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 401st sean-niemann 🇺🇸 0 102 286ms 8 May 2025 401st Shanethegamer 🇺🇸 0 102 307ms 8 May 2025 401st edsrzf 🇳🇿 0 102 295ms 9 May 2025 401st GolfingSuccess 🇬🇷 0 102 306ms 9 May 2025 401st ovs-code 🇩🇪 0 102 311ms 13 Dec 2025 401st kg583 🇺🇸 0 102 13ms 25 Jan 2026 401st CaedenHarper 🇨🇦 0 102 301ms 5 days ago 401st fuzzylojik-golf 🇺🇸 0 102 292ms 3 days ago 401st emgordon154 0 102 274ms 43 hours ago 401st edsrzf 🇳🇿 0 102 341ms 16 hours ago 401st Steffan153 🇫🇮 0 102 338ms 9 hours ago 401st Steffan153 🇫🇮 0 102 284ms 5 hours ago 413th lukechampine 0 103 301ms 7 Jun 2025 413th chris124567 0 103 294ms 8 Jun 2025 413th albanian-laundromat 0 103 270ms 16 Dec 2025 413th GolfingSuccess 🇬🇷 0 103 336ms 14 Jan 2026 413th HumanoidCPU 0 103 329ms 24 hours ago 418th UnderKoen 🇳🇱 0 107 2,121ms 36 hours ago 419th HumanoidCPU 0 108 13ms 55 mins ago 420th edsrzf 🇳🇿 0 109 21ms 18 hours ago 420th emgordon154 0 109 84ms 5 hours ago 422nd Steffan153 🇫🇮 0 110 28ms 7 hours ago 422nd edsrzf 🇳🇿 0 110 32ms 7 hours ago 424th GolfingSuccess 🇬🇷 0 111 107ms 23 hours ago 425th retrohun 0 112 16ms 2 days ago 425th edsrzf 🇳🇿 0 112 27ms 20 hours ago 427th prestosilver 🇺🇸 0 115 418ms 2 days ago 427th HumanoidCPU 0 115 260ms 24 hours ago 429th GolfingSuccess 🇬🇷 0 117 34ms 25 Dec 2025 430th not-a-pokemon 0 119 15ms 34 hours ago 431st edsrzf 🇳🇿 0 127 58ms 39 hours ago 431st Steffan153 🇫🇮 0 127 57ms 5 hours ago 433rd saito-ta 🇯🇵 0 128 1,990ms 8 May 2025 434th CaedenHarper 🇨🇦 0 129 446ms 5 days ago 435th Natanaelel 🇸🇪 0 130 360ms 2 May 2025 436th edsrzf 🇳🇿 0 134 22ms 23 hours ago 437th Shanethegamer 🇺🇸 0 136 315ms 26 Nov 2024 438th albanian-laundromat 0 137 27ms 4 days ago 439th GolfingSuccess 🇬🇷 0 138 336ms 8 May 2025 440th GolfingSuccess 🇬🇷 0 140 94ms 28 hours ago 441st canissimia 🇦🇶 0 143 15ms 43 hours ago 442nd emgordon154 0 150 15ms 9 May 2025 442nd albanian-laundromat 0 150 28ms 4 days ago 444th kasarino 0 157 12ms 32 hours ago 445th JOrE20 0 159 69ms 14 Feb 2026 446th emgordon154 0 162 1,822ms 21 hours ago 447th RYSF13 🇨🇳 0 168 13ms 25 Jun 2025 448th Shanethegamer 🇺🇸 0 197 1,442ms 1 Feb 2025 449th emgordon154 0 199 1,419ms 27 hours ago 450th voytxt 🇨🇿 0 200 1,425ms 6 Feb 2026 450th GolfingSuccess 🇬🇷 0 200 1,407ms 46 hours ago 450th HumanoidCPU 0 200 408ms 60 mins ago 453rd albanian-laundromat 0 235 112ms 24 hours ago 454th ovs-code 🇩🇪 0 237 107ms 27 hours ago 455th albanian-laundromat 0 243 15ms 5 days ago 456th JOrE20 0 381 2,653ms 29 Dec 2025 457th CaedenHarper 🇨🇦 0 853 550ms 4 days ago First Prev 401–457 of 457