The Gray Code Decoder and Gray Code Encoder holes will go live in approximately 4 days. Why not try and solve them ahead of time?
Gray Code 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 230th Natanaelel 🇸🇪 0 62 16ms 11 May 2025 230th hiichbindermax 0 62 18ms 17 Aug 2025 230th 5cw 🇺🇸 0 62 15ms 22 Aug 2025 230th commandz0 🇺🇸 0 62 15ms 27 Aug 2025 230th SirBogman 🇺🇸 0 62 15ms 12 Oct 2025 230th KasperKivimaeki 🇫🇮 0 62 15ms 20 Oct 2025 230th Matter1024 🇮🇳 0 62 15ms 12 Feb 2026 230th lukegustafson 🇺🇸 0 62 36ms 18 days ago 230th aksyristos 0 62 14ms 15 days ago 230th madex 🇩🇪 0 62 15ms 7 days ago 230th CaedenHarper 🇨🇦 0 62 16ms 6 days ago 230th KatieLG 🇬🇧 0 62 17ms 3 days ago 230th KatieLG 🇬🇧 0 62 416ms 3 days ago 230th scpchicken 🇵🇼 0 62 15ms 3 days ago 230th StefanHabel 🇨🇦 0 62 15ms 3 days ago 230th blaztoma 🇱🇹 0 62 15ms 3 days ago 230th Emutis 🇱🇹 0 62 16ms 3 days ago 230th Andrey2001 0 62 16ms 3 days ago 230th anter69 🇭🇺 0 62 15ms 3 days ago 230th qpwoeirut 0 62 17ms 2 days ago 230th stefangimmillaro 0 62 16ms 2 days ago 230th btjones0 0 62 15ms 2 days ago 230th bzijlema 🇳🇱 0 62 16ms 2 days ago 230th ahmetdemirag 🇨🇾 0 62 15ms 2 days ago 230th Pyroan 0 62 19ms 2 days ago 230th edsrzf 🇳🇿 0 62 15ms 47 hours ago 230th zacjl 0 62 17ms 40 hours ago 230th MeWhenI 🇻🇦 0 62 86ms 38 hours ago 230th ComradeSquirrel 0 62 14ms 37 hours ago 230th duckyluuk 🇳🇱 0 62 15ms 31 hours ago 230th Aquateraneal 🇺🇸 0 62 15ms 20 hours ago 230th madex 🇩🇪 0 62 439ms 12 hours ago 230th madex 🇩🇪 0 62 1,125ms 12 hours ago 230th luuumine 🇫🇷 0 62 19ms 6 hours ago 275th sean-niemann 🇺🇸 0 63 43ms 8 May 2025 275th albanian-laundromat 0 63 44ms 14 Jan 2026 275th tomh1012 0 63 15ms 3 days ago 275th mishak-sys 0 63 15ms 30 hours ago 279th jameswmccarty 0 64 15ms 29 Mar 2025 279th dokutan 0 64 63ms 8 Feb 2026 279th albanian-laundromat 0 64 188ms 5 days ago 279th zgialor-lab 0 64 16ms 2 days ago 283rd JDiLenarda 🇫🇷 0 65 1,347ms 2 days ago 284th Shanethegamer 🇺🇸 0 66 1,317ms 26 Nov 2024 284th rucin93 🇵🇱 0 66 6ms 8 May 2025 284th sean-niemann 🇺🇸 0 66 7ms 8 May 2025 284th AdrienHache 🇫🇷 0 66 421ms 2 Nov 2025 284th namelessiw 0 66 474ms 2 Nov 2025 284th GolfingSuccess 🇬🇷 0 66 430ms 4 Feb 2026 284th albanian-laundromat 0 66 1,345ms 5 days ago 284th Yax42 🇫🇷 0 66 461ms 4 days ago 284th fuzzylojik-golf 🇺🇸 0 66 456ms 3 days ago 284th edsrzf 🇳🇿 0 66 7ms 2 days ago 284th edsrzf 🇳🇿 0 66 1,345ms 46 hours ago 284th edsrzf 🇳🇿 0 66 451ms 34 hours ago 284th Steffan153 🇫🇮 0 66 480ms 28 hours ago 284th Steffan153 🇫🇮 0 66 7ms 23 hours ago 298th GolfingSuccess 🇬🇷 0 67 12ms 8 May 2025 298th tomh1012 0 67 429ms 3 days ago 298th msbranicky 0 67 16ms 8 hours ago 301st Shanethegamer 🇺🇸 0 68 145ms 26 Nov 2024 301st sean-niemann 🇺🇸 0 68 131ms 8 May 2025 301st edsrzf 🇳🇿 0 68 113ms 25 May 2025 301st GolfingSuccess 🇬🇷 0 68 110ms 4 days ago 301st fuzzylojik-golf 🇺🇸 0 68 1,320ms 2 days ago 301st Steffan153 🇫🇮 0 68 104ms 28 hours ago 307th GolfingSuccess 🇬🇷 0 69 10ms 8 May 2025 307th CaedenHarper 🇨🇦 0 69 486ms 4 days ago 307th MeWhenI 🇻🇦 0 69 454ms 9 hours ago 310th JOrE20 0 70 41ms 13 Feb 2026 311th kg583 🇺🇸 0 71 27ms 1 Dec 2024 311th CLOStrophobic 🇮🇹 0 71 13ms 18 Jan 2025 311th GolfingSuccess 🇬🇷 0 71 14ms 7 May 2025 311th edsrzf 🇳🇿 0 71 14ms 8 May 2025 311th AlephSquirrel 0 71 13ms 9 May 2025 316th Shanethegamer 🇺🇸 0 72 27ms 9 Dec 2024 317th GolfingSuccess 🇬🇷 0 73 16ms 8 May 2025 317th GolfingSuccess 🇬🇷 0 73 8ms 46 hours ago 319th not-a-pokemon 0 74 15ms 2 days ago 320th Shanethegamer 🇺🇸 0 75 107ms 26 Nov 2024 First Prev 241–320 of 481 Next Last