The Gray Code Decoder and Gray Code Encoder holes will go live in approximately 92 mins. 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 478th nwellnhof 🇩🇪 940 135 276ms 5 Aug 2024 482nd saito-ta 🇯🇵 939 69 88ms 13 May 2022 483rd DialFrost 🇸🇬 939 80 1,237ms 29 Aug 2025 483rd edsrzf 🇳🇿 939 80 1,026ms 4 Sep 2025 483rd CaedenHarper 🇨🇦 939 80 1,057ms 9 Sep 2025 483rd sean-niemann 🇺🇸 939 80 1,091ms 12 Sep 2025 483rd xsot 🇸🇬 939 80 1,103ms 13 Nov 2025 483rd Yewzir 🇧🇪 939 80 1,155ms 16 Nov 2025 483rd Steffan153 🇫🇮 939 80 1,156ms 13 Feb 2026 490th Icemont 🇬🇪 939 86 11ms 4 Oct 2024 490th eclyptox 939 86 10ms 18 Oct 2024 492nd IanUtley 939 92 18ms 6 Oct 2023 493rd HPWiz 🇳🇿 938 80 1,412ms 25 Nov 2025 494th Natanaelel 🇸🇪 938 102 135ms 18 May 2025 494th ovs-code 🇩🇪 938 102 171ms 9 Jan 2026 496th sisyphus-ppcg 🇦🇺 937 51 68ms 25 Jul 2022 496th lynn 937 51 57ms 25 Jul 2022 496th clockworknazo 937 51 58ms 16 Aug 2022 496th SirBogman 🇺🇸 937 51 64ms 10 Sep 2022 496th Steffan153 🇫🇮 937 51 57ms 17 Mar 2023 496th Natanaelel 🇸🇪 937 51 61ms 18 May 2025 496th sean-niemann 🇺🇸 937 51 55ms 27 Jun 2025 503rd 09cf 937 128 430ms 25 Dec 2023 503rd KasperKivimaeki 🇫🇮 937 128 425ms 3 Nov 2025 503rd emgordon154 937 128 66ms 7 Nov 2025 506th rak1507 🇬🇧 936 52 3ms 21 Jan 2022 507th pardouin 🇫🇷 936 82 1,254ms 17 Aug 2025 508th sultan 936 133 541ms 3 Oct 2025 508th AvyYang 936 133 540ms 3 Oct 2025 508th Urkair 936 133 552ms 3 Oct 2025 511th btjones0 935 83 442ms 11 Mar 2024 511th JunkIce 935 83 434ms 3 Dec 2024 511th Stockoh 🇫🇷 935 83 453ms 10 Apr 2025 511th Andrey2001 935 83 379ms 28 Nov 2025 511th JOrE20 935 83 398ms 26 Feb 2026 516th Steffan153 🇫🇮 935 91 100ms 19 Mar 2023 517th JayXon 🇺🇸 935 97 118ms 27 Nov 2021 517th primo-ppcg 🇹🇭 935 97 127ms 2 Apr 2022 517th Lydxn 🇨🇦 935 97 120ms 2 Apr 2022 520th 09cf 934 104 2ms 25 Dec 2023 521st Lydxn 🇨🇦 933 83 11ms 19 Sep 2022 522nd MeWhenI 🇻🇦 933 85 9ms 16 Dec 2024 522nd GolfingSuccess 🇬🇷 933 85 10ms 24 Dec 2024 524th Steffan153 🇫🇮 933 136 319ms 15 Jul 2024 525th prplz 🇦🇺 932 75 264ms 13 Dec 2021 525th lynn 932 75 295ms 16 Jul 2023 525th dcgjb 932 75 277ms 17 Jan 2024 525th IISResetMe 932 75 276ms 9 Mar 2024 525th Jaykul 932 75 269ms 12 May 2024 530th GrayJoKing 🇦🇺 932 85 8ms 22 Aug 2023 531st prplz 🇦🇺 932 102 125ms 19 Oct 2022 531st JayXon 🇺🇸 932 102 115ms 19 Oct 2022 533rd Lydxn 🇨🇦 932 103 3ms 12 Sep 2022 533rd btnlq 932 103 3ms 12 Sep 2022 533rd JayXon 🇺🇸 932 103 2ms 12 Sep 2022 533rd Steffan153 🇫🇮 932 103 3ms 21 days ago 537th lukegustafson 🇺🇸 931 80 149ms 29 May 2025 538th MeWhenI 🇻🇦 931 91 89ms 13 Dec 2022 539th Steffan153 🇫🇮 931 105 100ms 24 Feb 2023 539th JayXon 🇺🇸 931 105 90ms 24 Feb 2023 539th MeWhenI 🇻🇦 931 105 84ms 8 Mar 2023 539th sean-niemann 🇺🇸 931 105 101ms 1 Jan 2025 539th kaascevich 931 105 91ms 21 Jul 2025 544th SirBogman 🇺🇸 930 59 163ms 21 Nov 2021 544th SirFireball3521 930 59 169ms 16 Mar 2023 546th chayleaf 930 88 42ms 7 Jan 2022 546th mhenion8293 🇺🇸 930 88 11ms 23 Jan 2022 546th henrytranter 930 88 41ms 25 Jan 2022 546th Andriamanitra 🇫🇮 930 88 12ms 14 Jul 2022 546th Kacarott 🇦🇺 930 88 12ms 20 Sep 2023 546th keelimeguy 🇺🇸 930 88 43ms 14 Oct 2023 546th bzijlema 🇳🇱 930 88 11ms 2 Nov 2023 546th fbe 930 88 37ms 14 Dec 2024 546th albanian-laundromat 930 88 10ms 1 Sep 2025 546th TheSecondComing123 930 88 11ms 5 Feb 2026 556th JayXon 🇺🇸 930 114 422ms 6 Mar 2022 556th Lydxn 🇨🇦 930 114 432ms 7 Mar 2022 556th Steffan153 🇫🇮 930 114 486ms 21 Jul 2024 556th sean-niemann 🇺🇸 930 114 452ms 28 Dec 2024 560th GrayJoKing 🇦🇺 929 65 9ms 28 Mar 2022 First Prev 481–560 of 3,484 Next Last