The Gray Code Decoder and Gray Code Encoder holes will go live in approximately 14 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 241st FlorianCassayre 🇫🇷 796 79 10ms 19 Sep 2023 241st neel11235813 796 79 11ms 27 Mar 2024 243rd edsrzf 🇳🇿 796 172 36ms 11 hours ago 244th sisyphus-ppcg 🇦🇺 794 140 67ms 26 Jan 2022 245th Frowny 793 29 33ms 26 Jan 2022 246th primo-ppcg 🇹🇭 793 92 2ms 15 Nov 2022 247th emgordon154 791 116 4ms 27 Dec 2024 248th snoozingnewt 🇨🇦 791 140 109ms 21 Nov 2025 249th namelessiw 789 129 417ms 26 Jul 2025 250th ovs-code 🇩🇪 789 143 444ms 4 Mar 2022 250th DialFrost 🇸🇬 789 143 477ms 21 Dec 2023 252nd clockworknazo 789 152 3ms 12 Jul 2023 253rd Lydxn 🇨🇦 787 68 33ms 16 Aug 2022 254th Kacarott 🇦🇺 787 87 67ms 13 Sep 2024 255th NewDefectus 🇮🇱 787 103 9ms 28 Jan 2022 255th akshatj27 🇦🇶 787 103 10ms 28 Jan 2022 257th acotis 787 140 142ms 26 Sep 2025 258th kg583 🇺🇸 786 77 406ms 20 Feb 2024 259th zacjl 786 80 9ms 20 Apr 2023 259th emgordon154 786 80 10ms 12 Apr 2025 261st emgordon154 784 114 2ms 7 Feb 2026 262nd kg583 🇺🇸 784 128 48ms 20 Mar 2025 263rd MarcMush 🇫🇷 783 78 1,277ms 7 Jan 2024 264th emgordon154 783 144 518ms 1 Dec 2025 265th edsrzf 🇳🇿 781 97 797ms 3 hours ago 266th GolfingSuccess 🇬🇷 780 110 2ms 19 Nov 2023 267th primo-ppcg 🇹🇭 780 173 25ms 10 Mar 2022 268th Yewzir 🇧🇪 779 127 6ms 23 Jan 2025 269th stefangimmillaro 778 141 2ms 9 Sep 2022 269th KatieLG 🇬🇧 778 141 2ms 28 Sep 2025 271st Yewzir 🇧🇪 777 115 1ms 17 Feb 2024 271st gastropner 777 115 1ms 14 Jul 2025 273rd SmartK8 🇨🇿 777 131 404ms 30 Oct 2022 273rd tomtheisen 🇺🇸 777 131 375ms 19 Jan 2023 275th GrayJoKing 🇦🇺 776 78 428ms 23 Jul 2024 276th Yax42 🇫🇷 776 150 382ms 13 Jan 2026 276th edsrzf 🇳🇿 776 150 370ms 18 mins ago 278th dokutan 776 171 37ms 15 Jun 2024 279th SirBogman 🇺🇸 774 51 203ms 4 Apr 2022 280th DialFrost 🇸🇬 774 79 1,663ms 14 Jan 2024 281st DialFrost 🇸🇬 774 98 1,495ms 1 Sep 2025 282nd Waffle3z 773 140 2ms 8 Apr 2022 283rd dylanarmstrong 772 105 8ms 17 Jan 2024 284th aksyristos 771 116 2ms 8 Dec 2022 284th GolfingSuccess 🇬🇷 771 116 1ms 19 Nov 2023 284th HumanoidCPU 771 116 1ms 29 Aug 2024 287th sean-niemann 🇺🇸 769 115 5ms 17 Feb 2025 288th HumanoidCPU 768 141 2ms 24 Dec 2025 289th Babafaba 767 82 11ms 28 Nov 2025 290th zacjl 766 79 407ms 5 Oct 2024 290th emgordon154 766 79 441ms 12 Apr 2025 292nd rucin93 🇵🇱 766 112 2ms 18 Nov 2025 293rd JayXon 🇺🇸 764 70 36ms 1 Mar 2023 294th DialFrost 🇸🇬 763 140 107ms 17 Nov 2023 295th Yax42 🇫🇷 760 134 439ms 13 Jan 2026 296th lynn 760 145 138ms 7 Jul 2024 297th m-tkach 🇺🇦 759 147 308ms 1 Aug 2023 298th annaproxy 758 83 10ms 29 Jan 2022 298th QuincyNash 🇺🇸 758 83 10ms 29 Nov 2022 300th ovs-code 🇩🇪 758 207 1,429ms 4 Feb 2025 301st emgordon154 756 98 31ms 23 days ago 302nd xsot 🇸🇬 756 117 4ms 20 May 2025 303rd namelessiw 756 154 513ms 15 Nov 2025 304th emgordon154 754 40 2ms 15 days ago 305th stefangimmillaro 752 102 1,431ms 30 Dec 2024 306th DialFrost 🇸🇬 752 114 2ms 26 Jan 2024 307th UnderKoen 🇳🇱 752 198 2ms 29 Jan 2024 308th RYNO8 751 119 1ms 25 Aug 2023 309th voytxt 🇨🇿 750 108 9ms 26 Jan 2025 310th Yewzir 🇧🇪 750 147 135ms 21 Dec 2023 311th Irratix 🇳🇱 749 84 10ms 7 May 2022 311th ndren 749 84 10ms 25 Jul 2025 313th GrayJoKing 🇦🇺 749 102 77ms 1 Nov 2023 314th edsrzf 🇳🇿 746 123 5ms 26 Feb 2026 315th jared-hughes 746 149 462ms 13 Feb 2023 316th c0d3-4-F00d 🇩🇪 745 120 1ms 11 Feb 2022 317th primo-ppcg 🇹🇭 744 92 62ms 21 Sep 2023 318th edsrzf 🇳🇿 744 133 6ms 3 days ago 319th janlelis 743 72 39ms 21 Sep 2024 319th sean-niemann 🇺🇸 743 72 34ms 30 Dec 2025 First Prev 241–320 of 1,809 Next Last