The Gray Code Decoder and Gray Code Encoder holes will go live in approximately 6 hours. 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 881st janbehrens 🇩🇪 872 486 393ms 21 Nov 2021 881st SubsTheTechnomancer 872 486 390ms 28 Feb 2023 881st snoozingnewt 🇨🇦 872 486 404ms 23 Sep 2023 881st neel11235813 872 486 414ms 26 Mar 2024 881st Yax42 🇫🇷 872 486 403ms 24 Nov 2025 886th GolfingSuccess 🇬🇷 872 515 61ms 25 Dec 2023 887th menglishca 🇨🇦 872 524 422ms 6 Aug 2021 887th ravnskjaer 🇩🇰 872 524 446ms 15 Dec 2025 889th yamhab 🇨🇦 872 530 144ms 13 Sep 2023 890th SirBogman 🇺🇸 871 414 207ms 5 Oct 2020 891st retrohun 871 425 2ms 25 Sep 2022 892nd dokutan 871 477 258ms 19 Jun 2024 893rd Timwi 871 487 414ms 4 Dec 2024 894th shanthangolden 🇬🇧 871 496 85ms 18 Feb 2026 895th prplz 🇦🇺 871 516 59ms 4 Jan 2022 896th guliyevemil1 🇦🇿 871 530 304ms 16 Apr 2020 897th sean-niemann 🇺🇸 870 430 2ms 3 Jan 2024 897th neel11235813 870 430 2ms 26 Mar 2024 899th blaztoma 🇱🇹 870 448 34ms 13 Oct 2025 900th sagarv26 870 458 237ms 11 Jun 2021 901st emgordon154 870 463 1,334ms 21 Jul 2024 902nd dsntzn 🇸🇰 870 468 9ms 9 Aug 2020 902nd lowlighter 870 468 9ms 30 Oct 2020 902nd SpareManiKatti 870 468 9ms 11 Sep 2021 902nd akshatj27 🇦🇶 870 468 9ms 11 Jan 2022 902nd pineapplebox 870 468 9ms 11 Feb 2022 902nd Cazka 870 468 8ms 12 Feb 2022 902nd BambooleanLogic 🇸🇪 870 468 9ms 19 Oct 2023 902nd JOrE20 870 468 8ms 30 Jan 2026 910th Gymhgy 870 472 10ms 23 Apr 2019 910th rak1507 🇬🇧 870 472 10ms 15 Oct 2020 910th awnion 870 472 9ms 26 Dec 2020 910th harrymwilkins 🇬🇧 870 472 10ms 19 Jul 2021 910th OpesMentis 870 472 10ms 29 Oct 2021 910th TimHuisman1703 870 472 10ms 7 Jan 2022 910th Hakiwen 870 472 10ms 21 Jan 2022 910th jm600 870 472 10ms 19 Apr 2022 910th twocatsinatrenchcoat 870 472 9ms 4 May 2022 910th PogLop 🇨🇿 870 472 10ms 15 Oct 2022 910th aksyristos 870 472 11ms 9 Jan 2023 910th sciencejiho 870 472 10ms 24 Apr 2024 910th pickerj 870 472 10ms 22 Aug 2024 910th voidgloom 870 472 10ms 22 Oct 2024 910th ItsMeNoobieboy 870 472 10ms 1 Dec 2024 910th dpasionek 870 472 10ms 6 Dec 2024 910th TheZwierzLF 🇵🇱 870 472 10ms 20 Dec 2025 910th mossiegoat 870 472 10ms 26 Jan 2026 910th Techdude01 870 472 10ms 28 Feb 2026 929th Shanethegamer 🇺🇸 870 511 133ms 9 Jun 2022 930th janbehrens 🇩🇪 870 525 408ms 17 Jun 2023 931st jvdp1 870 549 40ms 24 Dec 2020 931st stefangimmillaro 870 549 41ms 31 May 2025 933rd Yewzir 🇧🇪 869 484 154ms 27 Mar 2024 934th initram 869 488 390ms 21 Nov 2021 934th stefangimmillaro 869 488 421ms 20 Jun 2025 936th comp0zr 868 449 38ms 27 Sep 2023 937th indented-automation 868 459 267ms 7 May 2024 938th dokutan 868 464 1,266ms 21 Apr 2025 939th mintypython 868 469 9ms 19 Oct 2018 939th rexim 868 469 9ms 28 Aug 2020 939th DaCuteRaccoon 868 469 10ms 30 Nov 2022 942nd guliyevemil1 🇦🇿 868 473 10ms 18 Apr 2020 942nd hjcafaroUC 868 473 10ms 28 Jul 2020 942nd Foxx-l 868 473 10ms 30 Mar 2023 942nd tobyLovick 868 473 10ms 6 Dec 2023 942nd m42km 868 473 9ms 4 Feb 2024 942nd chenmingxiang110 868 473 9ms 19 Feb 2024 942nd abhishekg999 868 473 11ms 21 Sep 2024 942nd fuzzylojik-golf 🇺🇸 868 473 10ms 13 Jun 2025 942nd wuduculfre 868 473 10ms 27 Jul 2025 942nd hippalectryon-0 868 473 10ms 6 Dec 2025 942nd nemoyatpeace 868 473 10ms 28 Dec 2025 942nd OutWrest 868 473 10ms 37 hours ago 954th lynn 868 528 14ms 17 Nov 2021 955th fpesce 868 532 290ms 18 Mar 2022 956th CaedenHarper 🇨🇦 867 463 411ms 5 Sep 2024 957th msbranicky 867 492 2ms 20 Jan 2025 958th DaCuteRaccoon 867 533 162ms 2 Oct 2022 958th wackbyte 867 533 136ms 7 Nov 2023 958th blaztoma 🇱🇹 867 533 157ms 17 Aug 2025 First Prev 881–960 of 4,087 Next Last
