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 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 400th ovs-code 🇩🇪 0 100 160ms 13 hours ago 402nd HumanoidCPU 0 101 361ms 31 hours ago 402nd HumanoidCPU 0 101 382ms 29 hours ago 404th sean-niemann 🇺🇸 0 102 286ms 8 May 2025 404th Shanethegamer 🇺🇸 0 102 307ms 8 May 2025 404th edsrzf 🇳🇿 0 102 295ms 9 May 2025 404th GolfingSuccess 🇬🇷 0 102 306ms 9 May 2025 404th ovs-code 🇩🇪 0 102 311ms 13 Dec 2025 404th CaedenHarper 🇨🇦 0 102 301ms 5 days ago 404th fuzzylojik-golf 🇺🇸 0 102 292ms 3 days ago 404th emgordon154 0 102 274ms 47 hours ago 404th edsrzf 🇳🇿 0 102 341ms 20 hours ago 404th Steffan153 🇫🇮 0 102 338ms 13 hours ago 404th Steffan153 🇫🇮 0 102 284ms 9 hours ago 415th lukechampine 0 103 301ms 7 Jun 2025 415th chris124567 0 103 294ms 8 Jun 2025 415th albanian-laundromat 0 103 270ms 16 Dec 2025 415th GolfingSuccess 🇬🇷 0 103 336ms 14 Jan 2026 415th HumanoidCPU 0 103 329ms 29 hours ago 420th UnderKoen 🇳🇱 0 107 2,121ms 41 hours ago 421st HumanoidCPU 0 108 13ms 5 hours ago 422nd edsrzf 🇳🇿 0 109 21ms 23 hours ago 422nd emgordon154 0 109 84ms 9 hours ago 424th kg583 🇺🇸 0 110 14ms 12 Jan 2026 424th Steffan153 🇫🇮 0 110 28ms 12 hours ago 424th edsrzf 🇳🇿 0 110 32ms 11 hours ago 427th GolfingSuccess 🇬🇷 0 111 107ms 27 hours ago 428th retrohun 0 112 16ms 2 days ago 428th edsrzf 🇳🇿 0 112 27ms 25 hours ago 430th prestosilver 🇺🇸 0 115 418ms 2 days ago 430th HumanoidCPU 0 115 260ms 28 hours ago 432nd GolfingSuccess 🇬🇷 0 117 34ms 25 Dec 2025 433rd not-a-pokemon 0 119 15ms 38 hours ago 434th edsrzf 🇳🇿 0 127 58ms 43 hours ago 434th Steffan153 🇫🇮 0 127 57ms 9 hours ago 436th saito-ta 🇯🇵 0 128 1,990ms 8 May 2025 437th CaedenHarper 🇨🇦 0 129 446ms 5 days ago 438th Natanaelel 🇸🇪 0 130 360ms 2 May 2025 439th edsrzf 🇳🇿 0 134 22ms 28 hours ago 440th Shanethegamer 🇺🇸 0 136 315ms 26 Nov 2024 441st albanian-laundromat 0 137 27ms 5 days ago 442nd GolfingSuccess 🇬🇷 0 138 336ms 8 May 2025 443rd GolfingSuccess 🇬🇷 0 140 94ms 32 hours ago 444th canissimia 🇦🇶 0 143 15ms 47 hours ago 445th emgordon154 0 150 15ms 9 May 2025 445th albanian-laundromat 0 150 28ms 5 days ago 447th kasarino 0 157 12ms 36 hours ago 448th JOrE20 0 159 69ms 14 Feb 2026 449th emgordon154 0 162 1,822ms 25 hours ago 450th RYSF13 🇨🇳 0 168 13ms 25 Jun 2025 451st Shanethegamer 🇺🇸 0 197 1,442ms 1 Feb 2025 452nd emgordon154 0 199 1,419ms 31 hours ago 453rd voytxt 🇨🇿 0 200 1,425ms 6 Feb 2026 453rd GolfingSuccess 🇬🇷 0 200 1,407ms 2 days ago 453rd HumanoidCPU 0 200 408ms 5 hours ago 456th albanian-laundromat 0 235 112ms 29 hours ago 457th ovs-code 🇩🇪 0 237 107ms 31 hours ago 458th albanian-laundromat 0 243 15ms 5 days ago 459th JOrE20 0 381 2,653ms 29 Dec 2025 460th CaedenHarper 🇨🇦 0 853 550ms 4 days ago First Prev 401–460 of 460
