The Gray Code Decoder and Gray Code Encoder holes will go live in approximately 6 days. Why not try and solve them ahead of time?
Morse Encoder 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 1st ovs-code 🇩🇪 1,000 80 3ms 12 Jul 2023 2nd primo-ppcg 🇹🇭 993 83 40ms 4 Dec 2022 3rd JayXon 🇺🇸 978 140 10ms 13 Feb 2023 4th lyphyser 973 94 53ms 4 Jan 2025 5th MeWhenI 🇻🇦 970 85 42ms 26 Jul 2022 6th JayXon 🇺🇸 968 115 35ms 31 Jul 2025 6th pardouin 🇫🇷 968 115 34ms 31 Jul 2025 6th Steffan153 🇫🇮 968 115 38ms 24 mins ago 9th JayXon 🇺🇸 967 141 11ms 19 Dec 2020 10th Steffan153 🇫🇮 961 142 11ms 24 Feb 2023 10th sean-niemann 🇺🇸 961 142 14ms 11 Jun 2023 12th bitsandbeyond 🇳🇱 959 119 291ms 10 Apr 2025 13th primo-ppcg 🇹🇭 958 113 3ms 4 Dec 2021 14th Steffan153 🇫🇮 958 143 10ms 19 mins ago 15th JayXon 🇺🇸 956 139 508ms 7 Aug 2025 16th JayXon 🇺🇸 954 129 628ms 15 Feb 2024 17th primo-ppcg 🇹🇭 952 121 117ms 4 Dec 2021 18th btnlq 951 144 10ms 13 Feb 2023 18th neel11235813 951 144 18ms 19 Feb 2023 18th sean-niemann 🇺🇸 951 144 12ms 24 Aug 2025 21st JayXon 🇺🇸 950 135 2ms 28 Aug 2021 22nd AlephSquirrel 947 87 43ms 28 Dec 2023 23rd JayXon 🇺🇸 944 127 641ms 12 Feb 2022 24th JayXon 🇺🇸 944 141 5ms 3 Jul 2023 25th AdrienHache 🇫🇷 943 97 52ms 28 Oct 2024 26th ovs-code 🇩🇪 943 122 34ms 21 May 2024 27th GrayJoKing 🇦🇺 941 118 3ms 19 Dec 2020 28th Steffan153 🇫🇮 941 120 938ms 15 Feb 2026 29th primo-ppcg 🇹🇭 941 145 9ms 5 Dec 2021 30th JayXon 🇺🇸 938 129 1,638ms 31 Jul 2025 31st primo-ppcg 🇹🇭 938 146 11ms 5 Dec 2021 32nd canissimia 🇦🇶 936 130 3ms 11 Jul 2022 33rd primo-ppcg 🇹🇭 935 119 36ms 5 Dec 2021 34th lynn 935 123 33ms 24 Oct 2021 35th JayXon 🇺🇸 933 169 644ms 26 Sep 2025 36th pardouin 🇫🇷 932 147 10ms 21 May 2024 37th JayXon 🇺🇸 928 164 1ms 23 Jul 2021 38th sean-niemann 🇺🇸 928 170 628ms 24 Sep 2025 39th JayXon 🇺🇸 927 155 58ms 4 Mar 2024 40th 5cw 🇺🇸 926 148 10ms 2 Nov 2025 41st neel11235813 925 133 531ms 27 Mar 2024 42nd JayXon 🇺🇸 925 183 334ms 23 Jul 2021 43rd primo-ppcg 🇹🇭 924 131 1,603ms 5 Dec 2021 43rd pardouin 🇫🇷 924 131 1,561ms 31 Jul 2025 45th JayXon 🇺🇸 924 143 3,220ms 18 May 2025 46th primo-ppcg 🇹🇭 924 144 5ms 5 Dec 2021 47th nwellnhof 🇩🇪 922 125 122ms 15 Oct 2020 48th JayXon 🇺🇸 922 143 154ms 17 Aug 2024 49th dmrichwa 🇺🇸 922 148 12ms 20 Jan 2024 50th JayXon 🇺🇸 921 132 164ms 24 May 2025 51st sean-niemann 🇺🇸 920 121 37ms 12 Oct 2025 52nd Steffan153 🇫🇮 919 134 504ms 3 Mar 2024 53rd ovs-code 🇩🇪 919 149 10ms 16 Feb 2025 54th sean-niemann 🇺🇸 918 123 1,125ms 15 Sep 2025 55th GrayJoKing 🇦🇺 915 126 134ms 28 Apr 2022 56th saito-ta 🇯🇵 915 133 8ms 3 Jun 2022 57th JayXon 🇺🇸 915 153 136ms 22 Oct 2022 57th Steffan153 🇫🇮 915 153 130ms 24 Feb 2023 59th primo-ppcg 🇹🇭 915 158 38ms 5 Dec 2021 59th saito-ta 🇯🇵 915 158 34ms 6 Jun 2022 61st ovs-code 🇩🇪 912 122 33ms 22 Feb 2025 62nd sean-niemann 🇺🇸 912 148 2ms 6 Jan 2026 63rd JayXon 🇺🇸 912 153 462ms 6 Mar 2022 64th rucin93 🇵🇱 912 173 411ms 24 Sep 2025 64th Steffan153 🇫🇮 912 173 465ms 11 Feb 2026 66th JayXon 🇺🇸 912 192 173ms 22 May 2025 67th sean-niemann 🇺🇸 911 146 5ms 24 Aug 2025 68th Steffan153 🇫🇮 910 141 2ms 4 Mar 2024 69th ovs-code 🇩🇪 910 146 4ms 22 Oct 2024 70th JayXon 🇺🇸 909 177 383ms 17 May 2022 71st edsrzf 🇳🇿 909 181 6ms 13 Dec 2025 72nd JayXon 🇺🇸 909 206 152ms 9 Oct 2021 73rd Seek64 🇩🇪 907 151 10ms 22 Sep 2024 74th emgordon154 906 91 41ms 16 Nov 2025 75th JayXon 🇺🇸 905 200 132ms 24 Feb 2023 76th ovs-code 🇩🇪 905 207 148ms 30 Jan 2024 77th edsrzf 🇳🇿 904 167 4ms 13 Jan 2026 78th kg583 🇺🇸 904 190 7ms 12 Feb 2026 79th KasperKivimaeki 🇫🇮 903 142 2ms 11 Nov 2025 80th Steffan153 🇫🇮 903 159 62ms 4 Mar 2024 1–80 of 1,009 Next Last