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 238th AdrienHache 🇫🇷 0 66 421ms 2 Nov 2025 238th namelessiw 0 66 434ms 2 Nov 2025 238th GolfingSuccess 🇬🇷 0 66 430ms 4 Feb 2026 238th albanian-laundromat 0 66 1,391ms 3 days ago 238th Yax42 🇫🇷 0 66 484ms 2 days ago 238th fuzzylojik-golf 🇺🇸 0 66 456ms 43 hours ago 238th edsrzf 🇳🇿 0 66 7ms 15 hours ago 248th GolfingSuccess 🇬🇷 0 67 12ms 8 May 2025 248th tomh1012 0 67 429ms 32 hours ago 250th Shanethegamer 🇺🇸 0 68 145ms 26 Nov 2024 250th sean-niemann 🇺🇸 0 68 131ms 8 May 2025 250th edsrzf 🇳🇿 0 68 113ms 25 May 2025 250th GolfingSuccess 🇬🇷 0 68 110ms 2 days ago 250th fuzzylojik-golf 🇺🇸 0 68 1,320ms 4 hours ago 255th GolfingSuccess 🇬🇷 0 69 10ms 8 May 2025 255th CaedenHarper 🇨🇦 0 69 486ms 2 days ago 257th JOrE20 0 70 41ms 13 Feb 2026 258th kg583 🇺🇸 0 71 27ms 1 Dec 2024 258th CLOStrophobic 🇮🇹 0 71 13ms 18 Jan 2025 258th GolfingSuccess 🇬🇷 0 71 14ms 7 May 2025 258th edsrzf 🇳🇿 0 71 14ms 8 May 2025 258th AlephSquirrel 0 71 13ms 9 May 2025 263rd Shanethegamer 🇺🇸 0 72 27ms 9 Dec 2024 263rd dokutan 0 72 62ms 8 Feb 2026 265th GolfingSuccess 🇬🇷 0 73 16ms 8 May 2025 266th not-a-pokemon 0 74 15ms 3 hours ago 267th Shanethegamer 🇺🇸 0 75 99ms 26 Nov 2024 267th sean-niemann 🇺🇸 0 75 103ms 8 May 2025 267th HumanoidCPU 0 75 112ms 8 hours ago 270th GolfingSuccess 🇬🇷 0 76 133ms 28 Nov 2025 270th fuzzylojik-golf 🇺🇸 0 76 99ms 43 hours ago 270th edsrzf 🇳🇿 0 76 131ms 34 hours ago 270th emgordon154 0 76 115ms 15 hours ago 270th MeWhenI 🇻🇦 0 76 98ms 21 mins ago 275th rucin93 🇵🇱 0 77 130ms 8 May 2025 275th ovs-code 🇩🇪 0 77 81ms 30 May 2025 275th Shanethegamer 🇺🇸 0 77 146ms 12 Nov 2025 275th edsrzf 🇳🇿 0 77 7ms 29 mins ago 279th saito-ta 🇯🇵 0 78 4ms 10 May 2025 279th rhdqor213 0 78 4ms 10 May 2025 279th albanian-laundromat 0 78 100ms 3 days ago 279th fuzzylojik-golf 🇺🇸 0 78 8ms 5 hours ago 283rd GolfingSuccess 🇬🇷 0 79 79ms 14 May 2025 284th sean-niemann 🇺🇸 0 80 455ms 8 May 2025 285th kumavale 0 81 156ms 26 Nov 2025 285th Matter1024 🇮🇳 0 81 45ms 14 Feb 2026 285th albanian-laundromat 0 81 45ms 3 days ago 285th fuzzylojik-golf 🇺🇸 0 81 9ms 5 hours ago 289th GolfingSuccess 🇬🇷 0 82 502ms 8 May 2025 289th emgordon154 0 82 159ms 14 Feb 2026 289th emgordon154 0 82 518ms 17 hours ago 292nd Shanethegamer 🇺🇸 0 83 484ms 26 Nov 2024 292nd edsrzf 🇳🇿 0 83 414ms 9 Jul 2025 292nd Shanethegamer 🇺🇸 0 83 403ms 9 Jul 2025 292nd fantaize 0 83 156ms 15 days ago 292nd GolfingSuccess 🇬🇷 0 83 33ms 16 hours ago 292nd MeWhenI 🇻🇦 0 83 229ms 7 hours ago 298th Shanethegamer 🇺🇸 0 84 416ms 26 Nov 2024 298th ovs-code 🇩🇪 0 84 12ms 10 May 2025 298th fuzzylojik-golf 🇺🇸 0 84 444ms 43 hours ago 298th KasperKivimaeki 🇫🇮 0 84 12ms 2 hours ago 302nd edsrzf 🇳🇿 0 85 42ms 8 May 2025 302nd edsrzf 🇳🇿 0 85 18ms 9 May 2025 302nd error256 0 85 18ms 10 May 2025 302nd GolfingSuccess 🇬🇷 0 85 3ms 14 Jan 2026 306th Shanethegamer 🇺🇸 0 86 147ms 17 Dec 2024 306th kg583 🇺🇸 0 86 39ms 16 Feb 2025 306th GolfingSuccess 🇬🇷 0 86 44ms 7 May 2025 306th GolfingSuccess 🇬🇷 0 86 2,577ms 8 May 2025 306th edsrzf 🇳🇿 0 86 155ms 9 May 2025 306th sean-niemann 🇺🇸 0 86 496ms 25 Sep 2025 306th GolfingSuccess 🇬🇷 0 86 8ms 12 Nov 2025 306th MeWhenI 🇻🇦 0 86 381ms 21 Nov 2025 306th GolfingSuccess 🇬🇷 0 86 399ms 12 Jan 2026 306th elgan65536 🇺🇸 0 86 168ms 24 days ago 306th CaedenHarper 🇨🇦 0 86 399ms 3 days ago 306th CaedenHarper 🇨🇦 0 86 153ms 2 days ago 306th edsrzf 🇳🇿 0 86 414ms 16 hours ago 306th emgordon154 0 86 406ms 3 hours ago 320th Shanethegamer 🇺🇸 0 87 42ms 15 Apr 2025 First Prev 241–320 of 392 Next Last