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 317th emgordon154 0 89 400ms 11 hours ago 322nd Yax42 🇫🇷 0 90 13ms 20 hours ago 323rd GolfingSuccess 🇬🇷 0 91 14ms 13 Dec 2025 324th namelessiw 0 92 504ms 10 Oct 2025 324th fuzzylojik-golf 🇺🇸 0 92 390ms 36 hours ago 324th madex 🇩🇪 0 92 12ms 15 hours ago 327th CaedenHarper 🇨🇦 0 93 13ms 3 days ago 328th DialFrost 🇸🇬 0 94 13ms 10 May 2025 328th edsrzf 🇳🇿 0 94 187ms 17 May 2025 330th Yax42 🇫🇷 0 95 389ms 19 hours ago 331st GolfingSuccess 🇬🇷 0 96 182ms 7 May 2025 331st HumanoidCPU 0 96 160ms 13 hours ago 333rd Shanethegamer 🇺🇸 0 98 7ms 6 May 2025 334th snydej 0 99 43ms 22 Nov 2024 334th albanian-laundromat 0 99 343ms 3 days ago 334th dokutan 0 99 409ms 114 mins ago 337th dokutan 0 100 19ms 110 mins ago 338th sean-niemann 🇺🇸 0 102 286ms 8 May 2025 338th Shanethegamer 🇺🇸 0 102 307ms 8 May 2025 338th edsrzf 🇳🇿 0 102 295ms 9 May 2025 338th GolfingSuccess 🇬🇷 0 102 306ms 9 May 2025 338th ovs-code 🇩🇪 0 102 311ms 13 Dec 2025 338th CaedenHarper 🇨🇦 0 102 301ms 3 days ago 338th fuzzylojik-golf 🇺🇸 0 102 292ms 36 hours ago 338th emgordon154 0 102 274ms 7 hours ago 346th lukechampine 0 103 301ms 7 Jun 2025 346th chris124567 0 103 294ms 8 Jun 2025 346th albanian-laundromat 0 103 270ms 16 Dec 2025 346th GolfingSuccess 🇬🇷 0 103 336ms 14 Jan 2026 350th edsrzf 🇳🇿 0 104 17ms 19 hours ago 351st UnderKoen 🇳🇱 0 107 2,121ms 50 mins ago 352nd kg583 🇺🇸 0 110 14ms 12 Jan 2026 352nd HumanoidCPU 0 110 363ms 112 mins ago 354th retrohun 0 112 16ms 24 hours ago 355th prestosilver 🇺🇸 0 115 418ms 22 hours ago 356th GolfingSuccess 🇬🇷 0 117 34ms 25 Dec 2025 357th GolfingSuccess 🇬🇷 0 118 94ms 7 hours ago 358th emgordon154 0 119 56ms 9 hours ago 359th edsrzf 🇳🇿 0 123 30ms 14 hours ago 360th edsrzf 🇳🇿 0 127 58ms 3 hours ago 361st saito-ta 🇯🇵 0 128 1,990ms 8 May 2025 362nd CaedenHarper 🇨🇦 0 129 446ms 3 days ago 363rd Natanaelel 🇸🇪 0 130 360ms 2 May 2025 364th Shanethegamer 🇺🇸 0 136 315ms 26 Nov 2024 365th albanian-laundromat 0 137 27ms 3 days ago 366th GolfingSuccess 🇬🇷 0 138 336ms 8 May 2025 367th canissimia 🇦🇶 0 143 15ms 7 hours ago 368th emgordon154 0 150 15ms 9 May 2025 368th albanian-laundromat 0 150 28ms 3 days ago 370th GolfingSuccess 🇬🇷 0 152 84ms 4 days ago 371st JOrE20 0 159 69ms 14 Feb 2026 372nd RYSF13 🇨🇳 0 168 13ms 25 Jun 2025 373rd Shanethegamer 🇺🇸 0 197 1,442ms 1 Feb 2025 374th voytxt 🇨🇿 0 200 1,425ms 6 Feb 2026 374th GolfingSuccess 🇬🇷 0 200 1,407ms 10 hours ago 376th emgordon154 0 202 1,464ms 9 hours ago 377th albanian-laundromat 0 243 15ms 3 days ago 378th albanian-laundromat 0 256 115ms 2 days ago 379th JOrE20 0 381 2,653ms 29 Dec 2025 380th CaedenHarper 🇨🇦 0 853 550ms 2 days ago First Prev 321–380 of 380
