The Gray Code Decoder and Gray Code Encoder holes will go live in approximately 7 days. Why not try and solve them ahead of time?
Spelling Numbers 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 76th c0d3-4-F00d 🇩🇪 941 51 9ms 2 Jun 2021 76th klixel 🇨🇦 941 51 11ms 27 Oct 2024 83rd JayXon 🇺🇸 938 287 13ms 27 Jul 2025 84th Steffan153 🇫🇮 926 100 31ms 12 Dec 2023 84th edsrzf 🇳🇿 926 100 21ms 5 Oct 2024 84th emgordon154 926 100 30ms 11 Dec 2024 84th GolfingSuccess 🇬🇷 926 100 20ms 28 Feb 2025 84th sean-niemann 🇺🇸 926 100 30ms 17 Aug 2025 84th DialFrost 🇸🇬 926 100 19ms 2 Jan 2026 84th kg583 🇺🇸 926 100 20ms 19 Feb 2026 91st dokutan 917 101 30ms 5 May 2024 91st error256 917 101 31ms 8 Jun 2025 93rd tomtheisen 🇺🇸 912 295 12ms 17 Oct 2020 93rd janlelis 912 295 13ms 15 Aug 2022 93rd Shanethegamer 🇺🇸 912 295 10ms 17 Dec 2024 96th JayXon 🇺🇸 909 189 434ms 5 Feb 2026 97th emplv 🇱🇻 909 296 11ms 3 Jun 2024 98th GrayJoKing 🇦🇺 907 137 197ms 9 Aug 2023 99th duikboot 906 53 10ms 28 Apr 2018 100th MeWhenI 🇻🇦 906 265 646ms 7 Nov 2025 101st Steffan153 🇫🇮 905 210 35ms 15 Jul 2024 102nd MeWhenI 🇻🇦 905 264 78ms 15 Mar 2025 103rd AdrienHache 🇫🇷 904 326 461ms 19 days ago 104th Irratix 🇳🇱 903 298 11ms 7 Dec 2020 104th uttumuttu 🇫🇮 903 298 10ms 8 Apr 2022 104th rucin93 🇵🇱 903 298 11ms 9 Jun 2023 104th Argeento 🇵🇱 903 298 11ms 25 Aug 2023 104th vlpx 🇫🇮 903 298 12ms 1 Aug 2024 109th JayXon 🇺🇸 902 327 428ms 24 Jul 2025 110th sean-niemann 🇺🇸 900 299 12ms 4 Aug 2024 111th m-tkach 🇺🇦 899 103 28ms 3 Feb 2024 111th Shanethegamer 🇺🇸 899 103 28ms 8 Apr 2024 113th sean-niemann 🇺🇸 897 212 35ms 5 Feb 2026 114th edsrzf 🇳🇿 894 113 44ms 7 Apr 2025 115th KasperKivimaeki 🇫🇮 893 368 4ms 17 Mar 2025 116th JayXon 🇺🇸 892 152 911ms 12 Mar 2023 117th kg583 🇺🇸 892 213 35ms 23 Nov 2024 118th neihousaigaai 891 302 11ms 19 Mar 2021 119th saito-ta 🇯🇵 890 199 13ms 2 Feb 2024 120th pardouin 🇫🇷 888 214 35ms 23 Feb 2024 120th Seek64 🇩🇪 888 214 15ms 18 Mar 2025 122nd kg583 🇺🇸 887 114 39ms 14 Feb 2025 122nd GolfingSuccess 🇬🇷 887 114 43ms 8 Mar 2025 124th solmyr2000 887 391 527ms 18 Jun 2022 125th Lydxn 🇨🇦 886 153 918ms 12 Mar 2023 126th bitsandbeyond 🇳🇱 886 279 288ms 7 May 2025 127th HPWiz 🇳🇿 885 335 229ms 13 Jul 2023 128th Shanethegamer 🇺🇸 883 310 11ms 18 Mar 2024 129th lynn 883 336 228ms 30 Mar 2021 130th Shanethegamer 🇺🇸 883 372 4ms 19 Jun 2022 131st Shanethegamer 🇺🇸 883 393 456ms 19 Jun 2022 132nd MeWhenI 🇻🇦 882 105 20ms 12 Apr 2024 133rd nwellnhof 🇩🇪 881 141 210ms 15 Jan 2022 134th janlelis 881 271 39ms 16 Aug 2022 135th 5cw 🇺🇸 880 216 21ms 9 Nov 2024 136th primo-ppcg 🇹🇭 880 311 10ms 4 Jul 2023 137th kkoenig 878 416 292ms 10 Sep 2025 138th bizy-coder 877 196 638ms 17 Jan 2024 139th saito-ta 🇯🇵 877 199 2,097ms 30 Jan 2024 140th user189032 877 307 15ms 29 May 2019 141st Shanethegamer 🇺🇸 877 385 3ms 27 Oct 2024 142nd GrayJoKing 🇦🇺 876 217 40ms 9 Aug 2023 143rd JayXon 🇺🇸 876 407 261ms 15 Oct 2025 143rd acotis 876 407 231ms 18 Oct 2025 145th primo-ppcg 🇹🇭 874 308 10ms 1 Oct 2021 145th MeWhenI 🇻🇦 874 308 11ms 8 Mar 2025 147th KasperKivimaeki 🇫🇮 874 397 469ms 19 Nov 2025 148th MostParsingVex 873 55 11ms 23 Oct 2024 149th primo-ppcg 🇹🇭 869 143 136ms 5 Oct 2020 150th canissimia 🇦🇶 869 249 3ms 4 Jan 2026 151st MeWhenI 🇻🇦 869 278 1,427ms 17 Aug 2022 152nd antimon2 🇯🇵 869 279 1,614ms 23 Nov 2023 153rd b-illy 🇬🇧 868 219 36ms 2 Aug 2024 154th ovs-code 🇩🇪 867 237 35ms 17 Jan 2025 155th Shanethegamer 🇺🇸 867 340 422ms 26 Mar 2024 156th ovs-code 🇩🇪 867 379 4ms 11 Feb 2024 157th canissimia 🇦🇶 866 220 2,850ms 20 Mar 2023 158th janlelis 866 279 1,286ms 17 Aug 2022 159th nathanadams 🇳🇿 865 311 10ms 20 Sep 2021 160th sisyphus-ppcg 🇦🇺 864 205 6ms 2 Feb 2024 First Prev 81–160 of 1,083 Next Last