The Gray Code Decoder and Gray Code Encoder holes will go live in approximately 34 hours. Why not try and solve them ahead of time?
Number Spiral in all languages in chars. 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 Chars Time Submitted 81st ovs-code 🇩🇪 888 113 10ms 12 Nov 2024 82nd btnlq 886 71 9ms 10 Jun 2022 82nd orthoplex 🇨🇽 886 71 10ms 1 Oct 2022 82nd bricknellj 886 71 9ms 25 Apr 2024 82nd JayXon 🇺🇸 886 71 10ms 27 Jun 2024 82nd pardouin 🇫🇷 886 71 10ms 12 Jul 2024 82nd duckyluuk 🇳🇱 886 71 10ms 15 Aug 2024 88th JayXon 🇺🇸 886 107 149ms 5 Sep 2023 89th 4hg 🇺🇸 885 26 32ms 4 Aug 2023 90th nwellnhof 🇩🇪 885 115 393ms 5 Mar 2023 91st JayXon 🇺🇸 885 125 108ms 3 Apr 2024 92nd JayXon 🇺🇸 885 126 409ms 24 Apr 2022 93rd lynn 885 128 30ms 15 Jun 2024 94th DialFrost 🇸🇬 884 130 1,023ms 26 Feb 2025 95th ovs-code 🇩🇪 883 112 117ms 30 Jan 2024 96th emplv 🇱🇻 883 121 116ms 26 Oct 2022 97th JayXon 🇺🇸 882 87 2,715ms 12 May 2023 98th zacjl 882 114 40ms 13 Feb 2025 99th JayXon 🇺🇸 881 109 2,649ms 20 May 2025 100th Steffan153 🇫🇮 881 146 277ms 26 Feb 2024 100th sean-niemann 🇺🇸 881 146 288ms 6 May 2024 102nd m-tkach 🇺🇦 881 169 2ms 29 Jan 2024 103rd GolfingSuccess 🇬🇷 880 45 46ms 5 Dec 2022 104th lynn 880 121 1,271ms 15 Jun 2024 104th JayXon 🇺🇸 880 121 1,184ms 16 Jun 2024 106th lifthrasiir 🇰🇷 880 171 7ms 19 Dec 2024 107th ovs-code 🇩🇪 879 136 3ms 12 Nov 2024 108th sean-niemann 🇺🇸 879 151 41ms 14 May 2024 109th Steffan153 🇫🇮 878 129 29ms 11 days ago 110th dvargas46 🇺🇸 877 96 5ms 18 Feb 2023 111th sisyphus-ppcg 🇦🇺 876 81 3ms 23 Nov 2022 112th nwellnhof 🇩🇪 876 102 1ms 28 Jan 2022 112th JayXon 🇺🇸 876 102 1ms 30 Jan 2022 112th emplv 🇱🇻 876 102 1ms 27 Apr 2022 115th emplv 🇱🇻 876 154 57ms 30 Aug 2023 116th JayXon 🇺🇸 875 98 1ms 29 Jan 2024 117th nwellnhof 🇩🇪 875 133 523ms 25 Sep 2025 118th emplv 🇱🇻 875 147 293ms 26 Feb 2024 119th MeWhenI 🇻🇦 874 137 9ms 24 Dec 2024 120th ZakkkkAttackkkk 🇵🇭 873 72 11ms 5 Feb 2022 120th TFeld00 🇩🇰 873 72 10ms 19 May 2022 122nd pardouin 🇫🇷 873 110 2,595ms 20 May 2025 123rd FlyingPenguin223 873 124 1ms 17 Dec 2024 123rd sean-niemann 🇺🇸 873 124 1ms 30 May 2025 125th rucin93 🇵🇱 871 93 11ms 19 Jan 2025 125th sean-niemann 🇺🇸 871 93 10ms 8 Apr 2025 127th MeWhenI 🇻🇦 871 126 2ms 26 Feb 2025 128th sean-niemann 🇺🇸 871 127 99ms 28 Dec 2024 129th m-tkach 🇺🇦 871 130 30ms 11 Dec 2023 130th ovs-code 🇩🇪 871 136 4ms 19 Jul 2023 131st primo-ppcg 🇹🇭 871 280 11ms 13 Aug 2025 132nd edsrzf 🇳🇿 869 106 7ms 26 Feb 2026 133rd neel11235813 868 103 1ms 15 Oct 2023 133rd lynn 868 103 2ms 15 Jun 2024 135th targrik 867 102 5ms 26 Dec 2025 136th ovs-code 🇩🇪 867 127 136ms 28 Jun 2023 137th Steffan153 🇫🇮 866 106 4ms 22 Feb 2024 138th emgordon154 866 131 103ms 4 Dec 2025 139th JayXon 🇺🇸 865 70 353ms 27 Jun 2024 139th pardouin 🇫🇷 865 70 406ms 12 Jul 2024 141st btnlq 865 116 10ms 1 Feb 2022 142nd DialFrost 🇸🇬 862 94 11ms 24 Jan 2023 143rd MeWhenI 🇻🇦 862 155 4ms 1 Jul 2022 144th emgordon154 862 183 1,511ms 5 Feb 2025 145th dokutan 862 211 1,688ms 21 Oct 2025 146th lifthrasiir 🇰🇷 861 35 2ms 28 Nov 2024 147th SirBogman 🇺🇸 861 46 40ms 17 Sep 2022 148th ovs-code 🇩🇪 860 104 2ms 12 Feb 2023 148th KasperKivimaeki 🇫🇮 860 104 5ms 11 Nov 2025 150th DialFrost 🇸🇬 860 139 4ms 17 Mar 2025 151st emplv 🇱🇻 859 103 7ms 8 Dec 2025 152nd edsrzf 🇳🇿 859 126 2ms 26 Feb 2026 153rd sisyphus-ppcg 🇦🇺 858 48 203ms 28 Jan 2022 154th Steffan153 🇫🇮 857 162 33ms 10 days ago 155th Gaddy 🇫🇷 855 119 378ms 12 May 2022 156th Yewzir 🇧🇪 855 140 9ms 24 Dec 2024 157th emgordon154 854 213 1,694ms 24 Dec 2025 158th duckyluuk 🇳🇱 853 71 410ms 28 Aug 2024 159th Irratix 🇳🇱 853 95 10ms 29 Jan 2022 160th GrayJoKing 🇦🇺 853 108 7ms 26 Feb 2026 First Prev 81–160 of 1,788 Next Last