The Gray Code Decoder and Gray Code Encoder holes will go live in approximately 8 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 230th CaedenHarper 🇨🇦 0 86 153ms 21 hours ago 242nd Shanethegamer 🇺🇸 0 87 42ms 15 Apr 2025 242nd GolfingSuccess 🇬🇷 0 87 18ms 8 May 2025 242nd Shanethegamer 🇺🇸 0 87 20ms 8 May 2025 242nd albanian-laundromat 0 87 1,424ms 43 hours ago 246th GolfingSuccess 🇬🇷 0 88 6ms 12 Nov 2025 246th kg583 🇺🇸 0 88 23ms 12 Feb 2026 248th Shanethegamer 🇺🇸 0 89 341ms 6 May 2025 248th Shanethegamer 🇺🇸 0 89 511ms 24 Sep 2025 248th DialFrost 🇸🇬 0 89 367ms 21 Nov 2025 248th CaedenHarper 🇨🇦 0 89 103ms 22 hours ago 252nd KasperKivimaeki 🇫🇮 0 91 13ms 8 May 2025 252nd GolfingSuccess 🇬🇷 0 91 14ms 13 Dec 2025 254th namelessiw 0 92 504ms 10 Oct 2025 255th CaedenHarper 🇨🇦 0 93 13ms 2 days ago 256th DialFrost 🇸🇬 0 94 13ms 10 May 2025 256th edsrzf 🇳🇿 0 94 187ms 17 May 2025 258th GolfingSuccess 🇬🇷 0 96 182ms 7 May 2025 259th Shanethegamer 🇺🇸 0 98 7ms 6 May 2025 260th snydej 0 99 43ms 22 Nov 2024 260th albanian-laundromat 0 99 343ms 47 hours ago 262nd sean-niemann 🇺🇸 0 102 286ms 8 May 2025 262nd Shanethegamer 🇺🇸 0 102 307ms 8 May 2025 262nd edsrzf 🇳🇿 0 102 295ms 9 May 2025 262nd GolfingSuccess 🇬🇷 0 102 306ms 9 May 2025 262nd ovs-code 🇩🇪 0 102 311ms 13 Dec 2025 262nd CaedenHarper 🇨🇦 0 102 301ms 2 days ago 268th lukechampine 0 103 301ms 7 Jun 2025 268th chris124567 0 103 294ms 8 Jun 2025 268th albanian-laundromat 0 103 294ms 16 Dec 2025 268th GolfingSuccess 🇬🇷 0 103 336ms 14 Jan 2026 272nd kg583 🇺🇸 0 110 14ms 12 Jan 2026 273rd edsrzf 🇳🇿 0 114 18ms 10 May 2025 274th GolfingSuccess 🇬🇷 0 117 34ms 25 Dec 2025 275th saito-ta 🇯🇵 0 128 1,990ms 8 May 2025 276th CaedenHarper 🇨🇦 0 129 455ms 2 days ago 277th Natanaelel 🇸🇪 0 130 335ms 2 May 2025 278th Shanethegamer 🇺🇸 0 136 315ms 26 Nov 2024 279th albanian-laundromat 0 137 27ms 42 hours ago 280th GolfingSuccess 🇬🇷 0 138 336ms 8 May 2025 281st emgordon154 0 150 15ms 9 May 2025 281st albanian-laundromat 0 150 28ms 43 hours ago 283rd GolfingSuccess 🇬🇷 0 152 84ms 3 days ago 284th JOrE20 0 159 69ms 14 Feb 2026 285th RYSF13 🇨🇳 0 168 13ms 25 Jun 2025 286th Shanethegamer 🇺🇸 0 197 1,442ms 1 Feb 2025 287th voytxt 🇨🇿 0 200 1,425ms 6 Feb 2026 288th GolfingSuccess 🇬🇷 0 219 1,452ms 13 Dec 2025 289th albanian-laundromat 0 243 15ms 45 hours ago 290th albanian-laundromat 0 256 117ms 9 hours ago 291st JOrE20 0 381 2,673ms 29 Dec 2025 292nd CaedenHarper 🇨🇦 0 853 550ms 24 hours ago First Prev 241–292 of 292