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 480th edsrzf 🇳🇿 939 80 1,060ms 4 Sep 2025 480th CaedenHarper 🇨🇦 939 80 1,108ms 9 Sep 2025 480th sean-niemann 🇺🇸 939 80 1,191ms 12 Sep 2025 480th xsot 🇸🇬 939 80 1,382ms 13 Nov 2025 480th Yewzir 🇧🇪 939 80 1,199ms 16 Nov 2025 480th Steffan153 🇫🇮 939 80 827ms 13 Feb 2026 487th Icemont 🇬🇪 939 86 11ms 4 Oct 2024 487th eclyptox 939 86 10ms 18 Oct 2024 489th IanUtley 939 92 18ms 6 Oct 2023 490th saito-ta 🇯🇵 938 69 88ms 13 May 2022 491st HPWiz 🇳🇿 938 80 1,412ms 25 Nov 2025 492nd Natanaelel 🇸🇪 938 102 135ms 18 May 2025 492nd ovs-code 🇩🇪 938 102 171ms 9 Jan 2026 494th sisyphus-ppcg 🇦🇺 937 51 68ms 25 Jul 2022 494th lynn 937 51 57ms 25 Jul 2022 494th clockworknazo 937 51 58ms 16 Aug 2022 494th SirBogman 🇺🇸 937 51 64ms 10 Sep 2022 494th Steffan153 🇫🇮 937 51 57ms 17 Mar 2023 494th Natanaelel 🇸🇪 937 51 61ms 18 May 2025 494th sean-niemann 🇺🇸 937 51 55ms 27 Jun 2025 501st 09cf 937 128 432ms 25 Dec 2023 501st KasperKivimaeki 🇫🇮 937 128 425ms 3 Nov 2025 501st emgordon154 937 128 67ms 7 Nov 2025 504th rak1507 🇬🇧 936 52 3ms 21 Jan 2022 505th pardouin 🇫🇷 936 82 1,254ms 17 Aug 2025 506th sultan 936 133 541ms 3 Oct 2025 506th AvyYang 936 133 540ms 3 Oct 2025 506th Urkair 936 133 552ms 3 Oct 2025 509th btjones0 935 83 442ms 11 Mar 2024 509th JunkIce 935 83 434ms 3 Dec 2024 509th Stockoh 🇫🇷 935 83 453ms 10 Apr 2025 509th Andrey2001 935 83 379ms 28 Nov 2025 509th JOrE20 935 83 398ms 26 Feb 2026 514th Steffan153 🇫🇮 935 91 100ms 19 Mar 2023 515th JayXon 🇺🇸 935 97 118ms 27 Nov 2021 515th primo-ppcg 🇹🇭 935 97 127ms 2 Apr 2022 515th Lydxn 🇨🇦 935 97 120ms 2 Apr 2022 518th 09cf 934 104 2ms 25 Dec 2023 519th Lydxn 🇨🇦 933 83 12ms 19 Sep 2022 520th MeWhenI 🇻🇦 933 85 9ms 16 Dec 2024 520th GolfingSuccess 🇬🇷 933 85 10ms 24 Dec 2024 522nd Steffan153 🇫🇮 933 136 319ms 15 Jul 2024 523rd prplz 🇦🇺 932 75 264ms 13 Dec 2021 523rd lynn 932 75 295ms 16 Jul 2023 523rd dcgjb 932 75 277ms 17 Jan 2024 523rd IISResetMe 932 75 276ms 9 Mar 2024 523rd Jaykul 932 75 269ms 12 May 2024 528th GrayJoKing 🇦🇺 932 85 8ms 22 Aug 2023 529th prplz 🇦🇺 932 102 125ms 19 Oct 2022 529th JayXon 🇺🇸 932 102 115ms 19 Oct 2022 531st Lydxn 🇨🇦 932 103 3ms 12 Sep 2022 531st btnlq 932 103 3ms 12 Sep 2022 531st JayXon 🇺🇸 932 103 2ms 12 Sep 2022 531st Steffan153 🇫🇮 932 103 3ms 19 days ago 535th lukegustafson 🇺🇸 931 80 149ms 29 May 2025 536th MeWhenI 🇻🇦 931 91 89ms 13 Dec 2022 537th Steffan153 🇫🇮 931 105 102ms 24 Feb 2023 537th JayXon 🇺🇸 931 105 90ms 24 Feb 2023 537th MeWhenI 🇻🇦 931 105 84ms 8 Mar 2023 537th sean-niemann 🇺🇸 931 105 122ms 1 Jan 2025 537th kaascevich 931 105 95ms 21 Jul 2025 542nd SirBogman 🇺🇸 930 59 149ms 21 Nov 2021 542nd SirFireball3521 930 59 151ms 16 Mar 2023 544th chayleaf 930 88 42ms 7 Jan 2022 544th mhenion8293 🇺🇸 930 88 11ms 23 Jan 2022 544th henrytranter 930 88 41ms 25 Jan 2022 544th Andriamanitra 🇫🇮 930 88 12ms 14 Jul 2022 544th Kacarott 🇦🇺 930 88 12ms 20 Sep 2023 544th keelimeguy 🇺🇸 930 88 43ms 14 Oct 2023 544th bzijlema 🇳🇱 930 88 11ms 2 Nov 2023 544th fbe 930 88 37ms 14 Dec 2024 544th albanian-laundromat 930 88 10ms 1 Sep 2025 544th TheSecondComing123 930 88 11ms 5 Feb 2026 554th JayXon 🇺🇸 930 114 422ms 6 Mar 2022 554th Lydxn 🇨🇦 930 114 432ms 7 Mar 2022 554th Steffan153 🇫🇮 930 114 486ms 21 Jul 2024 554th sean-niemann 🇺🇸 930 114 452ms 28 Dec 2024 558th GrayJoKing 🇦🇺 929 65 10ms 28 Mar 2022 558th lynn 929 65 9ms 21 Apr 2022 558th o0lit3 🇺🇸 929 65 9ms 5 Oct 2022 First Prev 481–560 of 3,482 Next Last