The Gray Code Decoder and Gray Code Encoder holes will go live in approximately 2 days. 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 403 472 11ms 9 Jan 2023 231st sciencejiho 403 472 10ms 24 Apr 2024 231st pickerj 403 472 10ms 22 Aug 2024 231st voidgloom 403 472 10ms 22 Oct 2024 231st ItsMeNoobieboy 403 472 10ms 1 Dec 2024 231st dpasionek 403 472 10ms 6 Dec 2024 231st TheZwierzLF 🇵🇱 403 472 10ms 20 Dec 2025 231st mossiegoat 403 472 10ms 26 Jan 2026 231st Techdude01 403 472 10ms 28 Feb 2026 250th guliyevemil1 🇦🇿 402 473 11ms 18 Apr 2020 250th hjcafaroUC 402 473 10ms 28 Jul 2020 250th Foxx-l 402 473 10ms 30 Mar 2023 250th tobyLovick 402 473 10ms 6 Dec 2023 250th m42km 402 473 9ms 4 Feb 2024 250th chenmingxiang110 402 473 9ms 19 Feb 2024 250th abhishekg999 402 473 12ms 21 Sep 2024 250th fuzzylojik-golf 🇺🇸 402 473 10ms 13 Jun 2025 250th wuduculfre 402 473 10ms 27 Jul 2025 250th hippalectryon-0 402 473 10ms 6 Dec 2025 250th nemoyatpeace 402 473 10ms 28 Dec 2025 261st wazawoo 401 474 10ms 21 Oct 2018 261st EManLava 401 474 10ms 8 May 2020 261st Ellipsibus 401 474 10ms 2 Aug 2022 261st mosho-p 401 474 9ms 13 Oct 2022 261st yoka255 401 474 10ms 25 Mar 2023 261st mattf1n 401 474 10ms 25 Oct 2023 261st elgan65536 🇺🇸 401 474 10ms 15 Apr 2024 261st LuisGoncalves05 🇵🇹 401 474 10ms 18 Jul 2025 261st RaBa21 🇭🇺 401 474 10ms 21 Jul 2025 261st AstroOrbis 401 474 11ms 24 Nov 2025 271st lucadonini96 400 475 9ms 17 Apr 2020 271st Hydrophobefireman 400 475 10ms 17 Jul 2020 271st dourvaris 400 475 16ms 9 Aug 2020 271st DeFilippis 400 475 11ms 9 Feb 2021 271st cubed-guy 400 475 9ms 17 Oct 2021 271st Bonjour27891 🇻🇳 400 475 10ms 13 Mar 2022 271st Trunksistor 🇫🇷 400 475 10ms 21 Apr 2022 271st AbelPelser 400 475 10ms 2 Jul 2022 271st DaCuteRaccoon 400 475 9ms 1 Oct 2022 271st brochmann 🇸🇪 400 475 9ms 18 Oct 2022 271st thehylian 400 475 11ms 27 Dec 2022 271st jumelet 🇳🇱 400 475 9ms 2 Jan 2023 271st tvcv901 400 475 10ms 26 Feb 2023 271st dev-Thae 400 475 10ms 6 Nov 2023 271st rsgray 400 475 10ms 8 Jan 2024 271st yousefalizadeh 400 475 10ms 3 Oct 2024 271st CoolBvll 400 475 10ms 12 Jun 2025 271st Andrey2001 400 475 9ms 24 Nov 2025 289th Sakaala 399 476 11ms 23 Apr 2019 289th petar-donchev 399 476 9ms 4 Dec 2020 289th jiaminglimjm 🇲🇾 399 476 10ms 15 Jan 2021 289th rowboat1 399 476 10ms 19 Jun 2022 289th prestonfu 399 476 9ms 6 Jul 2022 289th SocialFault 399 476 10ms 21 Aug 2022 289th 0-4849 399 476 9ms 30 Oct 2022 289th tsidwick 399 476 9ms 20 Dec 2023 289th gabe-gallegos 399 476 11ms 30 Apr 2024 289th liamLatour 399 476 10ms 3 Aug 2024 289th imelxr 🇮🇱 399 476 9ms 16 Aug 2024 289th jfallon1997 399 476 9ms 27 Sep 2024 289th jan-Simiman 399 476 10ms 15 Oct 2024 289th Artemis21 🇬🇧 399 476 10ms 29 Dec 2024 289th ocefra 399 476 9ms 31 Dec 2024 304th alaaeelsayed 398 477 10ms 23 Jul 2018 304th markus-rekdal 398 477 9ms 31 May 2019 304th dymowski 398 477 9ms 17 Jul 2019 304th streifenfrei 398 477 11ms 27 Jan 2021 304th ArnaudGazda 398 477 9ms 2 Sep 2022 304th lomaxo 398 477 10ms 16 Dec 2022 304th LogicalJoe 398 477 10ms 5 Jan 2023 304th Deedogg 398 477 10ms 24 Oct 2025 312th boxjelly 397 478 9ms 24 Feb 2021 312th pyrolitic 🇮🇪 397 478 11ms 5 Apr 2022 312th guilhem-roy 🇫🇷 397 478 10ms 31 Aug 2022 312th CarsonChr 🇺🇸 397 478 10ms 17 Sep 2022 312th cros107 🇦🇺 397 478 9ms 26 Oct 2022 312th mhsaul 397 478 9ms 11 Apr 2023 312th bobbysq 397 478 10ms 2 May 2023 312th msbranicky 397 478 10ms 3 Aug 2023 312th Bulmenisaurus 397 478 10ms 24 Jul 2024 First Prev 241–320 of 1,169 Next Last
