Gray Code Decoder in all languages in chars. Cheevos Holes Recent Holes Langs Medals Misc 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 Card Number Validation Catalan Numbers Catalan’s Constant Christmas Trees Collatz 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 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 Transpose Sentence Trinomial Triangle United States Vampire Numbers Van Eck Sequence Zeckendorf Representation Zodiac Signs γ λ π τ φ √2 𝑒 Apéry’s Constant Binary Lambda Calculus Calendar Connect Four Continued Fractions 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 Odd Polyomino Tiling p-adic Expansion Polygon Triangulations QR Encoder Quadratic Formula Semiprime Numbers Smooth Numbers Snake Sphenic Numbers Tower of Hanoi Turtle Tutorial All Languages ><> Assembly AWK Bash BASIC Berry brainfuck C C# C++ Civet Clojure COBOL Coconut Common Lisp Crystal D Dart Elixir 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 ALGOL 68 APL Arturo Befunge BQN CJam CoffeeScript Egel Erlang Fennel Harbour Hare Haxe Hush Hy iogii Knight Luau Odin Picat Qore Racket Rebol Rexx Scala Squirrel Stax Uiua Umka Vala Vyxal Bytes Chars Scoring Bytes Chars Language All ><> Assembly AWK Bash BASIC Berry brainfuck C C# C++ Civet Clojure COBOL Coconut Common Lisp Crystal D Dart Elixir 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 ALGOL 68 APL Arturo Befunge BQN CJam CoffeeScript Egel Erlang Fennel Harbour Hare Haxe Hush Hy iogii Knight 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 Card Number Validation Catalan Numbers Catalan’s Constant Christmas Trees Collatz 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 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 Transpose Sentence Trinomial Triangle United States Vampire Numbers Van Eck Sequence Zeckendorf Representation Zodiac Signs γ λ π τ φ √2 𝑒 Experimental Hole Apéry’s Constant Binary Lambda Calculus Calendar Connect Four Continued Fractions 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 Odd Polyomino Tiling p-adic Expansion Polygon Triangulations QR Encoder Quadratic Formula Semiprime Numbers Smooth Numbers Snake Sphenic Numbers Tower of Hanoi Turtle Tutorial # Golfer Points Chars Time Submitted 1st 2bular 0 7 302ms 5 Jul 2025 1st Natanaelel 🇸🇪 0 7 315ms 5 Jul 2025 3rd kg583 🇺🇸 0 9 920ms 14 May 2025 4th 2bular 0 13 4ms 9 Dec 2024 4th ovs-code 🇩🇪 0 13 4ms 5 Jan 2025 4th Natanaelel 🇸🇪 0 13 4ms 8 May 2025 4th SirBogman 🇺🇸 0 13 4ms 12 Oct 2025 4th namelessiw 0 13 367ms 25 Oct 2025 9th saito-ta 🇯🇵 0 18 75ms 11 May 2025 10th pardouin 🇫🇷 0 20 72ms 25 Feb 