The Gray Code Decoder and Gray Code Encoder holes will go live in approximately 37 hours. 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 239th AlephSquirrel 0 76 43ms 3 Dec 2025 239th AlephSquirrel 0 76 445ms 3 Dec 2025 239th albanian-laundromat 0 76 18ms 27 days ago 239th albanian-laundromat 0 76 188ms 21 days ago 239th MeWhenI 🇻🇦 0 76 586ms 14 days ago 239th MeWhenI 🇻🇦 0 76 184ms 4 days ago 239th duckyluuk 🇳🇱 0 76 128ms 3 days ago 248th lifthrasiir 🇰🇷 0 77 192ms 11 Dec 2024 248th Shanethegamer 🇺🇸 0 77 19ms 13 Dec 2024 248th emgordon154 0 77 161ms 9 May 2025 248th Natanaelel 🇸🇪 0 77 3ms 11 May 2025 248th addmai 0 77 20ms 24 Jul 2025 248th hiichbindermax 0 77 17ms 17 Aug 2025 248th 5cw 🇺🇸 0 77 18ms 22 Aug 2025 248th davecame 0 77 135ms 25 Sep 2025 248th SirBogman 🇺🇸 0 77 232ms 13 Oct 2025 248th jtaxen 0 77 19ms 16 Oct 2025 248th albanian-laundromat 0 77 19ms 25 Nov 2025 248th albanian-laundromat 0 77 412ms 6 Dec 2025 248th anter69 🇭🇺 0 77 139ms 4 Feb 2026 248th Matter1024 🇮🇳 0 77 17ms 12 Feb 2026 248th KasperKivimaeki 🇫🇮 0 77 564ms 14 days ago 248th StefanHabel 🇨🇦 0 77 1,217ms 6 days ago 248th ahmetdemirag 🇨🇾 0 77 18ms 5 days ago 248th tomh1012 0 77 17ms 5 days ago 248th HumanoidCPU 0 77 230ms 5 days ago 248th qpwoeirut 0 77 20ms 5 days ago 248th btjones0 0 77 19ms 5 days ago 248th ComradeSquirrel 0 77 18ms 5 days ago 248th bzijlema 🇳🇱 0 77 18ms 5 days ago 248th Lv0Sys 🇵🇱 0 77 18ms 3 days ago 248th stefangimmillaro 0 77 136ms 30 hours ago 248th LostSyntax21 🇬🇧 0 77 18ms 21 hours ago 274th jameswmccarty 0 78 19ms 29 Mar 2025 274th DialFrost 🇸🇬 0 78 3ms 10 May 2025 274th solisolu 0 78 20ms 10 Nov 2025 274th madex 🇩🇪 0 78 3ms 3 days ago 274th madex 🇩🇪 0 78 91ms 39 hours ago 274th Steffan153 🇫🇮 0 78 454ms 5 hours ago 274th acollett89 0 78 12ms a min ago 281st BREMAUCY 🇫🇷 0 79 18ms 6 days ago 281st Andrey2001 0 79 18ms 5 days ago 281st edsrzf 🇳🇿 0 79 30ms 5 days ago 281st mishak-sys 0 79 411ms 3 days ago 281st madex 🇩🇪 0 79 29ms 39 hours ago 286th Shanethegamer 🇺🇸 0 80 5ms 3 Jun 2025 286th error256 0 80 466ms 16 Jan 2026 286th albanian-laundromat 0 80 29ms 5 days ago 289th Shanethegamer 🇺🇸 0 81 348ms 3 Jun 2025 289th Lv0Sys 🇵🇱 0 81 437ms 3 days ago 289th Aquateraneal 🇺🇸 0 81 19ms 3 days ago 289th luuumine 🇫🇷 0 81 16ms 2 days ago 289th KatieLG 🇬🇧 0 81 67ms 21 hours ago 294th bricknellj 0 82 17ms 30 Jan 2025 294th dokutan 0 82 17ms 15 Aug 2025 294th scpchicken 🇵🇼 0 82 402ms 6 days ago 294th KatieLG 🇬🇧 0 82 18ms 6 days ago 294th MeWhenI 🇻🇦 0 82 105ms 4 days ago 294th solisolu 0 82 4ms 3 days ago 294th MeWhenI 🇻🇦 0 82 391ms 2 days ago 301st GolfingSuccess 🇬🇷 0 83 114ms 12 Jan 2026 301st GolfingSuccess 🇬🇷 0 83 386ms 12 Jan 2026 301st error256 0 83 430ms 12 Jan 2026 301st albanian-laundromat 0 83 9ms 26 Jan 2026 301st edsrzf 🇳🇿 0 83 473ms 5 days ago 301st edsrzf 🇳🇿 0 83 1,251ms 5 days ago 301st edsrzf 🇳🇿 0 83 106ms 4 days ago 301st Steffan153 🇫🇮 0 83 416ms 3 days ago 301st msbranicky 0 83 18ms 2 days ago 310th madex 🇩🇪 0 84 373ms 36 hours ago 311th Shanethegamer 🇺🇸 0 85 6ms 13 Dec 2024 311th edsrzf 🇳🇿 0 85 1,065ms 25 May 2025 311th albanian-laundromat 0 85 98ms 6 Dec 2025 311th GolfingSuccess 🇬🇷 0 85 25ms 14 Jan 2026 311th edsrzf 🇳🇿 0 85 28ms 5 days ago 316th kg583 🇺🇸 0 86 23ms 2 Oct 2025 316th GolfingSuccess 🇬🇷 0 86 2,109ms 21 days ago 318th sean-niemann 🇺🇸 0 87 42ms 9 May 2025 318th CaedenHarper 🇨🇦 0 87 439ms 5 days ago 318th madex 🇩🇪 0 87 13ms 3 days ago First Prev 241–320 of 419 Next Last