The Gray Code Decoder and Gray Code Encoder holes will go live in approximately 3 days. Why not try and solve them ahead of time?
Day of Week 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 65th ovs-code 🇩🇪 961 85 15ms 2 Oct 2023 65th GrayJoKing 🇦🇺 961 85 16ms 2 Oct 2023 65th inventshah 961 85 14ms 2 Oct 2023 65th m-tkach 🇺🇦 961 85 36ms 2 Oct 2023 65th nwellnhof 🇩🇪 961 85 14ms 2 Oct 2023 65th btnlq 961 85 15ms 3 Oct 2023 65th xsot 🇸🇬 961 85 14ms 3 Oct 2023 65th Steffan153 🇫🇮 961 85 15ms 3 Oct 2023 65th 4hg 🇺🇸 961 85 15ms 4 Oct 2023 65th Rubiksmath 961 85 14ms 5 Oct 2023 65th StefanHabel 🇨🇦 961 85 14ms 12 Oct 2023 65th lynn 961 85 13ms 14 Oct 2023 65th pardouin 🇫🇷 961 85 14ms 22 Oct 2023 65th Betuaredead 961 85 15ms 12 Nov 2023 65th jakobkordez 🇸🇮 961 85 15ms 16 Nov 2023 65th bizy-coder 961 85 17ms 24 Nov 2023 65th bzijlema 🇳🇱 961 85 15ms 28 Nov 2023 65th quimey 961 85 14ms 30 Nov 2023 65th fuzzylojik-golf 🇺🇸 961 85 14ms 9 Dec 2023 65th rucin93 🇵🇱 961 85 14ms 16 Jan 2024 65th sean-niemann 🇺🇸 961 85 14ms 16 Jan 2024 65th AlephSquirrel 961 85 14ms 21 Jan 2024 65th mathisfun271 961 85 37ms 2 Feb 2024 65th fourth-bit 961 85 15ms 14 Mar 2024 65th Bulmenisaurus 961 85 13ms 1 Jul 2024 65th MeWhenI 🇻🇦 961 85 14ms 13 Jul 2024 65th jipsong 🇩🇪 961 85 14ms 25 Jul 2024 65th khvdm 961 85 14ms 14 Aug 2024 65th b-illy 🇬🇧 961 85 13ms 15 Aug 2024 65th CaedenHarper 🇨🇦 961 85 15ms 23 Aug 2024 65th davecame 961 85 14ms 18 Sep 2024 65th edsrzf 🇳🇿 961 85 14ms 19 Sep 2024 65th emgordon154 961 85 14ms 29 Sep 2024 65th lifthrasiir 🇰🇷 961 85 37ms 13 Nov 2024 65th GolfingSuccess 🇬🇷 961 85 13ms 30 Dec 2024 65th ryyyn 🇺🇸 961 85 14ms 7 Jan 2025 65th bricknellj 961 85 13ms 19 Jan 2025 65th 4atj 961 85 14ms 30 Jun 2025 65th KasperKivimaeki 🇫🇮 961 85 14ms 2 Jul 2025 65th dirckvdende 961 85 13ms 7 Jul 2025 65th duckyluuk 🇳🇱 961 85 14ms 8 Jul 2025 65th lukegustafson 🇺🇸 961 85 19ms 9 Jul 2025 65th wuduculfre 961 85 14ms 21 Jul 2025 65th qpwoeirut 961 85 13ms 10 Aug 2025 65th BREMAUCY 🇫🇷 961 85 14ms 11 Aug 2025 65th InigoK 🇺🇸 961 85 15ms 29 Aug 2025 65th KapelMeister 961 85 13ms 30 Aug 2025 65th ahmetdemirag 🇨🇾 961 85 35ms 1 Oct 2025 65th CornerMercury 🇬🇧 961 85 14ms 27 Oct 2025 65th ndren 961 85 14ms 27 Oct 2025 65th snoozingnewt 🇨🇦 961 85 14ms 21 Nov 2025 65th CommandLeo 🇮🇹 961 85 16ms 23 Nov 2025 65th HPWiz 🇳🇿 961 85 14ms 26 Nov 2025 65th Babafaba 961 85 15ms 26 Nov 2025 65th sunleonid 961 85 14ms 26 Nov 2025 65th FortuiteMan 🇫🇷 961 85 14ms 3 Dec 2025 65th Languag3 961 85 17ms 5 Dec 2025 65th blaztoma 🇱🇹 961 85 14ms 7 Dec 2025 65th Lv0Sys 🇵🇱 961 85 15ms 8 Dec 2025 65th DialFrost 🇸🇬 961 85 14ms 14 Dec 2025 65th Bmrl7 961 85 16ms 21 Dec 2025 65th Flekay 🇩🇪 961 85 14ms 12 Feb 2026 65th dokutan 961 85 13ms 14 Feb 2026 144th Lydxn 🇨🇦 949 71 56ms 25 May 2023 144th nwellnhof 🇩🇪 949 71 50ms 25 May 2023 144th sean-niemann 🇺🇸 949 71 51ms 25 May 2023 144th dmrichwa 🇺🇸 949 71 50ms 25 May 2023 144th inventshah 949 71 49ms 26 May 2023 144th Steffan153 🇫🇮 949 71 57ms 26 May 2023 144th JayXon 🇺🇸 949 71 52ms 26 May 2023 144th Irratix 🇳🇱 949 71 48ms 26 May 2023 144th rucin93 🇵🇱 949 71 62ms 26 May 2023 144th Argeento 🇵🇱 949 71 49ms 26 May 2023 144th akshatj27 🇦🇶 949 71 51ms 26 May 2023 144th emplv 🇱🇻 949 71 51ms 26 May 2023 144th Nicronmil 949 71 50ms 1 Jun 2023 144th Maznek 949 71 51ms 9 Jun 2023 144th BambooleanLogic 🇸🇪 949 71 50ms 27 Jun 2023 144th biocommando 🇫🇮 949 71 52ms 10 Aug 2023 144th stefangimmillaro 949 71 58ms 20 Aug 2023 First Prev 81–160 of 1,511 Next Last