The Gray Code Decoder and Gray Code Encoder holes will go live in approximately 3 days. Why not try and solve them ahead of time?
Forsyth–Edwards Notation in JavaScript 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 emplv 🇱🇻 1,000 101 9ms 2 May 2023 1st JayXon 🇺🇸 1,000 101 10ms 23 May 2023 1st Lydxn 🇨🇦 1,000 101 10ms 27 May 2023 1st vlpx 🇫🇮 1,000 101 9ms 19 Jun 2024 5th sean-niemann 🇺🇸 990 102 12ms 21 Feb 2025 5th rucin93 🇵🇱 990 102 10ms 31 May 2025 5th Steffan153 🇫🇮 990 102 10ms 27 days ago 8th kcinnu 🇱🇹 971 104 10ms 2 May 2023 8th dmrichwa 🇺🇸 971 104 9ms 19 May 2023 10th Shanethegamer 🇺🇸 927 109 9ms 4 May 2023 11th voytxt 🇨🇿 918 110 11ms 26 Nov 2025 12th tayloia 🇬🇧 910 111 12ms 2 May 2023 12th thisishowmymindworks 🇳🇴 910 111 11ms 6 Jun 2023 12th Andrey-Plotnikov 910 111 11ms 26 Sep 2025 12th Lv0Sys 🇵🇱 910 111 10ms 8 Dec 2025 16th Irratix 🇳🇱 902 112 10ms 27 May 2023 16th coreynash 902 112 9ms 12 Oct 2023 18th JOrE20 894 113 10ms 22 Feb 2026 19th MeWhenI 🇻🇦 878 115 10ms 26 Feb 2025 20th nwellnhof 🇩🇪 863 117 10ms 25 May 2023 20th quirked-up 863 117 10ms 31 Aug 2023 20th KrausRaus 🇺🇸 863 117 10ms 3 Nov 2023 23rd LukeBridges 🇬🇧 856 118 9ms 20 Sep 2024 23rd snoozingnewt 🇨🇦 856 118 10ms 31 Oct 2025 25th itsh01 849 119 9ms 1 May 2023 26th dylanarmstrong 828 122 9ms 23 Jan 2024 26th two-bad 🇬🇧 828 122 10ms 24 Feb 2024 26th Protothor 828 122 12ms 18 days ago 29th helbling 🇨🇭 802 126 10ms 24 Sep 2024 30th niklv 🇷🇺 795 127 10ms 14 May 2023 31st Salutations45 783 129 10ms 3 Dec 2024 31st targrik 783 129 12ms 9 Jun 2025 33rd uttumuttu 🇫🇮 777 130 9ms 22 Dec 2023 34th DialFrost 🇸🇬 765 132 9ms 11 Oct 2023 35th janbehrens 🇩🇪 759 133 11ms 17 Jun 2023 35th KingSkyrock 🇺🇸 759 133 12ms 15 Oct 2024 37th jared-hughes 748 135 9ms 28 Jul 2023 37th Argeento 🇵🇱 748 135 9ms 8 Sep 2023 37th itserasmus 748 135 9ms 17 Jan 2024 37th tomh1012 748 135 10ms 27 hours ago 37th Yax42 🇫🇷 748 135 10ms 23 hours ago 42nd madex 🇩🇪 743 136 9ms 24 Jul 2025 43rd olleicua 🇺🇸 737 137 10ms 3 Feb 2024 43rd CaedenHarper 🇨🇦 737 137 14ms 23 Aug 2025 45th zakariamouhid 716 141 10ms 11 May 2023 46th BambooleanLogic 🇸🇪 692 146 10ms 28 Jun 2023 47th emgordon154 682 148 12ms 13 Jun 2024 47th madeforlosers 682 148 9ms 3 Dec 2024 49th erikgaal 673 150 9ms 19 Jul 2023 49th robertvansteen 673 150 10ms 19 Jul 2023 51st ShiraJoseph 🇺🇸 669 151 10ms 21 Jul 2023 51st r-schmidtke 669 151 9ms 26 Apr 2024 53rd iczelia 🇩🇪 643 157 12ms 23 Oct 2025 54th Yewzir 🇧🇪 639 158 9ms 11 Feb 2024 54th alexsave 639 158 10ms 16 Jan 2026 56th didion0 🇺🇸 623 162 9ms 2 May 2023 56th eranws 623 162 10ms 23 Dec 2024 56th a6166231 🇨🇳 623 162 11ms 16 May 2025 59th KatieLG 🇬🇧 620 163 10ms 1 May 2023 60th weliveinhell 🇭🇹 580 174 11ms 25 Sep 2023 61st acollett89 574 176 9ms 8 Aug 2025 62nd adoxography 552 183 9ms 22 May 2023 63rd mrmena 🇦🇺 534 189 11ms 29 Mar 2024 64th logalex8369 🇺🇸 526 192 13ms 18 Dec 2025 65th daniel-cardone 523 193 9ms 8 Sep 2023 66th HenryTy83 476 212 10ms 3 May 2023 67th stephanie-flower 430 235 10ms 2 Nov 2025 68th apokryfos 419 241 9ms 20 Aug 2023 69th dokutan 406 249 10ms 29 Mar 2025 70th MyXoToD 🇩🇪 384 263 9ms 1 Jul 2024 71st Weston49 282 358 10ms 20 Oct 2023 72nd BKGSr2 99 1,024 9ms 25 Sep 2023 1–72 of 72
