The Gray Code Decoder and Gray Code Encoder holes will go live in approximately 5 days. Why not try and solve them ahead of time?
Look and Say 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 881st ashtraypettingzoo 🇺🇸 657 48 2ms 5 Apr 2023 882nd Yewzir 🇧🇪 656 113 7ms 27 Jan 2024 883rd dizzyliam 656 126 123ms 27 Oct 2021 884th boxjelly 655 110 15ms 12 Feb 2021 884th cesarm4 655 110 11ms 31 Aug 2021 884th Kloppermand 🇩🇰 655 110 16ms 28 Sep 2021 884th LeeCamp 655 110 12ms 15 Feb 2022 884th za3k 655 110 10ms 12 Oct 2022 884th lzahray 655 110 11ms 25 Oct 2022 884th Re-Adventures 🇮🇳 655 110 10ms 4 Jan 2023 884th luuumine 🇫🇷 655 110 10ms 1 Dec 2025 892nd stefangimmillaro 655 136 398ms 15 Jun 2025 893rd elgan65536 🇺🇸 655 179 160ms 7 Feb 2026 894th stefangimmillaro 654 159 497ms 6 Oct 2025 895th Yewzir 🇧🇪 654 183 285ms 25 Oct 2023 896th btjones0 653 118 12ms 5 Jan 2021 897th RocketRammer 🇬🇧 651 84 261ms 14 Jul 2023 898th RDShah 651 89 11ms 6 Jan 2022 898th akshatj27 🇦🇶 651 89 11ms 11 Jan 2022 900th MeWhenI 🇻🇦 651 163 43ms 20 May 2023 901st MeWhenI 🇻🇦 651 184 291ms 9 Feb 2023 902nd NewDefectus 🇮🇱 650 51 52ms 6 Sep 2021 903rd johnnythedoggie 649 111 10ms 29 Apr 2021 903rd blamegames 649 111 10ms 16 May 2021 903rd fgrosshans 🇫🇷 649 111 11ms 7 May 2023 903rd rollershutter 649 111 12ms 11 Jul 2023 903rd wk1093 649 111 10ms 18 Nov 2023 903rd SoliGhost 649 111 10ms 10 Jun 2025 909th jared-hughes 648 119 11ms 17 Jul 2022 910th Yewzir 🇧🇪 648 156 524ms 9 Feb 2024 911th SwordF-Official 🇺🇸 644 49 3ms 20 Jun 2025 912th vezzick 643 112 11ms 4 Mar 2021 912th guilhem-roy 🇫🇷 643 112 11ms 28 Feb 2022 912th celiendonze 🇨🇭 643 112 10ms 18 Jul 2023 912th CutSandstone 643 112 11ms 4 Jul 2024 912th codingisgreatbutiamnot 643 112 10ms 7 Aug 2024 912th muser-logiccpu 🇺🇦 643 112 10ms 21 Aug 2025 918th msbranicky 641 102 492ms 17 Jan 2024 918th Yewzir 🇧🇪 641 102 434ms 5 Feb 2024 920th Kaffeleif 639 116 6ms 5 Jan 2024 921st BBoehm 🇩🇪 637 55 131ms 12 Feb 2021 922nd jiaminglimjm 🇲🇾 637 113 11ms 6 Jan 2021 922nd mothcolada 🇺🇸 637 113 10ms 21 Apr 2021 922nd NicoAdams 637 113 10ms 5 Jan 2022 922nd martinnorling 🇸🇪 637 113 13ms 21 Feb 2022 922nd jfallon1997 637 113 10ms 8 Aug 2022 922nd RandGuy 637 113 10ms 22 Nov 2022 922nd jacksonhenry3 637 113 10ms 2 Dec 2022 922nd badboj40 637 113 10ms 26 Dec 2022 922nd Techdude01 637 113 10ms 14 Feb 2023 922nd 2011-Chan-Ethan 637 113 11ms 9 Jul 2023 922nd yokasuretsu 637 113 10ms 9 Jan 2025 922nd Pyroan 637 113 9ms 25 Feb 2025 934th jtaxen 635 120 134ms 15 Jul 2024 935th Toanuvo 634 59 33ms 20 Jan 2022 936th Shanethegamer 🇺🇸 633 139 19ms 12 Sep 2022 937th MeWhenI 🇻🇦 633 151 2ms 20 Feb 2023 938th geofft 632 114 10ms 10 Dec 2020 938th j-Ewan 632 114 10ms 11 Mar 2022 938th 40fied4t 632 114 10ms 17 May 2025 938th dirckvdende 632 114 12ms 25 Jul 2025 942nd primo-ppcg 🇹🇭 631 165 442ms 4 Aug 2021 943rd btjones0 631 186 167ms 5 Jan 2021 944th johnnythedoggie 630 119 96ms 3 Mar 2021 945th a6166231 🇨🇳 629 92 11ms 5 Jun 2025 946th TheZwierzLF 🇵🇱 629 104 445ms 23 Nov 2025 947th Salutations45 628 95 2ms 19 Dec 2024 948th dokutan 627 142 402ms 25 Sep 2025 948th amazingalek 🇳🇴 627 142 465ms 11 Jan 2026 950th msbranicky 627 191 299ms 7 Jan 2025 951st dahrens 626 115 10ms 13 May 2021 951st AbelPelser 626 115 9ms 2 Jul 2022 951st OppositeShark 626 115 10ms 20 Jul 2022 951st adamnielson42 🇺🇸 626 115 10ms 1 Jun 2023 951st cingulataluke 626 115 10ms 29 Aug 2023 951st Andrey2001 626 115 9ms 6 Dec 2025 957th Laksen 🇩🇰 626 216 25ms 8 Jul 2021 958th itiievskyi 🇺🇦 625 56 133ms 5 Jan 2021 958th DialFrost 🇸🇬 625 56 132ms 25 Dec 2024 960th 4hg 🇺🇸 624 60 34ms 3 Mar 2023 First Prev 881–960 of 2,109 Next Last
