The Gray Code Decoder and Gray Code Encoder holes will go live in approximately 3 days. Why not try and solve them ahead of time?
12 Days of Christmas 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 878th neel11235813 872 486 414ms 26 Mar 2024 878th Yax42 🇫🇷 872 486 403ms 24 Nov 2025 883rd GolfingSuccess 🇬🇷 872 515 61ms 25 Dec 2023 884th menglishca 🇨🇦 872 524 422ms 6 Aug 2021 884th ravnskjaer 🇩🇰 872 524 446ms 15 Dec 2025 886th yamhab 🇨🇦 872 530 144ms 13 Sep 2023 887th SirBogman 🇺🇸 871 414 142ms 5 Oct 2020 888th retrohun 871 425 2ms 25 Sep 2022 889th dokutan 871 477 258ms 19 Jun 2024 890th Timwi 871 487 414ms 4 Dec 2024 891st shanthangolden 🇬🇧 871 496 85ms 18 Feb 2026 892nd prplz 🇦🇺 871 516 59ms 4 Jan 2022 893rd guliyevemil1 🇦🇿 871 530 304ms 16 Apr 2020 894th sean-niemann 🇺🇸 870 430 2ms 3 Jan 2024 894th neel11235813 870 430 2ms 26 Mar 2024 896th blaztoma 🇱🇹 870 448 34ms 13 Oct 2025 897th sagarv26 870 458 237ms 11 Jun 2021 898th emgordon154 870 463 1,334ms 21 Jul 2024 899th dsntzn 🇸🇰 870 468 9ms 9 Aug 2020 899th lowlighter 870 468 10ms 30 Oct 2020 899th SpareManiKatti 870 468 10ms 11 Sep 2021 899th akshatj27 🇦🇶 870 468 13ms 11 Jan 2022 899th pineapplebox 870 468 10ms 11 Feb 2022 899th Cazka 870 468 10ms 12 Feb 2022 899th BambooleanLogic 🇸🇪 870 468 11ms 19 Oct 2023 899th JOrE20 870 468 11ms 30 Jan 2026 907th Gymhgy 870 472 10ms 23 Apr 2019 907th rak1507 🇬🇧 870 472 10ms 15 Oct 2020 907th awnion 870 472 10ms 26 Dec 2020 907th harrymwilkins 🇬🇧 870 472 10ms 19 Jul 2021 907th OpesMentis 870 472 10ms 29 Oct 2021 907th TimHuisman1703 870 472 10ms 7 Jan 2022 907th Hakiwen 870 472 10ms 21 Jan 2022 907th jm600 870 472 10ms 19 Apr 2022 907th twocatsinatrenchcoat 870 472 9ms 4 May 2022 907th PogLop 🇨🇿 870 472 10ms 15 Oct 2022 907th aksyristos 870 472 11ms 9 Jan 2023 907th sciencejiho 870 472 10ms 24 Apr 2024 907th pickerj 870 472 10ms 22 Aug 2024 907th voidgloom 870 472 10ms 22 Oct 2024 907th ItsMeNoobieboy 870 472 10ms 1 Dec 2024 907th dpasionek 870 472 10ms 6 Dec 2024 907th TheZwierzLF 🇵🇱 870 472 10ms 20 Dec 2025 907th mossiegoat 870 472 10ms 26 Jan 2026 907th Techdude01 870 472 10ms 28 Feb 2026 926th Shanethegamer 🇺🇸 870 511 133ms 9 Jun 2022 927th janbehrens 🇩🇪 870 525 408ms 17 Jun 2023 928th jvdp1 870 549 40ms 24 Dec 2020 928th stefangimmillaro 870 549 41ms 31 May 2025 930th Yewzir 🇧🇪 869 484 154ms 27 Mar 2024 931st initram 869 488 390ms 21 Nov 2021 931st stefangimmillaro 869 488 421ms 20 Jun 2025 933rd comp0zr 868 449 38ms 27 Sep 2023 934th indented-automation 868 459 267ms 7 May 2024 935th dokutan 868 464 1,266ms 21 Apr 2025 936th mintypython 868 469 9ms 19 Oct 2018 936th rexim 868 469 11ms 28 Aug 2020 936th DaCuteRaccoon 868 469 10ms 30 Nov 2022 939th guliyevemil1 🇦🇿 868 473 11ms 18 Apr 2020 939th hjcafaroUC 868 473 10ms 28 Jul 2020 939th Foxx-l 868 473 10ms 30 Mar 2023 939th tobyLovick 868 473 10ms 6 Dec 2023 939th m42km 868 473 9ms 4 Feb 2024 939th chenmingxiang110 868 473 9ms 19 Feb 2024 939th abhishekg999 868 473 12ms 21 Sep 2024 939th fuzzylojik-golf 🇺🇸 868 473 10ms 13 Jun 2025 939th wuduculfre 868 473 10ms 27 Jul 2025 939th hippalectryon-0 868 473 10ms 6 Dec 2025 939th nemoyatpeace 868 473 10ms 28 Dec 2025 950th lynn 868 528 14ms 17 Nov 2021 951st fpesce 868 532 290ms 18 Mar 2022 952nd CaedenHarper 🇨🇦 867 463 411ms 5 Sep 2024 953rd msbranicky 867 492 2ms 20 Jan 2025 954th DaCuteRaccoon 867 533 162ms 2 Oct 2022 954th wackbyte 867 533 136ms 7 Nov 2023 954th blaztoma 🇱🇹 867 533 157ms 17 Aug 2025 957th neel11235813 867 547 25ms 12 Jan 2023 957th aviyanp 867 547 26ms 15 Oct 2025 959th alexkunin 866 470 10ms 4 Jul 2019 959th guliyevemil1 🇦🇿 866 470 10ms 20 Apr 2020 First Prev 881–960 of 4,081 Next Last
