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 801st Meowsan91 🇨🇿 473 167 408ms 21 Nov 2021 802nd gigaprofisi 🇺🇸 472 149 11ms 17 Nov 2025 803rd MeWhenI 🇻🇦 472 153 106ms 18 Nov 2023 804th keelimeguy 🇺🇸 472 268 299ms 2 Jun 2025 805th benwilliamgraham 471 123 20ms 25 Oct 2021 806th Yewzir 🇧🇪 471 202 510ms 27 Jan 2024 807th yoshykai 471 226 526ms 8 Apr 2025 808th DrPiranoid 470 164 6ms 14 Oct 2022 809th detrumi 🇳🇱 468 124 436ms 24 Oct 2020 810th boxjelly 467 116 39ms 12 Feb 2021 811th skps2010 467 124 11ms 16 Jun 2019 811th mossprescott 467 124 12ms 18 Jan 2023 811th guilhem-roy 🇫🇷 467 124 16ms 26 Jun 2023 811th kistlerf 🇨🇭 467 124 14ms 28 May 2025 815th aaronze 🇦🇺 466 151 16ms 27 Apr 2021 816th scpchicken 🇵🇼 466 212 87ms 18 Apr 2023 817th MeWhenI 🇻🇦 466 222 45ms 29 Aug 2024 818th hardlyBearable 463 125 11ms 25 May 2019 818th smartiel 463 125 18ms 16 Sep 2022 818th charliegaming 463 125 11ms 4 Oct 2023 818th Alban-Boissard 463 125 11ms 14 Jun 2025 822nd squadb3 463 152 14ms 10 Oct 2019 822nd Quadruplay 463 152 12ms 12 Jul 2025 824th roguh 🇬🇹 463 170 154ms 18 Jan 2024 825th Yewzir 🇧🇪 463 297 1,792ms 14 Nov 2025 826th pandapawskat 462 167 6ms 1 Sep 2021 827th Attero 🇸🇪 462 171 409ms 21 Nov 2021 828th bastienvoirin 🇫🇷 460 126 17ms 28 Nov 2020 828th lemogne 460 126 19ms 10 Aug 2021 828th ThijsLuttikhuis 460 126 20ms 3 Mar 2024 828th Mabeloid 🇳🇴 460 126 15ms 22 Sep 2024 828th robin-scragg 460 126 27ms 10 Oct 2025 833rd RussellEmerine 460 171 139ms 10 Apr 2020 834th citsur 456 169 6ms 17 Jun 2019 835th MeWhenI 🇻🇦 456 284 62ms 25 Jun 2022 836th boxjelly 455 278 328ms 10 Feb 2021 837th KatieLG 🇬🇧 454 126 1,719ms 20 Oct 2021 838th CatsAreFluffy 454 155 17ms 20 Feb 2023 839th rambox11 453 170 6ms 16 Mar 2019 840th msrawson 452 128 12ms 28 Aug 2018 840th madeforlosers 452 128 19ms 30 Nov 2023 842nd mintypython 451 156 11ms 21 Sep 2019 842nd unfinishedprogram 451 156 13ms 27 Oct 2023 844th dloscutoff 450 129 321ms 27 Nov 2018 845th jfallon1997 449 129 11ms 6 Sep 2022 845th DrPiranoid 449 129 10ms 12 Oct 2022 845th BREMAUCY 🇫🇷 449 129 14ms 4 Jan 2024 848th yokasuretsu 448 121 41ms 11 Jul 2018 849th ibexq 448 172 6ms 6 Mar 2023 850th msbranicky 447 231 3ms 3 Oct 2024 851st Dazza314 🇬🇧 446 130 12ms 31 Oct 2020 851st xkacer 🇨🇿 446 130 10ms 31 Jan 2021 851st nstearns96 🇬🇧 446 130 321ms 10 Jan 2023 854th edsrzf 🇳🇿 444 162 6ms 6 Oct 2024 855th JGDoerrer 444 217 155ms 18 Jan 2022 856th msbranicky 443 179 115ms 17 Aug 2023 857th Mabeloid 🇳🇴 442 126 513ms 22 Sep 2024 858th OllieBoyne 🇬🇧 442 131 11ms 2 Jan 2021 859th Alex-x90 🇺🇸 441 241 434ms 17 Mar 2024 860th JRaspass 🇬🇧 440 96 5ms 20 Dec 2022 861st andre-lameirinhas 🇵🇹 439 132 16ms 3 Oct 2020 861st fynnkroeger 439 132 12ms 4 Jan 2023 861st zgialor-lab 439 132 11ms 20 days ago 864th h3ra993huskp 🇯🇵 438 243 490ms 30 Nov 2025 865th eranws 437 161 12ms 28 Sep 2022 866th msbranicky 436 229 143ms 1 Jan 2024 867th cafehaine 🇫🇷 436 237 3ms 5 Feb 2020 868th garrisonhh 435 133 19ms 21 Nov 2020 869th Natanaelel 🇸🇪 433 178 6ms 14 May 2023 870th ludwig-n 432 134 11ms 6 Apr 2021 870th forthuser 432 134 18ms 24 Jul 2023 870th mbittner20 432 134 11ms 19 Aug 2023 873rd Yewzir 🇧🇪 432 219 65ms 5 Apr 2024 874th aDwarfNamedUrist 432 239 3ms 6 Dec 2022 875th roguh 🇬🇹 431 179 6ms 8 Jan 2024 876th dokutan 430 232 150ms 22 Dec 2024 877th geofft 429 135 28ms 11 Dec 2020 877th Y0UR-U5ERNAME 429 135 13ms 4 Jul 2022 879th two-bad 🇬🇧 429 164 12ms 25 Feb 2024 880th rucin93 🇵🇱 429 248 425ms 28 Nov 2023 First Prev 801–880 of 1,659 Next Last