2025 11th ovs-code 🇩🇪 0 22 9ms 23 Feb 2025 12th emgordon154 0 26 315ms 45 hours ago 13th 2bular 0 28 45ms 9 Oct 2025 13th SirBogman 🇺🇸 0 28 40ms 9 Oct 2025 15th GolfingSuccess 🇬🇷 0 29 97ms 25 Nov 2024 15th Natanaelel 🇸🇪 0 29 44ms 11 May 2025 15th ovs-code 🇩🇪 0 29 45ms 9 Oct 2025 18th ovs-code 🇩🇪 0 31 143ms 30 May 2025 19th Shanethegamer 🇺🇸 0 32 35ms 19 May 2025 20th Natanaelel 🇸🇪 0 33 134ms 8 May 2025 21st 4atj 0 35 282ms 21 May 2025 22nd 4atj 0 36 251ms 21 May 2025 23rd saito-ta 🇯🇵 0 37 9ms 11 May 2025 23rd Natanaelel 🇸🇪 0 37 10ms 11 May 2025 25th Natanaelel 🇸🇪 0 38 39ms 8 May 2025 26th error256 0 39 91ms 8 May 2025 27th stefangimmillaro 0 41 77ms 9 May 2025 28th Shanethegamer 🇺🇸 0 42 46ms 13 Dec 2024 28th MeWhenI 🇻🇦 0 42 1,012ms 15 Apr 2025 28th saito-ta 🇯🇵 0 42 360ms 10 May 2025 31st error256 0 45 993ms 12 Apr 2025 32nd kg583 🇺🇸 0 46 928ms 3 Oct 2025 32nd bitsandbeyond 🇳🇱 0 46 1,114ms 20 Oct 2025 34th ovs-code 🇩🇪 0 48 326ms 23 Feb 2025 35th antimon2 🇯🇵 0 49 328ms 16 Dec 2024 35th DialFrost 🇸🇬 0 49 54ms 9 May 2025 35th kg583 🇺🇸 0 49 14ms 3 Oct 2025 38th Shanethegamer 🇺🇸 0 50 3,285ms 8 May 2025 39th lukegustafson 🇺🇸 0 51 47ms 16 Jun 2025 40th Shanethegamer 🇺🇸 0 52 958ms 13 Dec 2024 40th error256 0 52 3,759ms 26 Sep 2025 42nd kg583 🇺🇸 0 53 12ms 2 Oct 2025 43rd Shanethegamer 🇺🇸 0 54 39ms 13 Dec 2024 43rd rucin93 🇵🇱 0 54 40ms 24 Feb 2025 43rd error256 0 54 28ms 2 May 2025 43rd sean-niemann 🇺🇸 0 54 39ms 8 May 2025 47th Natanaelel 🇸🇪 0 55 11ms 8 May 2025 48th kg583 🇺🇸 0 56 449ms 1 Dec 2024 48th kg583 🇺🇸 0 56 2,240ms 3 Oct 2025 50th edsrzf 🇳🇿 0 57 11ms 10 May 2025 51st pardouin 🇫🇷 0 58 624ms 24 Feb 2025 51st kg583 🇺🇸 0 58 8ms 2 Oct 2025 53rd lifthrasiir 🇰🇷 0 59 506ms 11 Dec 2024 53rd ovs-code 🇩🇪 0 59 418ms 23 Feb 2025 53rd sean-niemann 🇺🇸 0 59 414ms 19 May 2025 56th khvdm 0 60 155ms 13 Jan 2025 56th emgordon154 0 60 285ms 9 May 2025 56th emgordon154 0 60 437ms 9 May 2025 59th DialFrost 🇸🇬 0 61 31ms 24 Feb 2025 60th Andrey-Plotnikov 0 62 35ms 12 Jan 2025 60th XenThe 🇬🇧 0 62 11ms 15 Jul 2025 62nd kg583 🇺🇸 0 63 912ms 1 Dec 2024 62nd hallvabo 🇳🇴 0 63 145ms 30 Dec 2024 62nd pardouin 🇫🇷 0 63 229ms 24 Feb 2025 62nd Shanethegamer 🇺🇸 0 63 168ms 7 May 2025 62nd sean-niemann 🇺🇸 0 63 6ms 9 May 2025 62nd rucin93 🇵🇱 0 63 6ms 10 May 2025 62nd edsrzf 🇳🇿 0 63 5ms 10 May 2025 62nd targrik 0 63 6ms 8 Oct 2025 70th CornerMercury 🇬🇧 0 64 19ms 3 Dec 2024 70th ndren 0 64 18ms 3 Dec 2024 70th lifthrasiir 🇰🇷 0 64 189ms 11 Dec 2024 70th emgordon154 0 64 20ms 9 May 2025 74th Shanethegamer 🇺🇸 0 65 261ms 13 Dec 2024 75th dokutan 0 66 460ms 18 Aug 2025 1–75 of 173 Next Last