The Gray Code Decoder and Gray Code Encoder holes will go live in approximately 4 days. Why not try and solve them ahead of time?
Gray Code Encoder in all languages in chars. 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 Chars Time Submitted 401st Yax42 🇫🇷 0 95 389ms 2 days ago 402nd GolfingSuccess 🇬🇷 0 96 182ms 7 May 2025 402nd HumanoidCPU 0 96 166ms 2 days ago 404th HumanoidCPU 0 97 7ms 10 hours ago 405th Shanethegamer 🇺🇸 0 98 7ms 6 May 2025 406th snydej 0 99 43ms 22 Nov 2024 406th albanian-laundromat 0 99 343ms 5 days ago 406th dokutan 0 99 409ms 2 days ago 406th dokutan 0 99 12ms 2 hours ago 410th dokutan 0 100 19ms 2 days ago 410th ovs-code 🇩🇪 0 100 160ms 19 hours ago 412th HumanoidCPU 0 101 361ms 37 hours ago 412th HumanoidCPU 0 101 382ms 35 hours ago 414th sean-niemann 🇺🇸 0 102 286ms 8 May 2025 414th Shanethegamer 🇺🇸 0 102 307ms 8 May 2025 414th edsrzf 🇳🇿 0 102 295ms 9 May 2025 414th GolfingSuccess 🇬🇷 0 102 306ms 9 May 2025 414th ovs-code 🇩🇪 0 102 311ms 13 Dec 2025 414th kg583 🇺🇸 0 102 13ms 25 Jan 2026 414th CaedenHarper 🇨🇦 0 102 301ms 5 days ago 414th fuzzylojik-golf 🇺🇸 0 102 292ms 3 days ago 414th emgordon154 0 102 274ms 2 days ago 414th edsrzf 🇳🇿 0 102 341ms 27 hours ago 414th Steffan153 🇫🇮 0 102 338ms 19 hours ago 414th Steffan153 🇫🇮 0 102 284ms 15 hours ago 414th MeWhenI 🇻🇦 0 102 287ms 2 hours ago 427th lukechampine 0 103 301ms 7 Jun 2025 427th chris124567 0 103 294ms 8 Jun 2025 427th albanian-laundromat 0 103 270ms 16 Dec 2025 427th GolfingSuccess 🇬🇷 0 103 336ms 14 Jan 2026 427th HumanoidCPU 0 103 329ms 35 hours ago 432nd madex 🇩🇪 0 104 226ms 4 hours ago 433rd UnderKoen 🇳🇱 0 107 2,121ms 47 hours ago 434th HumanoidCPU 0 108 13ms 11 hours ago 435th edsrzf 🇳🇿 0 109 21ms 29 hours ago 435th emgordon154 0 109 84ms 15 hours ago 437th Steffan153 🇫🇮 0 110 28ms 18 hours ago 437th edsrzf 🇳🇿 0 110 31ms 17 hours ago 439th GolfingSuccess 🇬🇷 0 111 107ms 33 hours ago 440th retrohun 0 112 16ms 2 days ago 440th edsrzf 🇳🇿 0 112 27ms 31 hours ago 442nd prestosilver 🇺🇸 0 115 418ms 2 days ago 442nd HumanoidCPU 0 115 260ms 35 hours ago 444th GolfingSuccess 🇬🇷 0 117 34ms 25 Dec 2025 445th not-a-pokemon 0 119 15ms 44 hours ago 446th edsrzf 🇳🇿 0 127 58ms 2 days ago 446th Steffan153 🇫🇮 0 127 57ms 15 hours ago 448th saito-ta 🇯🇵 0 128 1,990ms 8 May 2025 449th CaedenHarper 🇨🇦 0 129 446ms 5 days ago 450th Natanaelel 🇸🇪 0 130 360ms 2 May 2025 450th madex 🇩🇪 0 130 412ms 4 hours ago 452nd edsrzf 🇳🇿 0 134 22ms 34 hours ago 453rd GolfingSuccess 🇬🇷 0 135 80ms 21 mins ago 454th Shanethegamer 🇺🇸 0 136 315ms 26 Nov 2024 455th albanian-laundromat 0 137 27ms 5 days ago 456th GolfingSuccess 🇬🇷 0 138 336ms 8 May 2025 457th dokutan 0 141 287ms 2 hours ago 458th canissimia 🇦🇶 0 143 15ms 2 days ago 459th emgordon154 0 150 15ms 9 May 2025 459th albanian-laundromat 0 150 28ms 5 days ago 461st kasarino 0 157 12ms 42 hours ago 462nd dokutan 0 158 74ms 2 hours ago 463rd JOrE20 0 159 69ms 14 Feb 2026 464th emgordon154 0 162 1,822ms 31 hours ago 465th RYSF13 🇨🇳 0 168 13ms 25 Jun 2025 466th Shanethegamer 🇺🇸 0 197 1,504ms 1 Feb 2025 467th emgordon154 0 199 1,509ms 38 hours ago 468th voytxt 🇨🇿 0 200 1,471ms 6 Feb 2026 468th GolfingSuccess 🇬🇷 0 200 1,564ms 2 days ago 468th HumanoidCPU 0 200 408ms 11 hours ago 471st albanian-laundromat 0 235 112ms 35 hours ago 472nd ovs-code 🇩🇪 0 237 107ms 37 hours ago 473rd albanian-laundromat 0 243 15ms 5 days ago 474th JOrE20 0 381 2,653ms 29 Dec 2025 475th CaedenHarper 🇨🇦 0 853 550ms 4 days 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