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?
Morse Decoder 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 81st JayXon 🇺🇸 916 210 376ms 24 Jan 2025 81st edsrzf 🇳🇿 916 210 324ms 4 Feb 2026 83rd stefangimmillaro 915 122 1,466ms 23 Aug 2024 84th ovs-code 🇩🇪 915 134 540ms 5 Aug 2024 85th Steffan153 🇫🇮 915 136 89ms 11 Jul 2024 86th JayXon 🇺🇸 914 175 172ms 14 Oct 2024 87th hallvabo 🇳🇴 911 142 15ms 15 Feb 2023 88th sean-niemann 🇺🇸 908 112 880ms 30 Aug 2025 89th sisyphus-ppcg 🇦🇺 908 135 535ms 17 Jan 2024 90th JayXon 🇺🇸 906 202 208ms 19 Jan 2023 90th ovs-code 🇩🇪 906 202 132ms 30 Jan 2024 92nd sean-niemann 🇺🇸 905 156 2ms 24 Aug 2025 93rd stefangimmillaro 902 154 598ms 6 Oct 2025 94th edsrzf 🇳🇿 902 161 128ms 22 Dec 2025 95th ovs-code 🇩🇪 902 169 90ms 20 Apr 2024 96th JayXon 🇺🇸 902 175 1,410ms 16 Jan 2023 97th GrayJoKing 🇦🇺 902 191 436ms 17 Mar 2023 98th saito-ta 🇯🇵 901 134 11ms 6 Jun 2022 99th JayXon 🇺🇸 901 178 186ms 24 May 2025 100th primo-ppcg 🇹🇭 900 124 1,383ms 23 Mar 2021 101st ovs-code 🇩🇪 899 113 39ms 22 Feb 2025 101st error256 899 113 36ms 28 May 2025 103rd edsrzf 🇳🇿 898 124 3,251ms 7 Feb 2026 103rd Steffan153 🇫🇮 898 124 3,261ms 13 Feb 2026 105th edsrzf 🇳🇿 898 167 5ms 29 Mar 2025 106th annaproxy 898 184 20ms 16 Jan 2023 107th MeWhenI 🇻🇦 897 192 402ms 27 Jul 2024 108th o0lit3 🇺🇸 896 126 3ms 26 Oct 2020 109th edsrzf 🇳🇿 896 170 30ms 8 Feb 2026 110th Natanaelel 🇸🇪 894 120 35ms 29 Oct 2023 111th dmrichwa 🇺🇸 894 136 11ms 20 Jun 2023 112th sean-niemann 🇺🇸 894 185 1ms 19 Nov 2025 113th stefangimmillaro 891 114 37ms 26 Dec 2024 114th pardouin 🇫🇷 891 125 3,544ms 26 May 2025 115th GrayJoKing 🇦🇺 890 193 4ms 30 Sep 2024 116th sean-niemann 🇺🇸 888 211 2ms 10 Sep 2025 117th prplz 🇦🇺 887 137 12ms 13 Oct 2020 117th 13x1 🇩🇪 887 137 10ms 16 May 2023 117th emplv 🇱🇻 887 137 11ms 22 May 2023 117th vlpx 🇫🇮 887 137 10ms 1 Aug 2024 121st stefangimmillaro 886 146 15ms 6 Feb 2023 121st duckyluuk 🇳🇱 886 146 14ms 26 Jul 2024 123rd primo-ppcg 🇹🇭 883 115 35ms 15 Jan 2023 124th saito-ta 🇯🇵 883 124 7ms 6 Jun 2022 125th stefangimmillaro 882 218 330ms 23 Sep 2024 126th inventshah 881 173 442ms 24 Jan 2023 127th primo-ppcg 🇹🇭 881 219 59ms 25 Jun 2022 128th stefangimmillaro 879 207 39ms 10 Apr 2024 129th stefangimmillaro 877 127 3,251ms 19 Nov 2024 130th primo-ppcg 🇹🇭 877 197 37ms 6 Jul 2022 131st CatsAreFluffy 876 108 51ms 1 Jan 2023 132nd ovs-code 🇩🇪 876 138 4ms 9 Oct 2024 133rd edsrzf 🇳🇿 874 184 9ms 25 Feb 2026 134th edsrzf 🇳🇿 873 289 4ms 22 Feb 2025 135th nwellnhof 🇩🇪 871 175 479ms 3 Jun 2024 136th SirBogman 🇺🇸 871 209 41ms 3 Jun 2025 137th DialFrost 🇸🇬 870 141 505ms 1 Aug 2024 138th Argeento 🇵🇱 868 140 11ms 29 Oct 2023 139th DialFrost 🇸🇬 868 149 10ms 1 Aug 2024 140th inventshah 868 152 2ms 24 Jan 2023 140th nwellnhof 🇩🇪 868 152 2ms 3 Jun 2024 142nd Natanaelel 🇸🇪 863 95 3ms 10 Jun 2023 142nd SirBogman 🇺🇸 863 95 3ms 2 Nov 2023 144th edsrzf 🇳🇿 862 295 1,744ms 8 Apr 2025 145th MeWhenI 🇻🇦 861 211 7ms 8 Aug 2023 146th canissimia 🇦🇶 861 304 10ms 25 Mar 2024 147th lynn 860 102 40ms 19 Oct 2023 148th edsrzf 🇳🇿 859 245 52ms 4 Feb 2026 149th duckyluuk 🇳🇱 858 143 582ms 27 Jul 2024 150th error256 857 328 1,592ms 9 Jun 2025 151st ovs-code 🇩🇪 856 178 447ms 18 May 2025 152nd rucin93 🇵🇱 855 144 140ms 23 Jan 2025 153rd primo-ppcg 🇹🇭 855 174 381ms 21 Nov 2021 153rd stefangimmillaro 855 174 412ms 9 Oct 2023 155th bricknellj 851 152 14ms 31 Jul 2024 156th typeswitch-dev 🇵🇹 849 246 3ms 27 Aug 2023 157th GrayJoKing 🇦🇺 846 153 15ms 10 Aug 2023 158th dokutan 844 222 2ms 8 Sep 2025 159th MeWhenI 🇻🇦 840 146 548ms 13 Jul 2024 160th albanian-laundromat 840 223 2ms 6 Nov 2025 First Prev 81–160 of 899 Next Last