The Gray Code Decoder and Gray Code Encoder holes will go live in approximately 30 hours. Why not try and solve them ahead of time?
Rule 110 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 721st Salutations45 510 138 11ms 30 Dec 2024 722nd hemphen 510 155 395ms 29 Aug 2022 723rd mokymok 🇺🇸 508 114 19ms 11 Oct 2021 723rd hiichbindermax 508 114 11ms 17 Sep 2024 725th aksyristos 507 152 7ms 30 Jan 2023 726th yzhs 🇩🇪 507 155 130ms 26 Jul 2021 727th Waffle3z 506 107 38ms 22 Jan 2021 727th KatieLG 🇬🇧 506 107 44ms 11 Apr 2022 729th KatieLG 🇬🇧 506 209 132ms 15 Jan 2023 730th Shanethegamer 🇺🇸 505 115 559ms 2 Jul 2021 731st Shanethegamer 🇺🇸 505 205 54ms 20 Oct 2024 732nd giacomogallina 504 115 23ms 14 Jun 2019 732nd cellobix 504 115 18ms 15 Aug 2019 732nd dzhang314 504 115 17ms 15 Aug 2019 732nd rollershutter 504 115 19ms 26 Nov 2023 732nd 1231234md5 🇨🇳 504 115 18ms 25 Jan 2024 732nd CutSandstone 504 115 16ms 5 Jul 2024 732nd KasperKivimaeki 🇫🇮 504 115 14ms 7 Jul 2025 739th boxjelly 504 153 6ms 17 Feb 2021 739th janbehrens 🇩🇪 504 153 6ms 25 Oct 2021 741st boxjelly 504 156 147ms 27 Jan 2021 742nd MeWhenI 🇻🇦 504 251 304ms 10 Feb 2023 743rd MeWhenI 🇻🇦 504 273 1,771ms 7 Nov 2025 744th ArmaanAS 502 140 14ms 5 Feb 2021 744th raphaelimahorn 502 140 12ms 2 Oct 2021 744th ShiraJoseph 🇺🇸 502 140 15ms 15 Oct 2023 747th snoozingnewt 🇨🇦 502 158 90ms 22 Oct 2025 748th MeWhenI 🇻🇦 502 192 134ms 11 Sep 2022 749th madex 🇩🇪 501 154 6ms 16 Jan 2021 749th elttil 501 154 6ms 28 Jan 2026 751st NicoAdams 499 116 11ms 22 Nov 2021 751st NerdyMcNerd42 499 116 11ms 27 Oct 2022 751st jtaxen 499 116 18ms 21 Apr 2024 754th charliegaming 499 141 13ms 4 Oct 2023 754th dokutan 499 141 12ms 5 Jun 2025 756th n1LS 497 109 42ms 27 Sep 2019 757th Protothor 492 143 15ms 16 days ago 758th sambirnbaum1 491 118 12ms 29 Oct 2019 758th boxjelly 491 118 13ms 17 Jan 2021 758th andrewjc2000 491 118 11ms 8 Mar 2025 758th StefanHabel 🇨🇦 491 118 11ms 21 days ago 762nd JDiLenarda 🇫🇷 491 161 411ms 20 Nov 2023 763rd Dominoscompute 490 208 39ms 20 Apr 2023 764th Attero 🇸🇪 490 217 439ms 15 May 2020 765th msbranicky 489 197 133ms 3 Oct 2024 766th TheZwierzLF 🇵🇱 488 111 88ms 5 Jan 2026 767th alemelis 488 119 237ms 29 Sep 2024 768th quimey 487 119 18ms 23 Aug 2023 768th alemelis 487 119 11ms 14 Sep 2024 770th janbehrens 🇩🇪 487 148 117ms 5 Aug 2021 771st janbehrens 🇩🇪 486 148 7ms 3 Jul 2023 772nd dokutan 486 219 383ms 24 Sep 2025 773rd Aurel300 🇨🇭 484 199 174ms 20 Jun 2024 774th knutae 🇳🇴 483 120 11ms 3 Dec 2021 774th adamnielson42 🇺🇸 483 120 220ms 4 May 2023 776th LukeBridges 🇬🇧 482 146 12ms 23 May 2023 777th retrohun 482 160 6ms 20 Jun 2019 778th roavin 482 164 374ms 8 Jul 2022 779th dokutan 482 192 6ms 28 Sep 2024 780th Skepfyr 482 200 216ms 4 Jan 2020 781st retrohun 481 102 10ms 1 Jan 2023 782nd neel11235813 479 113 43ms 17 Mar 2023 783rd Indivicivet 479 121 17ms 22 Oct 2021 783rd Bonjour27891 🇻🇳 479 121 15ms 13 Mar 2022 783rd FortuiteMan 🇫🇷 479 121 19ms 17 Sep 2023 786th ei14 479 161 6ms 9 May 2024 787th msbranicky 479 184 11ms 3 Oct 2024 788th IISResetMe 478 131 466ms 9 Jan 2026 789th elisherer 🇮🇱 478 147 16ms 13 Apr 2019 789th Kibble 478 147 13ms 11 Jul 2020 789th Maznek 478 147 14ms 12 Jun 2023 792nd CaedenHarper 🇨🇦 478 265 305ms 3 Nov 2025 793rd rak1507 🇬🇧 477 165 170ms 13 Feb 2021 793rd the-zammers 477 165 141ms 15 Dec 2023 795th orthoplex 🇨🇽 476 331 25ms 9 Jun 2024 796th AGoyet 475 122 13ms 16 Jul 2022 796th GodlyProgrammer1 475 122 12ms 21 Nov 2025 798th Shanethegamer 🇺🇸 475 132 271ms 27 Apr 2022 799th guliyevemil1 🇦🇿 474 166 146ms 16 Apr 2020 800th jwhear 🇺🇸 474 290 1,841ms 1 Oct 2024 First Prev 721–800 of 1,659 Next Last
