The Gray Code Decoder and Gray Code Encoder holes will go live in approximately 6 days. Why not try and solve them ahead of time?
Rule 110 in all languages in bytes. 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 Bytes Time Submitted 801st Kibble 485 149 13ms 11 Jul 2020 801st Maznek 485 149 14ms 12 Jun 2023 803rd JDiLenarda 🇫🇷 485 167 411ms 20 Nov 2023 804th boxjelly 484 118 39ms 12 Feb 2021 805th msbranicky 484 186 11ms 3 Oct 2024 806th rak1507 🇬🇧 483 167 170ms 13 Feb 2021 807th yoshykai 483 228 526ms 8 Apr 2025 808th rvdnieuwendijk 🇳🇱 482 134 284ms 23 Jul 2020 808th Shanethegamer 🇺🇸 482 134 271ms 27 Apr 2022 810th Y0UR-U5ERNAME 482 142 12ms 4 Jul 2022 811th DrPiranoid 482 166 6ms 14 Oct 2022 812th Attero 🇸🇪 481 229 439ms 15 May 2020 813th CaedenHarper 🇨🇦 481 267 305ms 3 Nov 2025 814th guliyevemil1 🇦🇿 480 168 146ms 16 Apr 2020 815th Jviscus1 479 143 41ms 24 Apr 2020 815th MaxElf999 479 143 12ms 3 Oct 2022 815th PaulMWeiser 479 143 417ms 4 Mar 2023 815th rsgray 479 143 11ms 24 Jan 2024 815th itljan30 479 143 11ms 30 Jan 2025 820th gigaprofisi 🇺🇸 479 151 11ms 17 Nov 2025 821st MeWhenI 🇻🇦 478 155 106ms 18 Nov 2023 822nd snoozingnewt 🇨🇦 478 170 90ms 22 Oct 2025 823rd Skepfyr 478 206 211ms 4 Jan 2020 824th jwhear 🇺🇸 478 292 1,841ms 1 Oct 2024 825th hellwue 476 144 15ms 25 Jun 2024 825th wh3n3v3r 🇨🇿 476 144 17ms 20 Nov 2024 825th JunkIce 476 144 18ms 24 Jan 2025 828th raphaelimahorn 476 152 12ms 2 Oct 2021 828th ShiraJoseph 🇺🇸 476 152 15ms 15 Oct 2023 830th Yewzir 🇧🇪 476 204 510ms 27 Jan 2024 831st charliegaming 473 153 13ms 4 Oct 2023 832nd pandapawskat 473 169 6ms 1 Sep 2021 833rd fgrosshans 🇫🇷 472 145 19ms 10 Jan 2022 833rd SniperSmiley 🇺🇸 472 145 22ms 24 Jun 2022 833rd SirFireball3521 472 145 12ms 4 Feb 2023 836th dloscutoff 471 133 321ms 27 Nov 2018 837th scpchicken 🇵🇼 471 214 87ms 18 Apr 2023 838th Quadruplay 470 154 12ms 12 Jul 2025 839th msbranicky 469 140 562ms 3 Oct 2024 840th ludwig-n 469 146 11ms 6 Apr 2021 840th inverseLorentz 🇦🇺 469 146 348ms 29 Apr 2024 840th luuumine 🇫🇷 469 146 11ms 17 Oct 2025 843rd roguh 🇬🇹 469 172 154ms 18 Jan 2024 844th citsur 468 171 6ms 17 Jun 2019 845th aaronze 🇦🇺 467 155 16ms 27 Apr 2021 846th MeWhenI 🇻🇦 467 226 45ms 29 Aug 2024 847th Yewzir 🇧🇪 467 299 1,792ms 14 Nov 2025 848th nooberitess 466 147 25ms 22 May 2025 849th RussellEmerine 466 173 139ms 10 Apr 2020 850th rambox11 465 172 6ms 16 Mar 2019 851st yokasuretsu 464 123 41ms 11 Jul 2018 852nd guliyevemil1 🇦🇿 463 148 10ms 16 Apr 2020 852nd andre-lameirinhas 🇵🇹 463 148 16ms 3 Oct 2020 852nd Emutis 🇱🇹 463 148 11ms 9 Nov 2025 855th KatieLG 🇬🇧 462 128 1,719ms 20 Oct 2021 856th MeWhenI 🇻🇦 461 193 8ms 1 Oct 2022 857th tatzyr 🇯🇵 460 124 68ms 26 Dec 2024 858th Anonymousellama21 460 149 11ms 7 Mar 2024 859th ibexq 460 174 6ms 6 Mar 2023 860th MeWhenI 🇻🇦 460 286 62ms 25 Jun 2022 861st boxjelly 459 280 328ms 10 Feb 2021 862nd squadb3 458 158 14ms 10 Oct 2019 862nd unfinishedprogram 458 158 13ms 27 Oct 2023 864th zdzc 457 150 11ms 25 Apr 2019 865th JunkIce 456 144 520ms 24 Jan 2025 866th the-zammers 456 177 141ms 15 Dec 2023 867th matanshavit 453 151 15ms 5 May 2020 867th AforAmpere 453 151 13ms 21 Feb 2021 867th aglahir1 453 151 19ms 20 Jul 2022 867th mikehanus 453 151 32ms 21 Nov 2023 867th rollershutter 453 151 11ms 6 Oct 2025 872nd Meowsan91 🇨🇿 453 179 408ms 21 Nov 2021 873rd Alex-x90 🇺🇸 453 243 434ms 17 Mar 2024 874th msbranicky 452 233 3ms 3 Oct 2024 875th Starwort 🇬🇧 451 152 11ms 5 Apr 2019 875th ay2718 451 152 11ms 8 Aug 2019 877th edsrzf 🇳🇿 450 164 6ms 6 Oct 2024 878th msbranicky 449 181 115ms 17 Aug 2023 879th JGDoerrer 449 219 172ms 18 Jan 2022 880th h3ra993huskp 🇯🇵 449 245 490ms 30 Nov 2025 First Prev 801–880 of 1,669 Next Last