The Gray Code Decoder and Gray Code Encoder holes will go live in approximately 2 days. 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 561st MeWhenI 🇻🇦 456 146 1,013ms 15 Sep 2025 562nd MeWhenI 🇻🇦 456 249 1,340ms 30 Apr 2023 563rd MeWhenI 🇻🇦 455 149 571ms 24 May 2024 564th roguh 🇬🇹 454 213 2ms 15 Jan 2024 565th msbranicky 454 297 221ms 16 Oct 2023 566th StefanHabel 🇨🇦 452 165 11ms 25 days ago 567th Michiocre 451 187 11ms 20 Feb 2024 568th Phil-RGOMEGA 451 234 2ms 23 Aug 2023 569th CedricGebistorf 449 166 11ms 4 May 2023 569th ahmetdemirag 🇨🇾 449 166 121ms 6 Feb 2025 571st nstearns96 🇬🇧 447 167 11ms 22 Jan 2023 571st maxgodfrey2004 🇨🇦 447 167 20ms 5 Jan 2025 573rd LuisGoncalves05 🇵🇹 444 168 17ms 13 Jul 2025 573rd te-chnical 444 168 16ms 17 Jan 2026 575th mrxz 🇳🇱 444 190 11ms 13 Aug 2024 576th bac0id 443 291 398ms 27 Jun 2024 577th emgordon154 443 431 23ms 7 Aug 2025 578th Maznek 442 191 18ms 17 Jun 2023 579th aditsu 441 192 2,766ms 20 Aug 2025 580th roguh 🇬🇹 439 170 12ms 15 Jan 2024 581st two-bad 🇬🇧 439 192 14ms 25 Feb 2024 582nd msbranicky 439 262 4ms 20 Jan 2025 583rd bac0id 433 223 2ms 27 Jun 2024 584th Salutations45 432 182 4ms 12 Jan 2025 585th jerrandolph 430 312 313ms 22 Oct 2023 586th Haksell 🇦🇶 429 131 35ms 22 Feb 2023 587th za3k 429 174 12ms 31 Dec 2022 588th JDiLenarda 🇫🇷 428 265 1,866ms 2 Dec 2023 589th dokutan 427 216 9ms 27 Dec 2025 590th mossprescott 426 175 13ms 15 Jan 2023 591st madeforlosers 426 198 15ms 28 Apr 2025 592nd MeWhenI 🇻🇦 426 221 692ms 22 Dec 2022 593rd MeWhenI 🇻🇦 425 185 4ms 10 Feb 2023 594th adamnielson42 🇺🇸 424 176 11ms 25 Apr 2023 595th h3ra993huskp 🇯🇵 424 304 493ms 30 Nov 2025 596th ovs-code 🇩🇪 423 218 19ms 27 Sep 2024 597th MeWhenI 🇻🇦 423 451 49ms 26 Aug 2023 598th neihousaigaai 421 177 11ms 28 May 2025 599th eddiesmithxyz 421 290 134ms 6 Jan 2023 600th CatsAreFluffy 419 178 12ms 2 Sep 2024 601st roguh 🇬🇹 418 162 608ms 23 Jan 2024 602nd LukeBridges 🇬🇧 416 203 11ms 14 Oct 2024 603rd mrmena 🇦🇺 415 269 42ms 16 Apr 2024 604th Bmrl7 414 180 10ms 26 Dec 2025 605th Szum123321 🇵🇱 413 234 2ms 10 Dec 2023 606th janbehrens 🇩🇪 410 204 395ms 11 May 2023 607th weliveinhell 🇭🇹 410 206 9ms 20 Jun 2025 608th madex 🇩🇪 408 183 13ms 2 Jun 2023 609th roguh 🇬🇹 407 207 161ms 27 Jan 2024 610th b10011 🇫🇮 405 184 13ms 16 Jan 2023 610th quimey 405 184 17ms 9 Jun 2023 612th emgordon154 404 139 39ms 2 Aug 2024 613th TechNolaByte 404 209 14ms 22 Dec 2022 613th BalaM314 404 209 10ms 4 Feb 2025 615th msbranicky 404 244 95ms 16 Aug 2023 616th JunkIce 403 185 19ms 13 Feb 2025 617th galloj 🇨🇿 397 188 14ms 24 Feb 2023 618th MeWhenI 🇻🇦 395 164 4ms 15 Apr 2023 619th simon-thornton_pace 395 189 19ms 3 Aug 2023 620th commandz0 🇺🇸 391 173 725ms 1 Sep 2025 621st SniperSmiley 🇺🇸 390 191 18ms 28 Dec 2022 622nd tomh1012 389 215 417ms 17 Nov 2025 623rd RaBa21 🇭🇺 388 192 19ms 19 Jul 2025 624th dokutan 388 217 123ms 26 Jan 2026 625th itljan30 386 193 17ms 28 Jan 2025 626th alicethecatwhisperermeow 385 217 486ms 7 Aug 2024 627th moustave 384 194 11ms 28 Nov 2024 628th Florian-Mt 382 195 18ms 12 Jul 2024 629th stellartux 380 179 359ms 1 Jan 2024 630th IISResetMe 380 183 427ms 14 Jul 2024 631st guilhem-roy 🇫🇷 380 196 16ms 6 Feb 2023 632nd dtaylor0 379 197 20ms 25 Dec 2022 632nd msbranicky 379 197 17ms 27 Jul 2023 632nd sciencedjinn 379 197 11ms 8 Nov 2024 635th mdnestor 377 198 13ms 23 Dec 2022 635th thomasklunker 377 198 12ms 2 Feb 2023 635th RYNO8 377 198 19ms 11 Apr 2023 638th c0d3-4-F00d 🇩🇪 376 257 2ms 9 Jan 2023 639th Matter1024 🇮🇳 375 199 17ms 18 Jan 2026 640th yoshykai 374 344 405ms 28 Mar 2025 First Prev 561–640 of 857 Next Last