The Gray Code Decoder and Gray Code Encoder holes will go live in approximately 4 days. Why not try and solve them ahead of time?
ASCII Table 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 241st JayXon 🇺🇸 886 85 34ms 28 Nov 2023 242nd DialFrost 🇸🇬 886 132 107ms 2 Dec 2025 243rd orthoplex 🇨🇽 885 97 9ms 30 Mar 2022 243rd duckyluuk 🇳🇱 885 97 10ms 7 Jul 2025 245th sean-niemann 🇺🇸 885 102 6ms 8 Jun 2025 246th nwellnhof 🇩🇪 885 187 2ms 10 Jul 2022 246th stefangimmillaro 885 187 2ms 17 Jul 2025 248th albanian-laundromat 884 146 2ms 22 Dec 2025 249th jacobly0 🇺🇸 884 190 1,675ms 22 Apr 2024 250th snobee 🇨🇦 882 153 162ms 12 Dec 2022 250th kiyov09 🇲🇽 882 153 157ms 14 Mar 2023 252nd edsrzf 🇳🇿 881 67 38ms 6 Nov 2025 253rd sean-niemann 🇺🇸 881 123 7ms 18 Aug 2025 254th Yax42 🇫🇷 881 147 517ms 5 Oct 2025 255th nwellnhof 🇩🇪 879 86 3ms 16 Jul 2023 256th primo-ppcg 🇹🇭 879 290 10ms 17 May 2025 257th ovs-code 🇩🇪 878 97 1,495ms 26 Nov 2023 258th pardouin 🇫🇷 878 114 2,588ms 8 Nov 2024 258th sean-niemann 🇺🇸 878 114 1ms 11 Apr 2025 260th frankgraziano 878 134 6ms 24 Feb 2026 261st annaproxy 878 139 399ms 1 Apr 2022 262nd GrayJoKing 🇦🇺 877 118 4ms 20 Jul 2023 262nd typeswitch-dev 🇵🇹 877 118 3ms 22 Jul 2023 264th duckyluuk 🇳🇱 876 95 559ms 7 Jul 2025 265th kg583 🇺🇸 876 98 11ms 11 Jan 2026 266th stefangimmillaro 876 154 133ms 4 Jun 2025 267th sean-niemann 🇺🇸 875 151 137ms 8 Dec 2025 268th lynn 874 102 4ms 18 Dec 2024 269th jacobly0 🇺🇸 873 130 1ms 15 Aug 2023 270th itsh01 872 133 9ms 3 Apr 2022 271st MeWhenI 🇻🇦 872 140 400ms 8 Dec 2022 272nd sean-niemann 🇺🇸 872 148 2ms 19 Jan 2025 273rd DialFrost 🇸🇬 871 155 130ms 4 May 2025 273rd The3gs 871 155 126ms 20 Aug 2025 275th edsrzf 🇳🇿 871 163 2ms 12 days ago 276th GrayJoKing 🇦🇺 870 128 76ms 2 Jun 2022 277th MeWhenI 🇻🇦 870 156 108ms 21 Oct 2022 278th bstrat 869 79 2ms 3 Nov 2024 279th dcgjb 869 86 52ms 24 Jan 2024 280th edsrzf 🇳🇿 869 128 395ms 29 Oct 2025 281st ovs-code 🇩🇪 868 122 72ms 12 Sep 2024 282nd GrayJoKing 🇦🇺 867 99 10ms 8 Sep 2023 282nd Rubiksmath 867 99 9ms 8 Sep 2023 282nd StefanHabel 🇨🇦 867 99 10ms 26 days ago 285th annaproxy 867 126 9ms 25 Aug 2023 286th nwellnhof 🇩🇪 866 134 11ms 21 May 2022 286th dcgjb 866 134 10ms 30 Apr 2025 288th janbehrens 🇩🇪 866 141 390ms 24 Apr 2023 289th SirBogman 🇺🇸 863 102 40ms 3 Jun 2025 290th antimon2 🇯🇵 862 97 1,014ms 11 Jan 2025 291st GolfingSuccess 🇬🇷 862 192 2ms 15 May 2022 292nd stefangimmillaro 860 99 1,388ms 2 May 2023 293rd GrayJoKing 🇦🇺 860 150 2ms 11 Sep 2022 294th JRaspass 🇬🇧 859 88 3ms 22 May 2022 295th ImpressedByRocks 859 100 10ms 26 May 2022 296th targrik 859 135 9ms 25 Feb 2025 297th jacobly0 🇺🇸 859 140 61ms 16 Aug 2023 298th nipzu 859 157 130ms 27 Mar 2022 299th Natanaelel 🇸🇪 858 83 101ms 3 Jan 2024 299th sean-niemann 🇺🇸 858 83 115ms 11 Apr 2025 301st Steffan153 🇫🇮 858 110 162ms 27 Jan 2023 302nd AnAwesomGuy 858 151 391ms 10 Jan 2026 303rd pilaf 🇦🇷 856 88 35ms 8 Apr 2022 303rd bajorekp 856 88 34ms 1 Jun 2022 303rd lynn 856 88 33ms 28 Feb 2023 303rd Natanaelel 🇸🇪 856 88 37ms 22 Jun 2023 307th Steffan153 🇫🇮 856 120 1ms 10 Mar 2024 308th jared-hughes 856 137 7ms 7 Jul 2024 309th DialFrost 🇸🇬 855 103 40ms 25 Apr 2025 310th MeWhenI 🇻🇦 855 119 158ms 1 May 2023 311th MeWhenI 🇻🇦 855 121 3ms 15 Jul 2023 312th albanian-laundromat 855 131 40ms 18 Jul 2025 313th MeWhenI 🇻🇦 855 147 29ms 6 Jun 2023 314th SirBogman 🇺🇸 854 88 280ms 28 Mar 2022 315th Kacarott 🇦🇺 854 124 60ms 9 Dec 2025 316th adyache 🇺🇸 854 139 4ms 19 May 2023 317th revlayle 🇺🇸 854 143 401ms 28 Nov 2022 317th Shanethegamer 🇺🇸 854 143 402ms 11 Apr 2023 319th retrohun 853 194 1ms 16 Dec 2022 319th galloj 🇨🇿 853 194 2ms 1 Mar 2023 First Prev 241–320 of 2,336 Next Last