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 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 1st MeWhenI 🇻🇦 1,000 60 43ms 25 Aug 2022 2nd JayXon 🇺🇸 981 95 10ms 13 Feb 2023 3rd primo-ppcg 🇹🇭 980 70 3ms 2 Nov 2018 4th nwellnhof 🇩🇪 972 75 155ms 14 Nov 2020 4th primo-ppcg 🇹🇭 972 75 180ms 4 Dec 2021 6th primo-ppcg 🇹🇭 971 83 35ms 9 Oct 2018 6th JayXon 🇺🇸 971 83 63ms 31 Jul 2025 6th pardouin 🇫🇷 971 83 66ms 31 Jul 2025 6th Steffan153 🇫🇮 971 83 67ms 49 mins ago 10th primo-ppcg 🇹🇭 968 62 41ms 10 Dec 2022 11th MeWhenI 🇻🇦 968 74 3ms 16 Jan 2022 12th JayXon 🇺🇸 965 113 10ms 19 Dec 2020 13th Steffan153 🇫🇮 961 97 10ms 12 Feb 2023 13th btnlq 961 97 11ms 13 Feb 2023 13th neel11235813 961 97 19ms 19 Feb 2023 13th sean-niemann 🇺🇸 961 97 11ms 24 Aug 2025 17th JayXon 🇺🇸 960 90 426ms 15 Feb 2024 18th sean-niemann 🇺🇸 956 114 11ms 18 Jan 2025 19th bitsandbeyond 🇳🇱 952 97 324ms 22 Feb 2026 20th JayXon 🇺🇸 952 112 453ms 7 Aug 2025 21st primo-ppcg 🇹🇭 951 98 10ms 5 Dec 2021 22nd primo-ppcg 🇹🇭 948 115 10ms 18 Dec 2020 22nd Steffan153 🇫🇮 948 115 11ms 14 Jan 2023 24th JayXon 🇺🇸 947 92 710ms 30 Dec 2023 25th pardouin 🇫🇷 942 99 11ms 12 Jul 2024 26th dmrichwa 🇺🇸 940 116 13ms 20 Jan 2024 27th Steffan153 🇫🇮 939 92 378ms 26 days ago 28th emgordon154 938 64 41ms 16 Nov 2025 29th sean-niemann 🇺🇸 937 86 68ms 12 Oct 2025 30th JayXon 🇺🇸 935 129 2ms 28 Aug 2021 31st JayXon 🇺🇸 934 121 4ms 3 Jul 2023 32nd JayXon 🇺🇸 927 102 125ms 17 Aug 2024 33rd JayXon 🇺🇸 926 110 1,610ms 31 Jul 2025 34th Steffan153 🇫🇮 925 104 914ms 15 Feb 2026 35th JayXon 🇺🇸 924 150 574ms 26 Sep 2025 36th GrayJoKing 🇦🇺 923 79 188ms 24 Aug 2020 36th SirBogman 🇺🇸 923 79 156ms 23 Jan 2024 38th JayXon 🇺🇸 920 112 3,244ms 18 May 2025 39th pardouin 🇫🇷 919 94 434ms 12 Jul 2024 40th ovs-code 🇩🇪 918 78 3ms 27 May 2024 41st sean-niemann 🇺🇸 918 103 160ms 6 Aug 2024 41st Steffan153 🇫🇮 918 103 145ms 6 Aug 2024 43rd ovs-code 🇩🇪 917 120 34ms 21 May 2024 44th canissimia 🇦🇶 915 123 3ms 11 Jul 2022 45th JayXon 🇺🇸 912 162 1ms 23 Jul 2021 46th JayXon 🇺🇸 912 177 334ms 23 Jul 2021 47th GrayJoKing 🇦🇺 911 116 3ms 19 Dec 2020 48th JayXon 🇺🇸 910 149 58ms 4 Mar 2024 49th lynn 909 121 33ms 24 Oct 2021 50th sean-niemann 🇺🇸 908 106 1,271ms 15 Sep 2025 51st emplv 🇱🇻 908 120 11ms 12 Oct 2020 51st Irratix 🇳🇱 908 120 10ms 9 Sep 2021 51st rucin93 🇵🇱 908 120 10ms 19 Jan 2025 54th saito-ta 🇯🇵 907 124 11ms 3 Jun 2022 55th kg583 🇺🇸 906 137 7ms 13 Dec 2025 55th Steffan153 🇫🇮 906 137 10ms 13 mins ago 57th hallvabo 🇳🇴 905 103 20ms 9 Apr 2022 57th FoxInTheClouds 905 103 10ms 2 Feb 2026 59th primo-ppcg 🇹🇭 905 125 4ms 3 Jul 2023 60th Yax42 🇫🇷 903 118 474ms 6 Aug 2025 61st pardouin 🇫🇷 902 113 1,562ms 31 Jul 2025 62nd JayXon 🇺🇸 900 137 129ms 30 Dec 2022 63rd primo-ppcg 🇹🇭 900 143 41ms 5 Dec 2021 64th kg583 🇺🇸 897 104 16ms 19 Jul 2024 64th duckyluuk 🇳🇱 897 104 17ms 29 Aug 2024 66th JayXon 🇺🇸 896 190 173ms 22 May 2025 67th JayXon 🇺🇸 896 200 152ms 9 Oct 2021 68th Steffan153 🇫🇮 895 126 93ms 30 Dec 2022 68th JayXon 🇺🇸 895 126 164ms 24 May 2025 70th kg583 🇺🇸 895 169 6ms 13 Dec 2025 71st Steffan153 🇫🇮 893 135 2ms 4 Mar 2024 72nd JayXon 🇺🇸 892 171 383ms 17 May 2022 73rd ovs-code 🇩🇪 892 201 148ms 30 Jan 2024 74th neel11235813 891 97 398ms 27 Mar 2024 75th JayXon 🇺🇸 891 147 462ms 6 Mar 2022 76th JayXon 🇺🇸 891 194 132ms 24 Feb 2023 76th MeWhenI 🇻🇦 891 194 136ms 22 Apr 2023 78th lifthrasiir 🇰🇷 888 105 10ms 4 Dec 2024 79th sean-niemann 🇺🇸 888 146 2ms 6 Jan 2026 80th KasperKivimaeki 🇫🇮 887 136 2ms 11 Nov 2025 1–80 of 1,003 Next Last
