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?
Day of Week 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 156th vhoulbreque 🇫🇷 867 98 22ms 4 Dec 2025 162nd TaserTheFox 🇺🇸 859 99 19ms 17 Apr 2023 162nd ehulinsky 🇺🇸 859 99 21ms 10 May 2023 162nd minhtrancccp 859 99 19ms 1 Nov 2023 162nd roguh 🇬🇹 859 99 18ms 22 Jan 2024 162nd namelessiw 859 99 14ms 21 Feb 2024 162nd SB-945 859 99 14ms 5 Mar 2024 162nd jtaxen 859 99 18ms 22 Mar 2024 162nd christensendaniel 859 99 15ms 14 May 2024 162nd abhishekg999 859 99 33ms 22 Sep 2024 162nd moustave 859 99 15ms 7 Jan 2025 162nd sciencejiho 859 99 14ms 10 Feb 2025 162nd 0dyse 859 99 19ms 15 Apr 2025 162nd Voltrifrodec 🇸🇰 859 99 15ms 27 Apr 2025 162nd CoolBvll 859 99 19ms 10 Jul 2025 162nd michelebastione 🇮🇹 859 99 15ms 6 Aug 2025 162nd jacekwladzinski 859 99 14ms 4 Oct 2025 162nd KatieLG 🇬🇧 859 99 17ms 23 Dec 2025 162nd Matter1024 🇮🇳 859 99 15ms 1 Mar 2026 180th XioR112 🇵🇱 850 100 22ms 5 Sep 2023 180th OCNeve 850 100 18ms 18 Jun 2024 180th StinkyMilo 850 100 14ms 13 May 2025 183rd uttumuttu 🇫🇮 842 101 14ms 22 Dec 2023 183rd jameswmccarty 842 101 13ms 6 Mar 2025 185th Natanaelel 🇸🇪 833 102 14ms 18 Apr 2023 185th VV1Git 833 102 14ms 19 Apr 2023 185th brochmann 🇸🇪 833 102 22ms 13 Aug 2023 185th sbatllori 833 102 24ms 25 Aug 2023 185th itsrenderman 833 102 23ms 30 Sep 2023 185th pde-bakk 🇳🇱 833 102 24ms 23 Oct 2023 185th ktanaka 833 102 14ms 11 Jan 2024 185th Krtecik 833 102 23ms 9 Feb 2024 185th qwjhvbxi 833 102 23ms 9 Feb 2024 185th pkilar43 833 102 23ms 9 Feb 2024 185th bwenstar 833 102 22ms 21 Feb 2024 185th sultan 833 102 24ms 26 Feb 2024 185th Trusly 833 102 23ms 27 Feb 2024 185th NoneTheFewer 833 102 21ms 17 May 2024 185th FranklinJiaChen 833 102 23ms 1 Jul 2024 185th lchaumartin 833 102 23ms 22 Aug 2024 185th alemelis 833 102 23ms 13 Sep 2024 185th ComputerKWasTaken 🇺🇸 833 102 21ms 24 Sep 2024 185th xyangst 833 102 14ms 3 Oct 2024 185th JunkIce 833 102 21ms 4 Oct 2024 185th wh3n3v3r 🇨🇿 833 102 23ms 20 Nov 2024 185th codewrite 🇬🇧 833 102 22ms 19 Apr 2025 185th kistlerf 🇨🇭 833 102 23ms 14 May 2025 185th ffelixm 833 102 23ms 1 Jun 2025 185th Andrey2001 833 102 37ms 26 Nov 2025 210th MichalMarsalek 🇨🇿 825 103 14ms 16 Apr 2023 210th adamnielson42 🇺🇸 825 103 20ms 4 May 2023 210th NickTheEASDude 🇺🇸 825 103 14ms 29 Jan 2024 210th CutSandstone 825 103 14ms 4 Jul 2024 210th NanduBC 825 103 23ms 3 Sep 2024 210th FEZfan 🇦🇺 825 103 25ms 18 Apr 2025 210th RaBa21 🇭🇺 825 103 15ms 19 Jul 2025 210th TheZwierzLF 🇵🇱 825 103 15ms 21 Nov 2025 218th OllieBoyne 🇬🇧 817 104 23ms 17 Apr 2023 218th Eilonlif 🇮🇱 817 104 22ms 17 Apr 2023 218th Ripick 817 104 24ms 12 May 2023 218th eddvrs 817 104 23ms 18 May 2023 218th fbe 817 104 23ms 26 May 2023 218th Wildst 817 104 15ms 6 Jul 2023 218th cefqrn 817 104 27ms 1 Nov 2023 218th bsoyka 🇺🇸 817 104 23ms 25 Nov 2023 218th neihousaigaai 817 104 23ms 11 Feb 2024 218th wilhelmines 817 104 15ms 1 Jun 2024 218th jiaminglimjm 🇲🇾 817 104 21ms 5 Jul 2024 218th JesseNoEyes 🇺🇸 817 104 15ms 18 Sep 2024 218th Rago-Tony 817 104 23ms 11 Jul 2025 231st bbnumber2 810 105 15ms 29 Oct 2023 231st keelimeguy 🇺🇸 810 105 15ms 16 Nov 2023 231st PowershellKnut 🇳🇴 810 105 24ms 7 Jan 2024 231st samual-hain 810 105 23ms 4 Apr 2024 231st gallium-gonzollium 810 105 24ms 25 Aug 2024 231st jastrzumb 810 105 14ms 3 Jan 2025 237th imoxyg 802 106 22ms 29 Aug 2025 238th DrPrettyman 794 107 23ms 5 Jul 2023 238th kkoenig 794 107 15ms 22 Dec 2023 240th Florian-Mt 787 108 14ms 24 Sep 2023 First Prev 161–240 of 327 Next Last
