The Gray Code Decoder and Gray Code Encoder holes will go live in approximately 4 hours. Why not try and solve them ahead of time?
12 Days of Christmas in Python 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 231st aksyristos 875 472 11ms 9 Jan 2023 231st sciencejiho 875 472 10ms 24 Apr 2024 231st pickerj 875 472 10ms 22 Aug 2024 231st voidgloom 875 472 10ms 22 Oct 2024 231st ItsMeNoobieboy 875 472 10ms 1 Dec 2024 231st dpasionek 875 472 10ms 6 Dec 2024 231st TheZwierzLF 🇵🇱 875 472 10ms 20 Dec 2025 231st mossiegoat 875 472 10ms 26 Jan 2026 231st Techdude01 875 472 10ms 28 Feb 2026 250th guliyevemil1 🇦🇿 873 473 10ms 18 Apr 2020 250th hjcafaroUC 873 473 10ms 28 Jul 2020 250th Foxx-l 873 473 10ms 30 Mar 2023 250th tobyLovick 873 473 10ms 6 Dec 2023 250th m42km 873 473 9ms 4 Feb 2024 250th chenmingxiang110 873 473 9ms 19 Feb 2024 250th abhishekg999 873 473 11ms 21 Sep 2024 250th fuzzylojik-golf 🇺🇸 873 473 10ms 13 Jun 2025 250th wuduculfre 873 473 10ms 27 Jul 2025 250th hippalectryon-0 873 473 10ms 6 Dec 2025 250th nemoyatpeace 873 473 10ms 28 Dec 2025 250th OutWrest 873 473 10ms 39 hours ago 262nd wazawoo 871 474 10ms 21 Oct 2018 262nd EManLava 871 474 10ms 8 May 2020 262nd Ellipsibus 871 474 10ms 2 Aug 2022 262nd mosho-p 871 474 9ms 13 Oct 2022 262nd yoka255 871 474 10ms 25 Mar 2023 262nd mattf1n 871 474 10ms 25 Oct 2023 262nd elgan65536 🇺🇸 871 474 10ms 15 Apr 2024 262nd LuisGoncalves05 🇵🇹 871 474 10ms 18 Jul 2025 262nd RaBa21 🇭🇺 871 474 10ms 21 Jul 2025 262nd AstroOrbis 871 474 11ms 24 Nov 2025 262nd F4075 871 474 10ms 3 hours ago 273rd lucadonini96 869 475 9ms 17 Apr 2020 273rd Hydrophobefireman 869 475 10ms 17 Jul 2020 273rd dourvaris 869 475 16ms 9 Aug 2020 273rd DeFilippis 869 475 10ms 9 Feb 2021 273rd cubed-guy 869 475 9ms 17 Oct 2021 273rd Bonjour27891 🇻🇳 869 475 9ms 13 Mar 2022 273rd Trunksistor 🇫🇷 869 475 10ms 21 Apr 2022 273rd AbelPelser 869 475 10ms 2 Jul 2022 273rd DaCuteRaccoon 869 475 9ms 1 Oct 2022 273rd brochmann 🇸🇪 869 475 9ms 18 Oct 2022 273rd thehylian 869 475 11ms 27 Dec 2022 273rd jumelet 🇳🇱 869 475 9ms 2 Jan 2023 273rd tvcv901 869 475 10ms 26 Feb 2023 273rd dev-Thae 869 475 9ms 6 Nov 2023 273rd rsgray 869 475 10ms 8 Jan 2024 273rd yousefalizadeh 869 475 10ms 3 Oct 2024 273rd CoolBvll 869 475 10ms 12 Jun 2025 273rd Andrey2001 869 475 9ms 24 Nov 2025 291st Sakaala 868 476 10ms 23 Apr 2019 291st petar-donchev 868 476 9ms 4 Dec 2020 291st jiaminglimjm 🇲🇾 868 476 10ms 15 Jan 2021 291st rowboat1 868 476 10ms 19 Jun 2022 291st prestonfu 868 476 9ms 6 Jul 2022 291st SocialFault 868 476 10ms 21 Aug 2022 291st 0-4849 868 476 9ms 30 Oct 2022 291st tsidwick 868 476 9ms 20 Dec 2023 291st gabe-gallegos 868 476 11ms 30 Apr 2024 291st liamLatour 868 476 10ms 3 Aug 2024 291st imelxr 🇮🇱 868 476 9ms 16 Aug 2024 291st jfallon1997 868 476 9ms 27 Sep 2024 291st jan-Simiman 868 476 10ms 15 Oct 2024 291st Artemis21 🇬🇧 868 476 10ms 29 Dec 2024 291st ocefra 868 476 9ms 31 Dec 2024 306th alaaeelsayed 866 477 10ms 23 Jul 2018 306th markus-rekdal 866 477 9ms 31 May 2019 306th dymowski 866 477 9ms 17 Jul 2019 306th streifenfrei 866 477 11ms 27 Jan 2021 306th ArnaudGazda 866 477 9ms 2 Sep 2022 306th lomaxo 866 477 10ms 16 Dec 2022 306th LogicalJoe 866 477 10ms 5 Jan 2023 306th Deedogg 866 477 10ms 24 Oct 2025 314th boxjelly 864 478 9ms 24 Feb 2021 314th pyrolitic 🇮🇪 864 478 11ms 5 Apr 2022 314th guilhem-roy 🇫🇷 864 478 10ms 31 Aug 2022 314th CarsonChr 🇺🇸 864 478 10ms 17 Sep 2022 314th cros107 🇦🇺 864 478 9ms 26 Oct 2022 314th mhsaul 864 478 9ms 11 Apr 2023 314th bobbysq 864 478 10ms 2 May 2023 First Prev 241–320 of 1,171 Next Last
