The Gray Code Decoder and Gray Code Encoder holes will go live in approximately 25 hours. Why not try and solve them ahead of time?
Game of Life 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 641st yoshykai 374 344 405ms 28 Mar 2025 642nd MeWhenI 🇻🇦 372 189 156ms 3 Aug 2024 643rd cbrt-x 372 346 400ms 14 Sep 2023 644th rsgray 371 201 11ms 22 Jan 2024 645th aaronze 🇦🇺 370 152 36ms 21 Sep 2023 646th zakariamouhid 370 228 10ms 4 Jun 2023 646th stefangabos 🇷🇴 370 228 11ms 6 Sep 2023 648th SirFireball3521 369 202 18ms 3 Mar 2023 649th Andriamanitra 🇫🇮 367 153 39ms 17 Apr 2023 650th JunkIce 366 185 411ms 13 Feb 2025 651st msbranicky 365 232 2,548ms 11 Jan 2025 652nd Schreipfelerer 359 208 18ms 11 Sep 2024 653rd weliveinhell 🇭🇹 358 270 2ms 21 Sep 2023 654th DialFrost 🇸🇬 357 209 13ms 3 Aug 2024 655th KatieLG 🇬🇧 357 218 1,390ms 28 Dec 2022 656th Adix-null 🇱🇹 357 234 424ms 12 Jan 2023 657th bac0id 356 235 430ms 27 Jun 2024 658th Stockoh 🇫🇷 355 210 19ms 17 Nov 2024 659th roupiq 🇵🇱 355 332 441ms 18 Apr 2024 660th kimbo 🇺🇸 355 378 293ms 31 Dec 2022 661st a6166231 🇨🇳 353 239 10ms 19 May 2025 662nd YAJUE114514 352 212 10ms 12 Dec 2025 663rd fynnkroeger 350 213 21ms 15 Apr 2023 664th MeWhenI 🇻🇦 349 264 20ms 25 Dec 2022 665th amollberg 🇸🇪 348 214 10ms 14 Jan 2024 665th TheZwierzLF 🇵🇱 348 214 95ms 2 Jun 2025 667th knutae 🇳🇴 347 215 16ms 14 Nov 2023 668th MeWhenI 🇻🇦 346 243 228ms 28 Apr 2023 669th ShiraJoseph 🇺🇸 346 244 12ms 21 Jul 2023 670th msbranicky 346 305 2ms 19 Oct 2023 671st skaravind 345 216 11ms 19 Jan 2026 672nd msbranicky 344 197 802ms 17 Jan 2024 673rd ValentinCassayre 344 217 20ms 17 Oct 2023 673rd piano-miles 344 217 12ms 6 Sep 2024 675th blaztoma 🇱🇹 343 117 33ms 3 Jan 2026 676th gigaprofisi 🇺🇸 341 247 288ms 6 Nov 2025 677th msbranicky 340 274 200ms 1 Jan 2024 678th KatieLG 🇬🇧 339 396 298ms 13 Aug 2023 679th snoozingnewt 🇨🇦 338 249 127ms 14 Feb 2024 680th amazingalek 🇳🇴 336 249 413ms 21 Jan 2026 681st violeta-desantis 335 288 2ms 2 Oct 2023 682nd ravnskjaer 🇩🇰 335 384 455ms 15 Dec 2025 683rd TheZwierzLF 🇵🇱 334 203 952ms 22 Nov 2025 684th luuumine 🇫🇷 333 224 1,733ms 27 Oct 2025 685th CaedenHarper 🇨🇦 333 253 317ms 11 Aug 2025 686th mbittner20 331 225 12ms 27 May 2023 686th smilesformiles3 331 225 20ms 14 Jun 2025 688th rifatx 331 253 467ms 9 Jul 2024 689th dokutan 330 170 40ms 18 Apr 2025 690th tomh1012 330 226 18ms 25 Feb 2026 691st jhpaques 🇫🇷 327 228 18ms 18 Jan 2023 691st Wildst 327 228 11ms 7 Jul 2023 693rd RandGuy 324 230 11ms 26 Jan 2024 694th MaxElf999 323 231 18ms 9 Jan 2023 694th kistlerf 🇨🇭 323 231 19ms 19 May 2025 696th jacekwladzinski 320 233 17ms 4 Oct 2025 697th 5cw 🇺🇸 319 264 318ms 22 Apr 2023 698th dranjohn 315 237 19ms 16 Sep 2023 699th lhulinsky 313 238 18ms 21 Oct 2024 700th haighd 313 315 89ms 1 Jan 2023 701st lomarbrick 312 239 17ms 19 May 2023 702nd zwxzwxzwx21 307 243 20ms 30 Jan 2024 703rd bogosorter 306 244 10ms 13 Jul 2025 704th Lv0Sys 🇵🇱 306 275 137ms 11 Dec 2025 705th perlebach 🇨🇿 306 277 2,726ms 13 Jun 2025 706th dokutan 305 223 745ms 12 Apr 2024 707th lcubelongren 304 245 10ms 16 Feb 2024 708th bidger 304 423 397ms 23 Dec 2022 709th msbranicky 303 224 164ms 16 Jan 2024 710th celiendonze 🇨🇭 303 246 12ms 27 Jun 2023 710th jtaxen 303 246 17ms 26 Apr 2024 712th eclyptox 302 264 6ms 9 Oct 2024 713th msbranicky 302 407 121ms 27 Dec 2023 714th myleopard 299 249 11ms 22 Dec 2022 715th Jandoife 296 326 2ms 24 Dec 2022 716th JRaspass 🇬🇧 295 219 4ms 20 Feb 2023 717th postie77 293 285 416ms 30 May 2023 718th roupiq 🇵🇱 288 335 2ms 25 Feb 2024 719th jacobly0 🇺🇸 286 294 176ms 4 Sep 2023 720th msbranicky 285 295 339ms 13 Aug 2023 First Prev 641–720 of 858 Next Last