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 241st Irratix 🇳🇱 867 112 69ms 15 Dec 2022 242nd stefangimmillaro 867 129 123ms 23 Sep 2024 243rd SirBogman 🇺🇸 865 66 39ms 28 Nov 2022 243rd emgordon154 865 66 34ms 3 Aug 2025 245th prplz 🇦🇺 860 93 6ms 5 Apr 2019 245th nwellnhof 🇩🇪 860 93 7ms 24 Jul 2023 247th kg583 🇺🇸 860 141 49ms 14 days ago 248th jared-hughes 860 246 19ms 23 Dec 2023 249th Attero 🇸🇪 859 86 16ms 20 Sep 2023 250th ovs-code 🇩🇪 858 94 135ms 11 Nov 2023 251st inventshah 854 131 127ms 23 Oct 2023 252nd GolfingSuccess 🇬🇷 854 193 103ms 2 days ago 253rd CaedenHarper 🇨🇦 853 77 457ms 10 Dec 2025 254th helbling 🇨🇭 851 85 13ms 20 Feb 2024 255th JayXon 🇺🇸 851 151 307ms 18 Sep 2024 256th primo-ppcg 🇹🇭 849 260 54ms 2 Aug 2023 257th SirBogman 🇺🇸 848 48 32ms 28 Nov 2022 257th stackofbears 848 48 36ms 23 Feb 2024 259th primo-ppcg 🇹🇭 848 119 164ms 31 May 2021 260th Lv0Sys 🇵🇱 845 81 10ms 1 Dec 2025 261st AlephSquirrel 842 78 472ms 16 Jan 2024 262nd kumavale 841 117 136ms 14 Nov 2025 263rd duckyluuk 🇳🇱 840 98 27ms 25 Jun 2025 264th GrayJoKing 🇦🇺 840 102 13ms 12 Sep 2024 265th sean-niemann 🇺🇸 839 88 10ms 28 Dec 2023 266th inventshah 839 109 2,741ms 20 Nov 2024 267th nwellnhof 🇩🇪 837 116 65ms 24 Jul 2023 268th Shanethegamer 🇺🇸 837 145 45ms 12 Apr 2024 269th wuduculfre 835 82 13ms 22 Jul 2025 270th stefangimmillaro 834 118 128ms 18 May 2025 271st Kacarott 🇦🇺 832 105 62ms 9 Dec 2025 272nd edsrzf 🇳🇿 832 125 24ms 3 Dec 2025 273rd lynn 831 49 35ms 18 Apr 2021 274th razetime 830 47 4ms 12 Jan 2022 274th GolfingSuccess 🇬🇷 830 47 4ms 13 Jan 2022 274th Steffan153 🇫🇮 830 47 4ms 10 Feb 2023 274th Natanaelel 🇸🇪 830 47 4ms 14 Jul 2023 278th marshallward 🇺🇸 829 111 41ms 23 Dec 2024 279th GrayJoKing 🇦🇺 829 135 190ms 29 Mar 2023 280th m-tkach 🇺🇦 827 159 25ms 15 Dec 2022 281st somebody1234 826 64 4ms 10 Dec 2018 282nd edre 825 83 10ms 9 Jul 2018 282nd snydej 825 83 14ms 21 Nov 2024 284th inventshah 825 110 464ms 9 Jan 2024 285th DialFrost 🇸🇬 825 138 122ms 3 Dec 2025 286th primo-ppcg 🇹🇭 823 128 42ms 5 Oct 2020 287th Attero 🇸🇪 822 88 11ms 21 Oct 2020 287th nathanadams 🇳🇿 822 88 12ms 23 Sep 2021 287th jared-hughes 822 88 12ms 17 Feb 2022 290th inventshah 822 131 104ms 23 Oct 2023 291st ScottHamper 822 134 536ms 30 Nov 2025 292nd rucin93 🇵🇱 821 90 139ms 25 Sep 2024 293rd tomtheisen 🇺🇸 819 99 399ms 30 Jan 2023 294th primo-ppcg 🇹🇭 819 123 169ms 6 Aug 2023 295th Natanaelel 🇸🇪 818 71 178ms 11 Aug 2023 296th inventshah 817 116 136ms 22 Oct 2023 297th emgordon154 816 105 19ms 6 Jun 2025 298th Shanethegamer 🇺🇸 816 137 125ms 21 Jun 2024 299th primo-ppcg 🇹🇭 815 70 38ms 5 Oct 2020 300th cubed-guy 815 84 9ms 12 Feb 2022 301st DialFrost 🇸🇬 814 77 309ms 8 May 2024 302nd MeWhenI 🇻🇦 814 149 9ms 12 Apr 2024 303rd NewDefectus 🇮🇱 813 74 55ms 9 Oct 2021 304th ETHproductions 🇺🇸 813 89 12ms 9 Jul 2018 305th primo-ppcg 🇹🇭 813 121 135ms 12 Jun 2020 305th edsrzf 🇳🇿 813 121 197ms 5 Apr 2025 307th lifthrasiir 🇰🇷 812 48 2ms 5 Dec 2024 308th DialFrost 🇸🇬 812 76 744ms 5 Sep 2025 308th CaedenHarper 🇨🇦 812 76 1,132ms 9 Dec 2025 310th primo-ppcg 🇹🇭 811 126 1,420ms 30 Nov 2021 311th MeWhenI 🇻🇦 811 138 315ms 9 Dec 2022 312th lynn 810 98 10ms 18 Nov 2021 312th IanUtley 810 98 36ms 2 Nov 2023 314th Steffan153 🇫🇮 810 153 55ms 4 Jul 2024 315th prplz 🇦🇺 808 80 401ms 6 Jul 2020 315th SirBogman 🇺🇸 808 80 317ms 18 Oct 2021 317th Alex-x90 🇺🇸 808 117 278ms 19 Oct 2023 318th inventshah 807 122 267ms 18 Jul 2023 319th SirBogman 🇺🇸 806 72 187ms 28 Nov 2022 320th Flekay 🇩🇪 806 85 13ms 14 days ago First Prev 241–320 of 1,669 Next Last