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 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 241st sean-niemann 🇺🇸 0 80 455ms 8 May 2025 242nd kumavale 0 81 156ms 26 Nov 2025 242nd Matter1024 🇮🇳 0 81 45ms 14 Feb 2026 242nd albanian-laundromat 0 81 46ms 2 days ago 245th GolfingSuccess 🇬🇷 0 82 502ms 8 May 2025 245th emgordon154 0 82 162ms 14 Feb 2026 247th Shanethegamer 🇺🇸 0 83 484ms 26 Nov 2024 247th edsrzf 🇳🇿 0 83 414ms 9 Jul 2025 247th Shanethegamer 🇺🇸 0 83 403ms 9 Jul 2025 247th fantaize 0 83 156ms 13 days ago 251st Shanethegamer 🇺🇸 0 84 416ms 26 Nov 2024 251st ovs-code 🇩🇪 0 84 12ms 10 May 2025 251st fuzzylojik-golf 🇺🇸 0 84 444ms 14 hours ago 254th GolfingSuccess 🇬🇷 0 85 46ms 8 May 2025 254th edsrzf 🇳🇿 0 85 42ms 8 May 2025 254th edsrzf 🇳🇿 0 85 18ms 9 May 2025 254th error256 0 85 18ms 10 May 2025 254th GolfingSuccess 🇬🇷 0 85 3ms 14 Jan 2026 259th Shanethegamer 🇺🇸 0 86 147ms 17 Dec 2024 259th kg583 🇺🇸 0 86 39ms 16 Feb 2025 259th GolfingSuccess 🇬🇷 0 86 44ms 7 May 2025 259th GolfingSuccess 🇬🇷 0 86 2,431ms 8 May 2025 259th edsrzf 🇳🇿 0 86 155ms 9 May 2025 259th sean-niemann 🇺🇸 0 86 496ms 25 Sep 2025 259th GolfingSuccess 🇬🇷 0 86 8ms 12 Nov 2025 259th MeWhenI 🇻🇦 0 86 381ms 21 Nov 2025 259th GolfingSuccess 🇬🇷 0 86 399ms 12 Jan 2026 259th elgan65536 🇺🇸 0 86 168ms 23 days ago 259th CaedenHarper 🇨🇦 0 86 399ms 2 days ago 259th CaedenHarper 🇨🇦 0 86 153ms 38 hours ago 271st Shanethegamer 🇺🇸 0 87 42ms 15 Apr 2025 271st GolfingSuccess 🇬🇷 0 87 18ms 8 May 2025 271st Shanethegamer 🇺🇸 0 87 20ms 8 May 2025 271st albanian-laundromat 0 87 1,424ms 2 days ago 275th GolfingSuccess 🇬🇷 0 88 6ms 12 Nov 2025 275th kg583 🇺🇸 0 88 23ms 12 Feb 2026 275th fuzzylojik-golf 🇺🇸 0 88 152ms 11 hours ago 278th Shanethegamer 🇺🇸 0 89 341ms 6 May 2025 278th Shanethegamer 🇺🇸 0 89 511ms 24 Sep 2025 278th DialFrost 🇸🇬 0 89 367ms 21 Nov 2025 278th CaedenHarper 🇨🇦 0 89 103ms 38 hours ago 282nd KasperKivimaeki 🇫🇮 0 91 13ms 8 May 2025 282nd GolfingSuccess 🇬🇷 0 91 14ms 13 Dec 2025 284th namelessiw 0 92 504ms 10 Oct 2025 284th fuzzylojik-golf 🇺🇸 0 92 390ms 12 hours ago 286th CaedenHarper 🇨🇦 0 93 13ms 2 days ago 287th DialFrost 🇸🇬 0 94 13ms 10 May 2025 287th edsrzf 🇳🇿 0 94 187ms 17 May 2025 289th GolfingSuccess 🇬🇷 0 96 182ms 7 May 2025 290th Shanethegamer 🇺🇸 0 98 7ms 6 May 2025 291st snydej 0 99 43ms 22 Nov 2024 291st albanian-laundromat 0 99 343ms 2 days ago 293rd sean-niemann 🇺🇸 0 102 286ms 8 May 2025 293rd Shanethegamer 🇺🇸 0 102 307ms 8 May 2025 293rd edsrzf 🇳🇿 0 102 295ms 9 May 2025 293rd GolfingSuccess 🇬🇷 0 102 306ms 9 May 2025 293rd ovs-code 🇩🇪 0 102 311ms 13 Dec 2025 293rd CaedenHarper 🇨🇦 0 102 301ms 2 days ago 293rd fuzzylojik-golf 🇺🇸 0 102 292ms 13 hours ago 300th lukechampine 0 103 301ms 7 Jun 2025 300th chris124567 0 103 294ms 8 Jun 2025 300th albanian-laundromat 0 103 294ms 16 Dec 2025 300th GolfingSuccess 🇬🇷 0 103 336ms 14 Jan 2026 304th kg583 🇺🇸 0 110 14ms 12 Jan 2026 305th retrohun 0 112 16ms 46 mins ago 306th edsrzf 🇳🇿 0 114 18ms 10 May 2025 307th GolfingSuccess 🇬🇷 0 117 34ms 25 Dec 2025 308th saito-ta 🇯🇵 0 128 1,990ms 8 May 2025 309th CaedenHarper 🇨🇦 0 129 455ms 2 days ago 310th Natanaelel 🇸🇪 0 130 335ms 2 May 2025 311th Shanethegamer 🇺🇸 0 136 315ms 26 Nov 2024 312th albanian-laundromat 0 137 27ms 2 days ago 313th GolfingSuccess 🇬🇷 0 138 336ms 8 May 2025 314th emgordon154 0 150 15ms 9 May 2025 314th albanian-laundromat 0 150 28ms 2 days ago 316th GolfingSuccess 🇬🇷 0 152 84ms 3 days ago 317th JOrE20 0 159 69ms 14 Feb 2026 318th RYSF13 🇨🇳 0 168 13ms 25 Jun 2025 319th Shanethegamer 🇺🇸 0 197 1,442ms 1 Feb 2025 320th voytxt 🇨🇿 0 200 1,425ms 6 Feb 2026 First Prev 241–320 of 325 Next Last