The Gray Code Decoder and Gray Code Encoder holes will go live in approximately 28 hours. 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 400th Shanethegamer 🇺🇸 0 87 20ms 8 May 2025 400th albanian-laundromat 0 87 1,424ms 8 days ago 400th Yax42 🇫🇷 0 87 2,340ms 6 days ago 400th Steffan153 🇫🇮 0 87 180ms 4 days ago 400th Steffan153 🇫🇮 0 87 4ms 3 days ago 400th roelderickx 0 87 1,609ms 3 days ago 400th aadenboy 🇺🇸 0 87 7ms 4 hours ago 408th kg583 🇺🇸 0 88 23ms 12 Feb 2026 408th fuzzylojik-golf 🇺🇸 0 88 154ms 6 days ago 408th ovs-code 🇩🇪 0 88 167ms 34 hours ago 408th DialFrost 🇸🇬 0 88 101ms 28 hours ago 408th Msleizak 🇫🇷 0 88 412ms 7 hours ago 413th Shanethegamer 🇺🇸 0 89 341ms 6 May 2025 413th Shanethegamer 🇺🇸 0 89 511ms 24 Sep 2025 413th DialFrost 🇸🇬 0 89 367ms 21 Nov 2025 413th CaedenHarper 🇨🇦 0 89 103ms 7 days ago 413th madex 🇩🇪 0 89 174ms 3 days ago 413th edsrzf 🇳🇿 0 89 334ms 3 days ago 413th Yax42 🇫🇷 0 89 13ms 3 days ago 413th dokutan 0 89 476ms 3 days ago 413th DialFrost 🇸🇬 0 89 13ms 28 hours ago 422nd solisolu 0 90 4ms 45 hours ago 422nd h3ra993huskp 🇯🇵 0 90 434ms 39 hours ago 424th namelessiw 0 92 504ms 10 Oct 2025 424th fuzzylojik-golf 🇺🇸 0 92 383ms 6 days ago 424th madex 🇩🇪 0 92 12ms 5 days ago 427th edsrzf 🇳🇿 0 93 187ms 17 May 2025 427th CaedenHarper 🇨🇦 0 93 13ms 9 days ago 429th edsrzf 🇳🇿 0 94 21ms 5 days ago 430th Yax42 🇫🇷 0 95 389ms 6 days ago 431st GolfingSuccess 🇬🇷 0 96 182ms 7 May 2025 431st HumanoidCPU 0 96 166ms 5 days ago 433rd HumanoidCPU 0 97 7ms 3 days ago 434th Shanethegamer 🇺🇸 0 98 7ms 6 May 2025 435th snydej 0 99 43ms 22 Nov 2024 435th albanian-laundromat 0 99 343ms 8 days ago 435th dokutan 0 99 409ms 5 days ago 435th dokutan 0 99 12ms 3 days ago 439th HumanoidCPU 0 101 361ms 4 days ago 439th HumanoidCPU 0 101 382ms 4 days ago 441st sean-niemann 🇺🇸 0 102 286ms 8 May 2025 441st Shanethegamer 🇺🇸 0 102 307ms 8 May 2025 441st edsrzf 🇳🇿 0 102 295ms 9 May 2025 441st GolfingSuccess 🇬🇷 0 102 306ms 9 May 2025 441st ovs-code 🇩🇪 0 102 311ms 13 Dec 2025 441st kg583 🇺🇸 0 102 13ms 25 Jan 2026 441st CaedenHarper 🇨🇦 0 102 301ms 9 days ago 441st fuzzylojik-golf 🇺🇸 0 102 292ms 6 days ago 441st emgordon154 0 102 274ms 5 days ago 441st edsrzf 🇳🇿 0 102 341ms 4 days ago 441st Steffan153 🇫🇮 0 102 338ms 4 days ago 441st Steffan153 🇫🇮 0 102 284ms 3 days ago 441st MeWhenI 🇻🇦 0 102 287ms 3 days ago 454th lukechampine 0 103 301ms 7 Jun 2025 454th chris124567 0 103 294ms 8 Jun 2025 454th albanian-laundromat 0 103 270ms 16 Dec 2025 454th GolfingSuccess 🇬🇷 0 103 336ms 14 Jan 2026 454th HumanoidCPU 0 103 329ms 4 days ago 454th Jacob385 0 103 411ms 2 days ago 460th madex 🇩🇪 0 104 226ms 3 days ago 461st madex 🇩🇪 0 106 334ms 2 days ago 462nd UnderKoen 🇳🇱 0 107 2,121ms 5 days ago 463rd HumanoidCPU 0 108 13ms 3 days ago 464th edsrzf 🇳🇿 0 109 21ms 4 days ago 464th emgordon154 0 109 84ms 3 days ago 466th Steffan153 🇫🇮 0 110 28ms 4 days ago 466th edsrzf 🇳🇿 0 110 31ms 4 days ago 468th GolfingSuccess 🇬🇷 0 111 107ms 4 days ago 469th retrohun 0 112 16ms 6 days ago 469th edsrzf 🇳🇿 0 112 27ms 4 days ago 469th madex 🇩🇪 0 112 1,387ms 2 days ago 472nd prestosilver 🇺🇸 0 115 418ms 6 days ago 472nd HumanoidCPU 0 115 260ms 4 days ago 474th GolfingSuccess 🇬🇷 0 117 34ms 25 Dec 2025 475th madex 🇩🇪 0 118 17ms 2 days ago 476th not-a-pokemon 0 119 15ms 5 days ago 477th madex 🇩🇪 0 121 366ms 2 days ago 478th edsrzf 🇳🇿 0 127 58ms 5 days ago 478th Steffan153 🇫🇮 0 127 57ms 3 days ago 480th saito-ta 🇯🇵 0 128 1,990ms 8 May 2025 First Prev 401–480 of 510 Next Last