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 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 emplv 🇱🇻 1,000 117 10ms 12 May 2023 1st JayXon 🇺🇸 1,000 117 11ms 23 May 2023 1st nwellnhof 🇩🇪 1,000 117 10ms 25 May 2023 1st Lydxn 🇨🇦 1,000 117 10ms 27 May 2023 1st Steffan153 🇫🇮 1,000 117 11ms 27 May 2024 1st vlpx 🇫🇮 1,000 117 11ms 18 Jun 2024 1st sean-niemann 🇺🇸 1,000 117 13ms 21 Feb 2025 1st rucin93 🇵🇱 1,000 117 12ms 21 Apr 2025 9th kcinnu 🇱🇹 959 122 9ms 2 May 2023 10th MeWhenI 🇻🇦 936 125 11ms 26 Feb 2025 11th dmrichwa 🇺🇸 921 127 9ms 28 May 2023 12th coreynash 907 129 9ms 12 Oct 2023 12th targrik 907 129 12ms 9 Jun 2025 14th uttumuttu 🇫🇮 900 130 9ms 22 Dec 2023 15th Shanethegamer 🇺🇸 886 132 10ms 4 May 2023 16th janbehrens 🇩🇪 880 133 11ms 17 Jun 2023 17th voytxt 🇨🇿 873 134 15ms 26 Nov 2025 18th tayloia 🇬🇧 867 135 10ms 2 May 2023 18th thisishowmymindworks 🇳🇴 867 135 10ms 6 Jun 2023 18th jared-hughes 867 135 9ms 28 Jul 2023 18th Argeento 🇵🇱 867 135 9ms 8 Sep 2023 18th Andrey-Plotnikov 867 135 11ms 26 Sep 2025 18th Lv0Sys 🇵🇱 867 135 10ms 8 Dec 2025 24th DialFrost 🇸🇬 860 136 10ms 14 Jan 2024 25th CaedenHarper 🇨🇦 854 137 14ms 23 Aug 2025 26th Irratix 🇳🇱 848 138 9ms 27 May 2023 27th JOrE20 842 139 11ms 22 Feb 2026 28th quirked-up 830 141 10ms 31 Aug 2023 28th KrausRaus 🇺🇸 830 141 10ms 3 Nov 2023 30th LukeBridges 🇬🇧 824 142 9ms 20 Sep 2024 31st itsh01 818 143 9ms 1 May 2023 32nd dylanarmstrong 801 146 9ms 23 Jan 2024 32nd two-bad 🇬🇧 801 146 10ms 24 Feb 2024 32nd Protothor 801 146 12ms 17 days ago 35th snoozingnewt 🇨🇦 791 148 11ms 31 Oct 2025 36th erikgaal 780 150 9ms 19 Jul 2023 36th robertvansteen 780 150 10ms 19 Jul 2023 38th BambooleanLogic 🇸🇪 770 152 9ms 28 Jun 2023 39th Salutations45 765 153 10ms 3 Dec 2024 39th Yax42 🇫🇷 765 153 9ms 9 hours ago 41st madeforlosers 755 155 10ms 8 May 2025 42nd KingSkyrock 🇺🇸 745 157 12ms 15 Oct 2024 42nd iczelia 🇩🇪 745 157 12ms 23 Oct 2025 44th alexsave 741 158 10ms 16 Jan 2026 45th itserasmus 736 159 9ms 17 Jan 2024 45th tomh1012 736 159 10ms 14 hours ago 47th madex 🇩🇪 731 160 9ms 24 Jul 2025 48th olleicua 🇺🇸 727 161 10ms 3 Feb 2024 49th helbling 🇨🇭 722 162 10ms 24 Sep 2024 49th a6166231 🇨🇳 722 162 11ms 16 May 2025 51st zakariamouhid 709 165 10ms 11 May 2023 52nd niklv 🇷🇺 696 168 13ms 14 May 2023 53rd emgordon154 680 172 12ms 13 Jun 2024 54th ShiraJoseph 🇺🇸 669 175 10ms 21 Jul 2023 54th r-schmidtke 669 175 9ms 26 Apr 2024 56th Yewzir 🇧🇪 643 182 9ms 11 Feb 2024 57th adoxography 639 183 9ms 22 May 2023 58th didion0 🇺🇸 629 186 9ms 2 May 2023 58th eranws 629 186 10ms 23 Dec 2024 60th KatieLG 🇬🇧 626 187 10ms 1 May 2023 61st weliveinhell 🇭🇹 591 198 11ms 25 Sep 2023 62nd acollett89 585 200 9ms 8 Aug 2025 63rd mrmena 🇦🇺 549 213 11ms 29 Mar 2024 64th logalex8369 🇺🇸 542 216 13ms 18 Dec 2025 65th daniel-cardone 539 217 9ms 8 Sep 2023 66th HenryTy83 496 236 10ms 3 May 2023 67th stephanie-flower 452 259 10ms 2 Nov 2025 68th apokryfos 442 265 9ms 20 Aug 2023 69th dokutan 429 273 10ms 29 Mar 2025 70th MyXoToD 🇩🇪 408 287 9ms 1 Jul 2024 71st Weston49 306 382 10ms 20 Oct 2023 72nd BKGSr2 114 1,024 9ms 25 Sep 2023 1–72 of 72
