🇸 381 311 38ms 31 Oct 2025 395th inventshah 378 356 31ms 15 Nov 2022 396th jared-hughes 377 463 2ms 11 Sep 2022 397th MeWhenI 🇻🇦 374 711 6ms 29 Mar 2024 398th KatieLG 🇬🇧 369 738 264ms 11 Jun 2021 399th cmdrsabre 360 806 214ms 6 Feb 2020 400th AlephSquirrel 359 358 813ms 21 Jan 2024 First Prev 321–400 of 570 Next Last
