The Gray Code Decoder and Gray Code Encoder holes will go live in approximately 44 hours. 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 397th Steffan153 🇫🇮 0 87 180ms 3 days ago 397th Steffan153 🇫🇮 0 87 4ms 3 days ago 397th roelderickx 0 87 1,609ms 2 days ago 404th kg583 🇺🇸 0 88 23ms 12 Feb 2026 404th fuzzylojik-golf 🇺🇸 0 88 154ms 6 days ago 404th ovs-code 🇩🇪 0 88 167ms 17 hours ago 404th DialFrost 🇸🇬 0 88 101ms 11 hours ago 408th Shanethegamer 🇺🇸 0 89 341ms 6 May 2025 408th Shanethegamer 🇺🇸 0 89 511ms 24 Sep 2025 408th DialFrost 🇸🇬 0 89 367ms 21 Nov 2025 408th CaedenHarper 🇨🇦 0 89 103ms 7 days ago 408th madex 🇩🇪 0 89 174ms 3 days ago 408th edsrzf 🇳🇿 0 89 334ms 2 days ago 408th Yax42 🇫🇷 0 89 13ms 2 days ago 408th dokutan 0 89 476ms 2 days ago 408th DialFrost 🇸🇬 0 89 13ms 11 hours ago 417th solisolu 0 90 4ms 28 hours ago 417th h3ra993huskp 🇯🇵 0 90 434ms 22 hours ago 419th namelessiw 0 92 504ms 10 Oct 2025 419th fuzzylojik-golf 🇺🇸 0 92 383ms 6 days ago 419th madex 🇩🇪 0 92 12ms 5 days ago 422nd CaedenHarper 🇨🇦 0 93 13ms 8 days ago 423rd edsrzf 🇳🇿 0 94 187ms 17 May 2025 423rd edsrzf 🇳🇿 0 94 21ms 4 days ago 425th Yax42 🇫🇷 0 95 389ms 5 days ago 426th GolfingSuccess 🇬🇷 0 96 182ms 7 May 2025 426th HumanoidCPU 0 96 166ms 5 days ago 428th HumanoidCPU 0 97 7ms 3 days ago 429th Shanethegamer 🇺🇸 0 98 7ms 6 May 2025 430th snydej 0 99 43ms 22 Nov 2024 430th albanian-laundromat 0 99 343ms 8 days ago 430th dokutan 0 99 409ms 4 days ago 430th dokutan 0 99 12ms 2 days ago 434th dokutan 0 100 19ms 4 days ago 435th HumanoidCPU 0 101 361ms 4 days ago 435th HumanoidCPU 0 101 382ms 4 days ago 437th sean-niemann 🇺🇸 0 102 286ms 8 May 2025 437th Shanethegamer 🇺🇸 0 102 307ms 8 May 2025 437th edsrzf 🇳🇿 0 102 295ms 9 May 2025 437th GolfingSuccess 🇬🇷 0 102 306ms 9 May 2025 437th ovs-code 🇩🇪 0 102 311ms 13 Dec 2025 437th CaedenHarper 🇨🇦 0 102 301ms 8 days ago 437th fuzzylojik-golf 🇺🇸 0 102 292ms 6 days ago 437th emgordon154 0 102 274ms 4 days ago 437th edsrzf 🇳🇿 0 102 341ms 3 days ago 437th Steffan153 🇫🇮 0 102 338ms 3 days ago 437th Steffan153 🇫🇮 0 102 284ms 3 days ago 437th MeWhenI 🇻🇦 0 102 287ms 2 days ago 449th lukechampine 0 103 301ms 7 Jun 2025 449th chris124567 0 103 294ms 8 Jun 2025 449th albanian-laundromat 0 103 270ms 16 Dec 2025 449th GolfingSuccess 🇬🇷 0 103 336ms 14 Jan 2026 449th HumanoidCPU 0 103 329ms 4 days ago 449th Jacob385 0 103 411ms 33 hours ago 455th madex 🇩🇪 0 104 226ms 2 days ago 456th madex 🇩🇪 0 106 334ms 31 hours ago 457th UnderKoen 🇳🇱 0 107 2,121ms 4 days ago 458th HumanoidCPU 0 108 13ms 3 days ago 459th edsrzf 🇳🇿 0 109 21ms 3 days ago 459th emgordon154 0 109 84ms 3 days ago 461st kg583 🇺🇸 0 110 14ms 12 Jan 2026 461st Steffan153 🇫🇮 0 110 28ms 3 days ago 461st edsrzf 🇳🇿 0 110 31ms 3 days ago 464th GolfingSuccess 🇬🇷 0 111 107ms 4 days ago 465th retrohun 0 112 16ms 5 days ago 465th edsrzf 🇳🇿 0 112 27ms 3 days ago 465th madex 🇩🇪 0 112 1,387ms 31 hours ago 468th prestosilver 🇺🇸 0 115 418ms 5 days ago 468th HumanoidCPU 0 115 260ms 4 days ago 470th GolfingSuccess 🇬🇷 0 117 34ms 25 Dec 2025 471st madex 🇩🇪 0 118 17ms 31 hours ago 472nd not-a-pokemon 0 119 15ms 4 days ago 473rd madex 🇩🇪 0 121 366ms 31 hours ago 474th edsrzf 🇳🇿 0 127 58ms 4 days ago 474th Steffan153 🇫🇮 0 127 57ms 3 days ago 476th saito-ta 🇯🇵 0 128 1,990ms 8 May 2025 477th CaedenHarper 🇨🇦 0 129 446ms 8 days ago 478th Natanaelel 🇸🇪 0 130 360ms 2 May 2025 478th madex 🇩🇪 0 130 412ms 2 days ago 478th madex 🇩🇪 0 130 269ms 32 hours ago First Prev 401–480 of 506 Next Last