The Gray Code Decoder and Gray Code Encoder holes will go live in approximately 5 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 79th sean-niemann 🇺🇸 890 120 114ms 17 Feb 2025 82nd kg583 🇺🇸 888 93 8ms 23 hours ago 83rd primo-ppcg 🇹🇭 888 99 40ms 28 Jan 2022 84th ovs-code 🇩🇪 888 113 10ms 12 Nov 2024 85th Steffan153 🇫🇮 888 145 263ms 24 hours ago 86th JayXon 🇺🇸 887 126 409ms 24 Apr 2022 87th btnlq 886 71 9ms 10 Jun 2022 87th orthoplex 🇨🇽 886 71 10ms 1 Oct 2022 87th bricknellj 886 71 9ms 25 Apr 2024 87th JayXon 🇺🇸 886 71 10ms 27 Jun 2024 87th pardouin 🇫🇷 886 71 10ms 12 Jul 2024 87th duckyluuk 🇳🇱 886 71 10ms 15 Aug 2024 87th Steffan153 🇫🇮 886 71 18ms 18 hours ago 94th JayXon 🇺🇸 886 107 149ms 5 Sep 2023 95th 4hg 🇺🇸 885 26 32ms 4 Aug 2023 96th nwellnhof 🇩🇪 885 115 393ms 5 Mar 2023 97th JayXon 🇺🇸 885 125 106ms 3 Apr 2024 98th lynn 885 128 30ms 15 Jun 2024 99th DialFrost 🇸🇬 884 130 1,023ms 26 Feb 2025 100th ovs-code 🇩🇪 883 112 117ms 30 Jan 2024 101st emplv 🇱🇻 883 121 116ms 26 Oct 2022 102nd JayXon 🇺🇸 882 87 2,715ms 12 May 2023 103rd JayXon 🇺🇸 881 109 2,649ms 20 May 2025 104th ovs-code 🇩🇪 881 136 3ms 12 Nov 2024 104th edsrzf 🇳🇿 881 136 16ms 12 hours ago 106th sean-niemann 🇺🇸 881 146 288ms 6 May 2024 107th m-tkach 🇺🇦 881 169 2ms 29 Jan 2024 108th GolfingSuccess 🇬🇷 880 45 46ms 5 Dec 2022 109th lynn 880 121 1,271ms 15 Jun 2024 109th JayXon 🇺🇸 880 121 1,184ms 16 Jun 2024 111th lifthrasiir 🇰🇷 880 171 7ms 19 Dec 2024 112th sean-niemann 🇺🇸 879 151 41ms 14 May 2024 113th Steffan153 🇫🇮 878 129 29ms 13 days ago 114th dvargas46 🇺🇸 877 96 5ms 18 Feb 2023 115th nwellnhof 🇩🇪 877 102 1ms 28 Jan 2022 115th JayXon 🇺🇸 877 102 1ms 30 Jan 2022 115th emplv 🇱🇻 877 102 1ms 27 Apr 2022 118th sisyphus-ppcg 🇦🇺 876 81 3ms 23 Nov 2022 119th emplv 🇱🇻 876 154 57ms 30 Aug 2023 120th JayXon 🇺🇸 875 98 2ms 29 Jan 2024 121st nwellnhof 🇩🇪 875 133 523ms 25 Sep 2025 122nd emplv 🇱🇻 875 147 293ms 26 Feb 2024 123rd MeWhenI 🇻🇦 874 137 9ms 24 Dec 2024 124th ZakkkkAttackkkk 🇵🇭 873 72 11ms 5 Feb 2022 124th TFeld00 🇩🇰 873 72 10ms 19 May 2022 126th pardouin 🇫🇷 873 110 2,595ms 20 May 2025 127th FlyingPenguin223 873 124 1ms 17 Dec 2024 127th sean-niemann 🇺🇸 873 124 1ms 30 May 2025 129th Steffan153 🇫🇮 873 128 113ms 14 hours ago 130th rucin93 🇵🇱 871 93 9ms 19 Jan 2025 130th sean-niemann 🇺🇸 871 93 10ms 8 Apr 2025 132nd MeWhenI 🇻🇦 871 126 2ms 26 Feb 2025 133rd sean-niemann 🇺🇸 871 127 94ms 28 Dec 2024 134th m-tkach 🇺🇦 871 130 30ms 11 Dec 2023 135th ovs-code 🇩🇪 871 136 4ms 19 Jul 2023 136th primo-ppcg 🇹🇭 871 280 11ms 13 Aug 2025 137th Steffan153 🇫🇮 869 87 80ms 23 hours ago 138th edsrzf 🇳🇿 869 106 6ms 26 Feb 2026 139th neel11235813 868 103 1ms 15 Oct 2023 139th lynn 868 103 2ms 15 Jun 2024 141st ovs-code 🇩🇪 868 127 134ms 28 Jun 2023 142nd targrik 867 102 5ms 26 Dec 2025 143rd Steffan153 🇫🇮 866 106 4ms 22 Feb 2024 144th JayXon 🇺🇸 865 70 353ms 27 Jun 2024 144th pardouin 🇫🇷 865 70 406ms 12 Jul 2024 144th Steffan153 🇫🇮 865 70 915ms 18 hours ago 147th Steffan153 🇫🇮 865 86 4ms 18 hours ago 148th btnlq 865 116 10ms 1 Feb 2022 149th Steffan153 🇫🇮 863 135 402ms 24 hours ago 150th DialFrost 🇸🇬 862 94 8ms 24 Jan 2023 151st DialFrost 🇸🇬 862 139 4ms 17 Mar 2025 152nd MeWhenI 🇻🇦 862 155 4ms 1 Jul 2022 153rd emgordon154 862 182 1,432ms 12 hours ago 154th dokutan 862 211 1,688ms 21 Oct 2025 155th lifthrasiir 🇰🇷 861 35 2ms 28 Nov 2024 156th SirBogman 🇺🇸 861 46 40ms 17 Sep 2022 157th Steffan153 🇫🇮 861 159 4ms 19 hours ago 158th ovs-code 🇩🇪 860 104 2ms 12 Feb 2023 158th KasperKivimaeki 🇫🇮 860 104 5ms 11 Nov 2025 160th emgordon154 860 130 111ms 13 hours ago First Prev 81–160 of 1,816 Next Last