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 558th sean-niemann 🇺🇸 929 65 4ms 29 May 2025 562nd Steffan153 🇫🇮 929 84 2ms 13 Feb 2026 563rd janlelis 928 80 42ms 22 Nov 2021 563rd JayXon 🇺🇸 928 80 39ms 23 Nov 2021 563rd nwellnhof 🇩🇪 928 80 37ms 5 Dec 2021 563rd emgordon154 928 80 38ms 19 Dec 2021 563rd sisyphus-ppcg 🇦🇺 928 80 42ms 30 Dec 2022 563rd Steffan153 🇫🇮 928 80 39ms 20 Jul 2024 569th SirBogman 🇺🇸 928 81 1,172ms 14 Sep 2025 570th Sakisan 🇧🇪 927 81 1,444ms 14 Jul 2022 571st Shanethegamer 🇺🇸 926 86 1ms 2 Nov 2022 571st inventshah 926 86 1ms 2 Nov 2022 571st pardouin 🇫🇷 926 86 2ms 17 Aug 2024 571st GolfingSuccess 🇬🇷 926 86 1ms 16 Oct 2024 571st DialFrost 🇸🇬 926 86 2ms 21 Dec 2024 571st snoozingnewt 🇨🇦 926 86 1ms 7 Oct 2025 571st albanian-laundromat 926 86 2ms 19 Dec 2025 578th pardouin 🇫🇷 926 98 126ms 17 Aug 2024 579th JayXon 🇺🇸 926 104 158ms 23 Nov 2021 580th primo-ppcg 🇹🇭 925 99 40ms 26 Apr 2025 580th marshallward 🇺🇸 925 99 40ms 6 May 2025 582nd sisyphus-ppcg 🇦🇺 925 105 2ms 15 Sep 2022 583rd clockworknazo 925 107 9ms 23 Oct 2022 583rd GrayJoKing 🇦🇺 925 107 9ms 16 Jul 2024 585th Steffan153 🇫🇮 925 108 13ms 17 Jun 2024 585th kg583 🇺🇸 925 108 13ms 17 days ago 587th primo-ppcg 🇹🇭 925 118 40ms 7 Jul 2022 588th JayXon 🇺🇸 924 83 1,280ms 3 Apr 2024 588th Steffan153 🇫🇮 924 83 1,283ms 4 Apr 2024 588th sean-niemann 🇺🇸 924 83 1,330ms 3 Oct 2025 591st lynn 924 102 1,317ms 28 Nov 2021 592nd error256 924 104 71ms 29 Nov 2024 593rd JayXon 🇺🇸 923 108 2,773ms 10 Dec 2024 594th m-tkach 🇺🇦 923 130 62ms 18 Jan 2022 594th snyderek 🇺🇸 923 130 64ms 17 Oct 2024 596th emplv 🇱🇻 922 84 11ms 22 Nov 2021 596th SirBogman 🇺🇸 922 84 12ms 24 Nov 2021 596th uttumuttu 🇫🇮 922 84 11ms 4 Jan 2022 596th Steffan153 🇫🇮 922 84 11ms 31 Dec 2022 596th vlpx 🇫🇮 922 84 12ms 1 Aug 2024 596th sean-niemann 🇺🇸 922 84 11ms 12 Jan 2025 596th rucin93 🇵🇱 922 84 12ms 18 Feb 2025 603rd kg583 🇺🇸 922 119 24ms 11 Oct 2024 604th dokutan 922 135 409ms 24 Sep 2025 604th Shanethegamer 🇺🇸 922 135 443ms 25 Sep 2025 604th Yewzir 🇧🇪 922 135 382ms 2 Oct 2025 604th namelessiw 922 135 493ms 4 Oct 2025 604th stefangimmillaro 922 135 486ms 6 Oct 2025 604th h3ra993huskp 🇯🇵 922 135 470ms 30 Nov 2025 610th Sp3000 🇦🇺 921 86 13ms 23 Nov 2021 611th inventshah 921 92 100ms 12 Dec 2022 611th SirBogman 🇺🇸 921 92 94ms 12 Dec 2022 611th Alessandro-Balconi 🇮🇹 921 92 90ms 18 Dec 2022 611th snoozingnewt 🇨🇦 921 92 86ms 20 Oct 2023 611th DialFrost 🇸🇬 921 92 99ms 20 Oct 2023 611th byronknoll 🇺🇸 921 92 93ms 17 May 2024 611th pardouin 🇫🇷 921 92 92ms 17 Aug 2024 611th gdagstn 921 92 93ms 21 Aug 2024 611th rboath 921 92 94ms 8 Jan 2025 611th fuzzylojik-golf 🇺🇸 921 92 91ms 26 Sep 2025 621st swbbl 920 76 289ms 5 Feb 2022 621st thed1n 920 76 274ms 9 Jun 2022 621st ehmiiz 🇸🇪 920 76 270ms 21 Jun 2022 621st markroloff 920 76 262ms 24 Jul 2022 621st Clebam 🇫🇷 920 76 280ms 26 Jul 2022 621st KevinLaux 920 76 273ms 2 Nov 2022 621st Tadas 920 76 250ms 23 Feb 2024 621st MarkE0 920 76 266ms 30 Apr 2024 629th PhysicDev 🇫🇷 920 89 11ms 15 Mar 2022 629th martinnorling 🇸🇪 920 89 43ms 20 Jun 2022 629th OllieBoyne 🇬🇧 920 89 11ms 11 Sep 2022 629th randolchance 920 89 11ms 20 Jan 2023 629th jeff-at-tamer-dot-codes 🇺🇸 920 89 10ms 18 May 2023 629th Skwerl23 920 89 11ms 19 May 2023 629th tnecio 920 89 11ms 18 Jun 2024 629th Mabeloid 🇳🇴 920 89 11ms 18 Sep 2024 629th jamiloBBKing 920 89 12ms 27 Jan 2025 629th Pyroan 920 89 12ms 12 Mar 2025 629th davidludwik2370 920 89 12ms 24 Jul 2025 629th cros107 🇦🇺 920 89 11ms 1 Nov 2025 First Prev 561–640 of 3,482 Next Last