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 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 145th stefangimmillaro 950 71 58ms 20 Aug 2023 145th sbatllori 950 71 55ms 25 Aug 2023 145th coreynash 950 71 60ms 19 Sep 2023 145th ovs-code 🇩🇪 950 71 56ms 29 Sep 2023 145th Davr1 🇨🇿 950 71 58ms 15 Oct 2023 145th sisyphus-ppcg 🇦🇺 950 71 62ms 1 Nov 2023 145th lukegustafson 🇺🇸 950 71 51ms 22 Nov 2023 145th chartung17 950 71 50ms 10 Dec 2023 145th danielphilpottwork 950 71 55ms 20 Dec 2023 145th keizure 🇨🇳 950 71 58ms 12 Jan 2024 145th olleicua 🇺🇸 950 71 57ms 13 Jan 2024 145th weliveinhell 🇭🇹 950 71 58ms 21 Jan 2024 145th two-bad 🇬🇧 950 71 50ms 3 Feb 2024 145th xsot 🇸🇬 950 71 51ms 3 Feb 2024 145th voytxt 🇨🇿 950 71 53ms 4 Feb 2024 145th helbling 🇨🇭 950 71 50ms 27 Feb 2024 145th mamamia5x 950 71 51ms 8 Mar 2024 145th aopedal 950 71 49ms 14 Mar 2024 145th unfinishedprogram 950 71 51ms 3 May 2024 145th junkondo-jp 950 71 50ms 5 May 2024 145th TheLastZombie 950 71 55ms 15 May 2024 145th FlorianCassayre 🇫🇷 950 71 52ms 20 May 2024 145th KatieLG 🇬🇧 950 71 54ms 9 Jun 2024 145th vlpx 🇫🇮 950 71 54ms 18 Jun 2024 145th pardouin 🇫🇷 950 71 57ms 24 Jul 2024 145th GrayJoKing 🇦🇺 950 71 54ms 12 Aug 2024 145th kpal81xd 950 71 57ms 1 Sep 2024 145th edsrzf 🇳🇿 950 71 53ms 21 Sep 2024 145th xyangst 950 71 54ms 23 Sep 2024 145th b-illy 🇬🇧 950 71 54ms 29 Sep 2024 145th duckyluuk 🇳🇱 950 71 52ms 3 Oct 2024 145th Andrey-Plotnikov 950 71 50ms 10 Nov 2024 145th CaedenHarper 🇨🇦 950 71 64ms 19 Nov 2024 145th SiddharthShyniben 950 71 51ms 1 Dec 2024 145th targrik 950 71 51ms 5 Feb 2025 145th qpwoeirut 950 71 54ms 7 Feb 2025 145th kirjavascript 950 71 59ms 13 Feb 2025 145th MeWhenI 🇻🇦 950 71 51ms 13 Mar 2025 145th fuzzylojik-golf 🇺🇸 950 71 57ms 29 May 2025 145th JOrE20 950 71 53ms 15 Nov 2025 145th snoozingnewt 🇨🇦 950 71 54ms 7 Dec 2025 145th CornerMercury 🇬🇧 950 71 55ms 7 Dec 2025 145th Lv0Sys 🇵🇱 950 71 53ms 8 Dec 2025 145th DialFrost 🇸🇬 950 71 51ms 14 Dec 2025 145th iamsterdam800 950 71 51ms 1 Feb 2026 145th Natanaelel 🇸🇪 950 71 50ms 4 days ago 145th smclaughlin-cf 950 71 48ms 3 days ago 208th Steffan153 🇫🇮 943 40 34ms 25 Dec 2023 208th janlelis 943 40 37ms 25 Dec 2023 208th JayXon 🇺🇸 943 40 37ms 25 Dec 2023 208th ovs-code 🇩🇪 943 40 37ms 25 Dec 2023 208th Lydxn 🇨🇦 943 40 39ms 29 Dec 2023 208th 4hg 🇺🇸 943 40 36ms 8 Jan 2024 208th xsot 🇸🇬 943 40 37ms 31 Jan 2024 208th sisyphus-ppcg 🇦🇺 943 40 37ms 29 Apr 2024 208th radarek 🇵🇱 943 40 41ms 7 Jul 2024 208th nwellnhof 🇩🇪 943 40 40ms 24 Sep 2024 208th sean-niemann 🇺🇸 943 40 38ms 20 Dec 2024 208th stefangimmillaro 943 40 39ms 23 May 2025 208th pardouin 🇫🇷 943 40 37ms 1 Sep 2025 208th D-MOVE 🇵🇭 943 40 40ms 8 Dec 2025 208th denkyuu1 943 40 38ms 5 Feb 2026 208th Natanaelel 🇸🇪 943 40 41ms 7 days ago 224th jmerle 🇳🇱 941 17 242ms 15 Jun 2023 224th Yewzir 🇧🇪 941 17 240ms 9 Apr 2024 224th xyangst 941 17 258ms 15 Oct 2024 224th ZakkkkAttackkkk 🇵🇭 941 17 278ms 25 Feb 2025 224th blaztoma 🇱🇹 941 17 245ms 19 Oct 2025 224th Emutis 🇱🇹 941 17 285ms 19 Oct 2025 224th CrookedJ 941 17 227ms 2 Dec 2025 231st yzhs 🇩🇪 939 87 14ms 22 Jun 2023 231st NewDefectus 🇮🇱 939 87 14ms 19 Aug 2023 231st Emutis 🇱🇹 939 87 15ms 7 Dec 2025 234th Shanethegamer 🇺🇸 936 72 52ms 26 May 2023 234th jared-hughes 936 72 52ms 28 Jul 2023 234th iczelia 🇩🇪 936 72 55ms 16 Jan 2026 237th btnlq 934 63 445ms 17 Apr 2023 237th JayXon 🇺🇸 934 63 464ms 18 Apr 2023 237th nwellnhof 🇩🇪 934 63 406ms 19 Apr 2023 237th primo-ppcg 🇹🇭 934 63 414ms 21 Apr 2023 First Prev 161–240 of 1,513 Next Last