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?
Foo Fizz Buzz Bar 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 881st Yewzir 🇧🇪 897 87 2ms 18 Jan 2024 882nd inventshah 897 107 3ms 12 Sep 2022 883rd rvdnieuwendijk 🇳🇱 896 78 282ms 27 Nov 2021 884th lifthrasiir 🇰🇷 896 142 8ms 24 Nov 2024 885th olivermrose 🇺🇸 895 83 37ms 23 Nov 2021 886th SirBogman 🇺🇸 895 129 4ms 16 Jul 2023 887th inventshah 895 134 433ms 26 Jan 2023 888th TeodorDyakov 🇧🇬 895 139 502ms 9 Jan 2026 889th sisyphus-ppcg 🇦🇺 894 114 2ms 12 Mar 2022 889th NickTheEASDude 🇺🇸 894 114 2ms 9 May 2024 891st Kacarott 🇦🇺 892 87 510ms 10 Sep 2024 892nd dokutan 892 112 15ms 4 May 2024 893rd Steffan153 🇫🇮 892 121 4ms 10 days ago 893rd MeWhenI 🇻🇦 892 121 4ms 9 days ago 895th emgordon154 891 109 3ms 30 Dec 2021 895th m-tkach 🇺🇦 891 109 3ms 17 Jan 2022 895th inventshah 891 109 2ms 20 May 2023 898th janbehrens 🇩🇪 890 87 15ms 23 Nov 2021 898th igmcdowell 890 87 11ms 23 Nov 2021 898th ScottHamper 890 87 12ms 17 Dec 2021 898th Jazcash 890 87 13ms 22 Mar 2022 898th LukeBridges 🇬🇧 890 87 10ms 24 Oct 2022 898th Ephellon 890 87 12ms 2 Dec 2022 898th PatrickStephansen 🇿🇦 890 87 12ms 14 Dec 2022 898th Mazn3k 890 87 12ms 14 Feb 2023 898th a1exeysv 🇺🇦 890 87 11ms 15 Mar 2023 898th unfinishedprogram 890 87 12ms 30 Jun 2023 898th dylanarmstrong 890 87 12ms 14 Dec 2023 898th pardouin 🇫🇷 890 87 12ms 17 Aug 2024 898th duckyluuk 🇳🇱 890 87 11ms 3 Oct 2024 898th XenThe 🇬🇧 890 87 11ms 15 Jul 2025 898th helbling 🇨🇭 890 87 12ms 13 Aug 2025 898th Yax42 🇫🇷 890 87 13ms 19 Jan 2026 898th Lv0Sys 🇵🇱 890 87 11ms 27 Feb 2026 915th tbadun 890 92 11ms 8 Oct 2022 915th b10011 🇫🇮 890 92 43ms 21 Dec 2022 915th gareth-kmet 890 92 11ms 2 Mar 2023 915th cphayash 890 92 11ms 14 Mar 2023 915th mnurzia 890 92 11ms 13 Oct 2023 915th msrawsonwork 890 92 12ms 1 Mar 2024 915th ComputerKWasTaken 🇺🇸 890 92 11ms 8 Jun 2024 915th wuzekai518 890 92 11ms 17 Jun 2024 915th Apzyte-Gamer 890 92 11ms 22 Sep 2024 915th DearDanielr 890 92 12ms 3 Oct 2024 915th charlieboi0 🇧🇸 890 92 12ms 10 Nov 2024 926th inventshah 890 112 2,662ms 10 Nov 2024 927th canissimia 🇦🇶 890 320 32ms 22 Nov 2023 928th Steffan153 🇫🇮 889 106 1,316ms 3 Jan 2023 929th Shanethegamer 🇺🇸 889 108 3ms 12 Sep 2022 929th albanian-laundromat 889 108 3ms 27 Aug 2025 931st emgordon154 889 140 383ms 9 Feb 2026 932nd ovs-code 🇩🇪 889 143 8ms 7 Jul 2024 933rd sisyphus-ppcg 🇦🇺 889 147 4ms 15 Jan 2025 934th SirBogman 🇺🇸 888 68 3ms 21 Nov 2021 934th MeWhenI 🇻🇦 888 68 4ms 22 Nov 2021 934th Shanethegamer 🇺🇸 888 68 3ms 22 Nov 2021 934th janbehrens 🇩🇪 888 68 3ms 22 Nov 2021 934th inventshah 888 68 3ms 25 Nov 2021 934th ejini6969 888 68 3ms 1 Apr 2023 934th MaliPatuljak 888 68 4ms 18 Apr 2023 934th Natanaelel 🇸🇪 888 68 3ms 2 May 2023 934th byronknoll 🇺🇸 888 68 3ms 17 May 2024 934th pardouin 🇫🇷 888 68 3ms 17 Aug 2024 934th charliegaming 888 68 3ms 21 Oct 2024 934th DialFrost 🇸🇬 888 68 3ms 12 Jan 2025 946th Shanethegamer 🇺🇸 888 110 113ms 15 Oct 2022 947th Steffan153 🇫🇮 888 130 4ms 19 Jul 2023 948th primo-ppcg 🇹🇭 887 73 89ms 13 May 2022 949th primo-ppcg 🇹🇭 887 86 6ms 16 Aug 2023 950th ovs-code 🇩🇪 887 88 3ms 11 Oct 2023 951st btnlq 887 115 2ms 25 Dec 2022 952nd JayXon 🇺🇸 886 108 131ms 28 Nov 2021 952nd exodrifter 🇺🇸 886 108 150ms 25 Oct 2022 952nd tobeannouncd 886 108 143ms 1 Jan 2024 955th primo-ppcg 🇹🇭 886 167 78ms 10 May 2023 956th MeWhenI 🇻🇦 886 188 1,425ms 28 Mar 2025 956th emgordon154 886 188 1,466ms 8 Jul 2025 958th GrayJoKing 🇦🇺 885 52 35ms 21 Nov 2021 959th SirBogman 🇺🇸 885 55 2ms 15 Dec 2023 959th emgordon154 885 55 3ms 3 Nov 2024 First Prev 881–960 of 3,482 Next Last