The Gray Code Decoder and Gray Code Encoder holes will go live in approximately 39 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 232nd PogLop 🇨🇿 403 472 10ms 15 Oct 2022 232nd aksyristos 403 472 11ms 9 Jan 2023 232nd sciencejiho 403 472 10ms 24 Apr 2024 232nd pickerj 403 472 10ms 22 Aug 2024 232nd voidgloom 403 472 10ms 22 Oct 2024 232nd ItsMeNoobieboy 403 472 10ms 1 Dec 2024 232nd dpasionek 403 472 10ms 6 Dec 2024 232nd TheZwierzLF 🇵🇱 403 472 10ms 20 Dec 2025 232nd mossiegoat 403 472 10ms 26 Jan 2026 232nd Techdude01 403 472 10ms 28 Feb 2026 251st guliyevemil1 🇦🇿 402 473 11ms 18 Apr 2020 251st hjcafaroUC 402 473 10ms 28 Jul 2020 251st Foxx-l 402 473 10ms 30 Mar 2023 251st tobyLovick 402 473 10ms 6 Dec 2023 251st m42km 402 473 9ms 4 Feb 2024 251st chenmingxiang110 402 473 9ms 19 Feb 2024 251st abhishekg999 402 473 12ms 21 Sep 2024 251st fuzzylojik-golf 🇺🇸 402 473 10ms 13 Jun 2025 251st wuduculfre 402 473 10ms 27 Jul 2025 251st hippalectryon-0 402 473 10ms 6 Dec 2025 251st nemoyatpeace 402 473 10ms 28 Dec 2025 251st OutWrest 402 473 10ms 3 hours ago 263rd wazawoo 401 474 10ms 21 Oct 2018 263rd EManLava 401 474 10ms 8 May 2020 263rd Ellipsibus 401 474 10ms 2 Aug 2022 263rd mosho-p 401 474 9ms 13 Oct 2022 263rd yoka255 401 474 10ms 25 Mar 2023 263rd mattf1n 401 474 10ms 25 Oct 2023 263rd elgan65536 🇺🇸 401 474 10ms 15 Apr 2024 263rd LuisGoncalves05 🇵🇹 401 474 10ms 18 Jul 2025 263rd RaBa21 🇭🇺 401 474 10ms 21 Jul 2025 263rd AstroOrbis 401 474 11ms 24 Nov 2025 273rd lucadonini96 400 475 9ms 17 Apr 2020 273rd Hydrophobefireman 400 475 10ms 17 Jul 2020 273rd dourvaris 400 475 16ms 9 Aug 2020 273rd DeFilippis 400 475 11ms 9 Feb 2021 273rd cubed-guy 400 475 9ms 17 Oct 2021 273rd Bonjour27891 🇻🇳 400 475 10ms 13 Mar 2022 273rd Trunksistor 🇫🇷 400 475 10ms 21 Apr 2022 273rd AbelPelser 400 475 10ms 2 Jul 2022 273rd DaCuteRaccoon 400 475 9ms 1 Oct 2022 273rd brochmann 🇸🇪 400 475 9ms 18 Oct 2022 273rd thehylian 400 475 11ms 27 Dec 2022 273rd jumelet 🇳🇱 400 475 9ms 2 Jan 2023 273rd tvcv901 400 475 10ms 26 Feb 2023 273rd dev-Thae 400 475 10ms 6 Nov 2023 273rd rsgray 400 475 10ms 8 Jan 2024 273rd yousefalizadeh 400 475 10ms 3 Oct 2024 273rd CoolBvll 400 475 10ms 12 Jun 2025 273rd Andrey2001 400 475 9ms 24 Nov 2025 291st Sakaala 399 476 11ms 23 Apr 2019 291st petar-donchev 399 476 9ms 4 Dec 2020 291st jiaminglimjm 🇲🇾 399 476 10ms 15 Jan 2021 291st rowboat1 399 476 10ms 19 Jun 2022 291st prestonfu 399 476 9ms 6 Jul 2022 291st SocialFault 399 476 10ms 21 Aug 2022 291st 0-4849 399 476 9ms 30 Oct 2022 291st tsidwick 399 476 9ms 20 Dec 2023 291st gabe-gallegos 399 476 11ms 30 Apr 2024 291st liamLatour 399 476 10ms 3 Aug 2024 291st imelxr 🇮🇱 399 476 9ms 16 Aug 2024 291st jfallon1997 399 476 9ms 27 Sep 2024 291st jan-Simiman 399 476 10ms 15 Oct 2024 291st Artemis21 🇬🇧 399 476 10ms 29 Dec 2024 291st ocefra 399 476 9ms 31 Dec 2024 306th alaaeelsayed 398 477 10ms 23 Jul 2018 306th markus-rekdal 398 477 9ms 31 May 2019 306th dymowski 398 477 9ms 17 Jul 2019 306th streifenfrei 398 477 11ms 27 Jan 2021 306th ArnaudGazda 398 477 9ms 2 Sep 2022 306th lomaxo 398 477 10ms 16 Dec 2022 306th LogicalJoe 398 477 10ms 5 Jan 2023 306th Deedogg 398 477 10ms 24 Oct 2025 314th boxjelly 397 478 9ms 24 Feb 2021 314th pyrolitic 🇮🇪 397 478 11ms 5 Apr 2022 314th guilhem-roy 🇫🇷 397 478 10ms 31 Aug 2022 314th CarsonChr 🇺🇸 397 478 10ms 17 Sep 2022 314th cros107 🇦🇺 397 478 9ms 26 Oct 2022 314th mhsaul 397 478 9ms 11 Apr 2023 314th bobbysq 397 478 10ms 2 May 2023 First Prev 241–320 of 1,171 Next Last
