The Gray Code Decoder and Gray Code Encoder holes will go live in approximately 7 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 156th albanian-laundromat 0 75 108ms 5 Jan 2026 156th albanian-laundromat 0 75 455ms 6 Jan 2026 156th GolfingSuccess 🇬🇷 0 75 18ms 11 Jan 2026 156th albanian-laundromat 0 75 238ms 21 days ago 156th madex 🇩🇪 0 75 18ms 5 days ago 156th CaedenHarper 🇨🇦 0 75 149ms 3 days ago 156th fuzzylojik-golf 🇺🇸 0 75 123ms 20 hours ago 156th Yax42 🇫🇷 0 75 4ms 2 hours ago 169th Shanethegamer 🇺🇸 0 76 129ms 13 Dec 2024 169th edsrzf 🇳🇿 0 76 114ms 10 May 2025 169th ovs-code 🇩🇪 0 76 3ms 10 May 2025 169th AlephSquirrel 0 76 43ms 3 Dec 2025 169th AlephSquirrel 0 76 445ms 3 Dec 2025 169th albanian-laundromat 0 76 18ms 21 days ago 169th albanian-laundromat 0 76 188ms 15 days ago 169th MeWhenI 🇻🇦 0 76 586ms 8 days ago 177th CornerMercury 🇬🇧 0 77 18ms 3 Dec 2024 177th ndren 0 77 20ms 3 Dec 2024 177th lifthrasiir 🇰🇷 0 77 192ms 11 Dec 2024 177th Shanethegamer 🇺🇸 0 77 19ms 13 Dec 2024 177th DialFrost 🇸🇬 0 77 19ms 8 May 2025 177th emgordon154 0 77 38ms 9 May 2025 177th edsrzf 🇳🇿 0 77 1,938ms 9 May 2025 177th Natanaelel 🇸🇪 0 77 3ms 11 May 2025 177th addmai 0 77 20ms 24 Jul 2025 177th hiichbindermax 0 77 19ms 17 Aug 2025 177th 5cw 🇺🇸 0 77 18ms 22 Aug 2025 177th davecame 0 77 150ms 25 Sep 2025 177th SirBogman 🇺🇸 0 77 240ms 13 Oct 2025 177th jtaxen 0 77 19ms 16 Oct 2025 177th albanian-laundromat 0 77 19ms 25 Nov 2025 177th albanian-laundromat 0 77 412ms 6 Dec 2025 177th anter69 🇭🇺 0 77 139ms 4 Feb 2026 177th Matter1024 🇮🇳 0 77 17ms 12 Feb 2026 177th KasperKivimaeki 🇫🇮 0 77 564ms 8 days ago 177th StefanHabel 🇨🇦 0 77 1,207ms 14 hours ago 177th ahmetdemirag 🇨🇾 0 77 18ms 9 hours ago 177th tomh1012 0 77 17ms 7 hours ago 199th jameswmccarty 0 78 20ms 29 Mar 2025 199th DialFrost 🇸🇬 0 78 940ms 10 May 2025 199th DialFrost 🇸🇬 0 78 3ms 10 May 2025 199th solisolu 0 78 20ms 10 Nov 2025 203rd BREMAUCY 🇫🇷 0 79 18ms 11 hours ago 203rd Andrey2001 0 79 18ms 4 hours ago 205th Shanethegamer 🇺🇸 0 80 5ms 3 Jun 2025 205th error256 0 80 466ms 16 Jan 2026 205th madex 🇩🇪 0 80 378ms 13 hours ago 208th Shanethegamer 🇺🇸 0 81 348ms 3 Jun 2025 209th bricknellj 0 82 17ms 30 Jan 2025 209th dokutan 0 82 17ms 15 Aug 2025 209th scpchicken 🇵🇼 0 82 402ms 21 hours ago 209th KatieLG 🇬🇧 0 82 18ms 21 hours ago 209th madex 🇩🇪 0 82 4ms 13 hours ago 214th GolfingSuccess 🇬🇷 0 83 114ms 12 Jan 2026 214th GolfingSuccess 🇬🇷 0 83 386ms 12 Jan 2026 214th error256 0 83 430ms 12 Jan 2026 214th albanian-laundromat 0 83 9ms 26 Jan 2026 218th Shanethegamer 🇺🇸 0 85 6ms 13 Dec 2024 218th edsrzf 🇳🇿 0 85 1,065ms 25 May 2025 218th albanian-laundromat 0 85 92ms 6 Dec 2025 218th GolfingSuccess 🇬🇷 0 85 25ms 14 Jan 2026 222nd kg583 🇺🇸 0 86 23ms 2 Oct 2025 222nd GolfingSuccess 🇬🇷 0 86 2,109ms 15 days ago 224th sean-niemann 🇺🇸 0 87 42ms 9 May 2025 225th edsrzf 🇳🇿 0 88 2,094ms 15 May 2025 225th muser-logiccpu 🇺🇦 0 88 72ms 2 Sep 2025 225th solisolu 0 88 3ms 11 Nov 2025 225th albanian-laundromat 0 88 1,372ms 5 Jan 2026 225th error256 0 88 3,067ms 14 Jan 2026 225th IanUtley 0 88 2,941ms 16 Jan 2026 225th edsrzf 🇳🇿 0 88 26ms 49 mins ago 232nd Shanethegamer 🇺🇸 0 89 99ms 13 Dec 2024 232nd GolfingSuccess 🇬🇷 0 89 65ms 12 Jan 2026 234th sean-niemann 🇺🇸 0 90 7ms 10 May 2025 234th dokutan 0 90 65ms 8 Feb 2026 236th ovs-code 🇩🇪 0 91 261ms 13 Dec 2025 236th error256 0 91 57ms 12 Jan 2026 236th error256 0 91 293ms 14 Jan 2026 236th GolfingSuccess 🇬🇷 0 91 272ms 14 Jan 2026 236th Natanaelel 🇸🇪 0 91 340ms 5 hours ago First Prev 161–240 of 297 Next Last