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 Decoder 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 230th albanian-laundromat 0 77 19ms 25 Nov 2025 230th albanian-laundromat 0 77 412ms 6 Dec 2025 230th anter69 🇭🇺 0 77 139ms 4 Feb 2026 230th Matter1024 🇮🇳 0 77 17ms 12 Feb 2026 230th KasperKivimaeki 🇫🇮 0 77 564ms 11 days ago 230th StefanHabel 🇨🇦 0 77 1,217ms 3 days ago 230th ahmetdemirag 🇨🇾 0 77 18ms 3 days ago 230th tomh1012 0 77 17ms 3 days ago 230th HumanoidCPU 0 77 230ms 2 days ago 230th qpwoeirut 0 77 20ms 2 days ago 230th btjones0 0 77 19ms 2 days ago 230th ComradeSquirrel 0 77 18ms 2 days ago 230th bzijlema 🇳🇱 0 77 18ms 2 days ago 230th Lv0Sys 🇵🇱 0 77 18ms 31 hours ago 255th jameswmccarty 0 78 20ms 29 Mar 2025 255th DialFrost 🇸🇬 0 78 3ms 10 May 2025 255th solisolu 0 78 20ms 10 Nov 2025 255th madex 🇩🇪 0 78 3ms 11 hours ago 259th BREMAUCY 🇫🇷 0 79 18ms 3 days ago 259th Andrey2001 0 79 18ms 3 days ago 259th edsrzf 🇳🇿 0 79 30ms 2 days ago 259th mishak-sys 0 79 411ms 28 hours ago 263rd Shanethegamer 🇺🇸 0 80 5ms 3 Jun 2025 263rd error256 0 80 466ms 16 Jan 2026 263rd stefangimmillaro 0 80 19ms 2 days ago 263rd albanian-laundromat 0 80 29ms 2 days ago 267th Shanethegamer 🇺🇸 0 81 348ms 3 Jun 2025 267th Lv0Sys 🇵🇱 0 81 437ms 28 hours ago 267th Aquateraneal 🇺🇸 0 81 19ms 19 hours ago 267th luuumine 🇫🇷 0 81 16ms 4 hours ago 267th acollett89 0 81 14ms 2 hours ago 272nd bricknellj 0 82 17ms 30 Jan 2025 272nd dokutan 0 82 17ms 15 Aug 2025 272nd scpchicken 🇵🇼 0 82 402ms 3 days ago 272nd KatieLG 🇬🇧 0 82 18ms 3 days ago 272nd MeWhenI 🇻🇦 0 82 105ms 43 hours ago 272nd solisolu 0 82 4ms 30 hours ago 278th GolfingSuccess 🇬🇷 0 83 114ms 12 Jan 2026 278th GolfingSuccess 🇬🇷 0 83 386ms 12 Jan 2026 278th error256 0 83 430ms 12 Jan 2026 278th albanian-laundromat 0 83 9ms 26 Jan 2026 278th edsrzf 🇳🇿 0 83 473ms 2 days ago 278th edsrzf 🇳🇿 0 83 1,251ms 2 days ago 278th edsrzf 🇳🇿 0 83 106ms 32 hours ago 278th Steffan153 🇫🇮 0 83 416ms 27 hours ago 278th msbranicky 0 83 18ms 84 mins ago 287th Shanethegamer 🇺🇸 0 85 6ms 13 Dec 2024 287th edsrzf 🇳🇿 0 85 1,065ms 25 May 2025 287th albanian-laundromat 0 85 98ms 6 Dec 2025 287th GolfingSuccess 🇬🇷 0 85 25ms 14 Jan 2026 287th edsrzf 🇳🇿 0 85 28ms 2 days ago 292nd kg583 🇺🇸 0 86 23ms 2 Oct 2025 292nd GolfingSuccess 🇬🇷 0 86 2,109ms 18 days ago 294th sean-niemann 🇺🇸 0 87 42ms 9 May 2025 294th CaedenHarper 🇨🇦 0 87 439ms 2 days ago 294th madex 🇩🇪 0 87 13ms 11 hours ago 297th muser-logiccpu 🇺🇦 0 88 72ms 2 Sep 2025 297th albanian-laundromat 0 88 1,372ms 5 Jan 2026 297th error256 0 88 3,067ms 14 Jan 2026 297th IanUtley 0 88 2,941ms 16 Jan 2026 301st Shanethegamer 🇺🇸 0 89 107ms 13 Dec 2024 301st GolfingSuccess 🇬🇷 0 89 64ms 12 Jan 2026 303rd sean-niemann 🇺🇸 0 90 7ms 10 May 2025 303rd dokutan 0 90 65ms 8 Feb 2026 305th ovs-code 🇩🇪 0 91 261ms 13 Dec 2025 305th error256 0 91 62ms 12 Jan 2026 305th error256 0 91 293ms 14 Jan 2026 305th GolfingSuccess 🇬🇷 0 91 272ms 14 Jan 2026 305th Natanaelel 🇸🇪 0 91 333ms 3 days ago 305th Steffan153 🇫🇮 0 91 59ms 27 hours ago 311th Shanethegamer 🇺🇸 0 92 462ms 20 May 2025 311th Yax42 🇫🇷 0 92 68ms 3 days ago 311th edsrzf 🇳🇿 0 92 18ms 35 hours ago 314th Yax42 🇫🇷 0 93 392ms 3 days ago 315th Shanethegamer 🇺🇸 0 94 383ms 13 Dec 2024 315th edsrzf 🇳🇿 0 94 459ms 20 May 2025 315th MeWhenI 🇻🇦 0 94 396ms 46 hours ago 315th edsrzf 🇳🇿 0 94 6ms 40 hours ago 315th albanian-laundromat 0 94 6ms 40 hours ago 320th albanian-laundromat 0 95 114ms 6 Jan 2026 First Prev 241–320 of 382 Next Last