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 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 240th CaedenHarper 🇨🇦 0 69 486ms 2 days ago 242nd JOrE20 0 70 41ms 13 Feb 2026 243rd kg583 🇺🇸 0 71 27ms 1 Dec 2024 243rd CLOStrophobic 🇮🇹 0 71 13ms 18 Jan 2025 243rd GolfingSuccess 🇬🇷 0 71 14ms 7 May 2025 243rd edsrzf 🇳🇿 0 71 14ms 8 May 2025 243rd AlephSquirrel 0 71 13ms 9 May 2025 248th Shanethegamer 🇺🇸 0 72 27ms 9 Dec 2024 248th dokutan 0 72 62ms 8 Feb 2026 250th GolfingSuccess 🇬🇷 0 73 16ms 8 May 2025 251st Shanethegamer 🇺🇸 0 75 99ms 26 Nov 2024 251st sean-niemann 🇺🇸 0 75 103ms 8 May 2025 253rd GolfingSuccess 🇬🇷 0 76 133ms 28 Nov 2025 253rd fuzzylojik-golf 🇺🇸 0 76 104ms 33 hours ago 253rd edsrzf 🇳🇿 0 76 131ms 25 hours ago 253rd emgordon154 0 76 115ms 6 hours ago 257th rucin93 🇵🇱 0 77 130ms 8 May 2025 257th ovs-code 🇩🇪 0 77 81ms 30 May 2025 257th Shanethegamer 🇺🇸 0 77 146ms 12 Nov 2025 260th saito-ta 🇯🇵 0 78 4ms 10 May 2025 260th rhdqor213 0 78 4ms 10 May 2025 260th albanian-laundromat 0 78 100ms 3 days ago 263rd GolfingSuccess 🇬🇷 0 79 79ms 14 May 2025 264th sean-niemann 🇺🇸 0 80 455ms 8 May 2025 265th kumavale 0 81 156ms 26 Nov 2025 265th Matter1024 🇮🇳 0 81 45ms 14 Feb 2026 265th albanian-laundromat 0 81 45ms 3 days ago 268th GolfingSuccess 🇬🇷 0 82 502ms 8 May 2025 268th emgordon154 0 82 162ms 14 Feb 2026 268th emgordon154 0 82 518ms 7 hours ago 271st Shanethegamer 🇺🇸 0 83 484ms 26 Nov 2024 271st edsrzf 🇳🇿 0 83 414ms 9 Jul 2025 271st Shanethegamer 🇺🇸 0 83 403ms 9 Jul 2025 271st fantaize 0 83 156ms 14 days ago 271st GolfingSuccess 🇬🇷 0 83 33ms 7 hours ago 276th Shanethegamer 🇺🇸 0 84 416ms 26 Nov 2024 276th ovs-code 🇩🇪 0 84 12ms 10 May 2025 276th fuzzylojik-golf 🇺🇸 0 84 444ms 33 hours ago 276th MeWhenI 🇻🇦 0 84 215ms 8 hours ago 280th edsrzf 🇳🇿 0 85 42ms 8 May 2025 280th edsrzf 🇳🇿 0 85 18ms 9 May 2025 280th error256 0 85 18ms 10 May 2025 280th GolfingSuccess 🇬🇷 0 85 3ms 14 Jan 2026 280th KasperKivimaeki 🇫🇮 0 85 12ms 3 hours ago 285th Shanethegamer 🇺🇸 0 86 147ms 17 Dec 2024 285th kg583 🇺🇸 0 86 39ms 16 Feb 2025 285th GolfingSuccess 🇬🇷 0 86 44ms 7 May 2025 285th GolfingSuccess 🇬🇷 0 86 2,577ms 8 May 2025 285th edsrzf 🇳🇿 0 86 155ms 9 May 2025 285th sean-niemann 🇺🇸 0 86 496ms 25 Sep 2025 285th GolfingSuccess 🇬🇷 0 86 8ms 12 Nov 2025 285th MeWhenI 🇻🇦 0 86 381ms 21 Nov 2025 285th GolfingSuccess 🇬🇷 0 86 399ms 12 Jan 2026 285th elgan65536 🇺🇸 0 86 168ms 24 days ago 285th CaedenHarper 🇨🇦 0 86 399ms 3 days ago 285th CaedenHarper 🇨🇦 0 86 153ms 2 days ago 285th edsrzf 🇳🇿 0 86 414ms 7 hours ago 298th Shanethegamer 🇺🇸 0 87 42ms 15 Apr 2025 298th GolfingSuccess 🇬🇷 0 87 18ms 8 May 2025 298th Shanethegamer 🇺🇸 0 87 20ms 8 May 2025 298th albanian-laundromat 0 87 1,424ms 3 days ago 298th Yax42 🇫🇷 0 87 2,430ms 16 hours ago 303rd GolfingSuccess 🇬🇷 0 88 5ms 12 Nov 2025 303rd kg583 🇺🇸 0 88 23ms 12 Feb 2026 303rd fuzzylojik-golf 🇺🇸 0 88 152ms 31 hours ago 306th Shanethegamer 🇺🇸 0 89 341ms 6 May 2025 306th Shanethegamer 🇺🇸 0 89 511ms 24 Sep 2025 306th DialFrost 🇸🇬 0 89 367ms 21 Nov 2025 306th CaedenHarper 🇨🇦 0 89 103ms 2 days ago 306th emgordon154 0 89 400ms 8 hours ago 311th Yax42 🇫🇷 0 90 13ms 16 hours ago 312th GolfingSuccess 🇬🇷 0 91 14ms 13 Dec 2025 313th namelessiw 0 92 504ms 10 Oct 2025 313th fuzzylojik-golf 🇺🇸 0 92 390ms 32 hours ago 313th madex 🇩🇪 0 92 12ms 11 hours ago 316th CaedenHarper 🇨🇦 0 93 13ms 3 days ago 317th DialFrost 🇸🇬 0 94 13ms 10 May 2025 317th edsrzf 🇳🇿 0 94 187ms 17 May 2025 319th Yax42 🇫🇷 0 95 389ms 16 hours ago 320th GolfingSuccess 🇬🇷 0 96 182ms 7 May 2025 First Prev 241–320 of 366 Next Last