The Gray Code Decoder and Gray Code Encoder holes will go live in approximately 6 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 241st bricknellj 0 82 17ms 30 Jan 2025 241st dokutan 0 82 17ms 15 Aug 2025 241st scpchicken 🇵🇼 0 82 402ms 2 days ago 241st KatieLG 🇬🇧 0 82 18ms 2 days ago 241st madex 🇩🇪 0 82 4ms 40 hours ago 241st MeWhenI 🇻🇦 0 82 114ms 23 mins ago 247th GolfingSuccess 🇬🇷 0 83 114ms 12 Jan 2026 247th GolfingSuccess 🇬🇷 0 83 386ms 12 Jan 2026 247th error256 0 83 430ms 12 Jan 2026 247th albanian-laundromat 0 83 9ms 26 Jan 2026 247th edsrzf 🇳🇿 0 83 473ms 17 hours ago 247th edsrzf 🇳🇿 0 83 1,251ms 15 hours ago 253rd Shanethegamer 🇺🇸 0 85 6ms 13 Dec 2024 253rd edsrzf 🇳🇿 0 85 1,065ms 25 May 2025 253rd albanian-laundromat 0 85 92ms 6 Dec 2025 253rd GolfingSuccess 🇬🇷 0 85 25ms 14 Jan 2026 253rd edsrzf 🇳🇿 0 85 28ms 14 hours ago 258th kg583 🇺🇸 0 86 23ms 2 Oct 2025 258th GolfingSuccess 🇬🇷 0 86 2,109ms 16 days ago 260th sean-niemann 🇺🇸 0 87 42ms 9 May 2025 260th CaedenHarper 🇨🇦 0 87 439ms 24 hours ago 262nd muser-logiccpu 🇺🇦 0 88 72ms 2 Sep 2025 262nd solisolu 0 88 3ms 11 Nov 2025 262nd albanian-laundromat 0 88 1,372ms 5 Jan 2026 262nd error256 0 88 3,067ms 14 Jan 2026 262nd IanUtley 0 88 2,941ms 16 Jan 2026 267th Shanethegamer 🇺🇸 0 89 99ms 13 Dec 2024 267th GolfingSuccess 🇬🇷 0 89 64ms 12 Jan 2026 269th sean-niemann 🇺🇸 0 90 7ms 10 May 2025 269th dokutan 0 90 65ms 8 Feb 2026 271st ovs-code 🇩🇪 0 91 261ms 13 Dec 2025 271st error256 0 91 62ms 12 Jan 2026 271st error256 0 91 293ms 14 Jan 2026 271st GolfingSuccess 🇬🇷 0 91 272ms 14 Jan 2026 271st Natanaelel 🇸🇪 0 91 333ms 32 hours ago 276th Shanethegamer 🇺🇸 0 92 462ms 20 May 2025 276th Yax42 🇫🇷 0 92 68ms 29 hours ago 278th Yax42 🇫🇷 0 93 392ms 30 hours ago 279th Shanethegamer 🇺🇸 0 94 383ms 13 Dec 2024 279th edsrzf 🇳🇿 0 94 459ms 20 May 2025 279th MeWhenI 🇻🇦 0 94 396ms 3 hours ago 282nd albanian-laundromat 0 95 114ms 6 Jan 2026 283rd Shanethegamer 🇺🇸 0 96 427ms 3 Jun 2025 283rd albanian-laundromat 0 96 5ms 6 Dec 2025 283rd CaedenHarper 🇨🇦 0 96 416ms 25 hours ago 283rd edsrzf 🇳🇿 0 96 32ms 25 hours ago 287th albanian-laundromat 0 97 44ms 6 Dec 2025 287th tomh1012 0 97 396ms 35 hours ago 289th kumavale 0 98 155ms 26 Nov 2025 289th error256 0 98 156ms 16 Jan 2026 289th albanian-laundromat 0 98 135ms 23 Feb 2026 292nd edsrzf 🇳🇿 0 99 468ms 9 May 2025 292nd Shanethegamer 🇺🇸 0 99 352ms 24 Sep 2025 294th edsrzf 🇳🇿 0 100 145ms 9 May 2025 294th emgordon154 0 100 7ms 9 May 2025 294th JOrE20 0 100 42ms 15 Dec 2025 297th rucin93 🇵🇱 0 101 373ms 20 days ago 298th fantaize 0 102 148ms 15 days ago 298th emgordon154 0 102 4ms 20 hours ago 300th CLOStrophobic 🇮🇹 0 104 21ms 18 Jan 2025 300th kasarino 0 104 4ms 5 hours ago 302nd kg583 🇺🇸 0 106 38ms 9 May 2025 303rd Shanethegamer 🇺🇸 0 107 8ms 9 May 2025 303rd AlephSquirrel 0 107 20ms 14 May 2025 305th CLOStrophobic 🇮🇹 0 108 47ms 17 Feb 2025 305th edsrzf 🇳🇿 0 108 1,839ms 21 May 2025 305th albanian-laundromat 0 108 31ms 5 Jan 2026 305th albanian-laundromat 0 108 83ms 16 days ago 309th kg583 🇺🇸 0 109 43ms 22 days ago 309th GolfingSuccess 🇬🇷 0 109 46ms 22 days ago 309th edsrzf 🇳🇿 0 109 43ms 18 hours ago 312th retrohun 0 111 41ms 33 hours ago 313th GolfingSuccess 🇬🇷 0 112 44ms 24 Jan 2026 314th Shanethegamer 🇺🇸 0 114 1,281ms 9 May 2025 314th error256 0 114 513ms 29 Jan 2026 314th edsrzf 🇳🇿 0 114 489ms 18 mins ago 317th GolfingSuccess 🇬🇷 0 117 269ms 12 Jan 2026 317th albanian-laundromat 0 117 43ms 14 days ago 319th CaedenHarper 🇨🇦 0 120 274ms 25 hours ago 319th emgordon154 0 120 65ms 20 hours ago First Prev 241–320 of 339 Next Last