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 Decoder 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 234th SirBogman 🇺🇸 0 77 232ms 13 Oct 2025 234th jtaxen 0 77 19ms 16 Oct 2025 234th albanian-laundromat 0 77 412ms 6 Dec 2025 234th Matter1024 🇮🇳 0 77 17ms 12 Feb 2026 234th KasperKivimaeki 🇫🇮 0 77 564ms 11 days ago 234th StefanHabel 🇨🇦 0 77 1,217ms 3 days ago 234th ahmetdemirag 🇨🇾 0 77 18ms 3 days ago 234th tomh1012 0 77 17ms 3 days ago 234th qpwoeirut 0 77 20ms 2 days ago 234th btjones0 0 77 19ms 2 days ago 234th ComradeSquirrel 0 77 18ms 2 days ago 234th bzijlema 🇳🇱 0 77 18ms 2 days ago 234th Lv0Sys 🇵🇱 0 77 18ms 26 hours ago 254th jameswmccarty 0 78 20ms 29 Mar 2025 254th DialFrost 🇸🇬 0 78 3ms 10 May 2025 254th solisolu 0 78 20ms 10 Nov 2025 254th madex 🇩🇪 0 78 3ms 5 hours ago 258th BREMAUCY 🇫🇷 0 79 18ms 3 days ago 258th Andrey2001 0 79 18ms 2 days ago 258th edsrzf 🇳🇿 0 79 30ms 2 days ago 258th mishak-sys 0 79 411ms 23 hours ago 262nd Shanethegamer 🇺🇸 0 80 5ms 3 Jun 2025 262nd error256 0 80 466ms 16 Jan 2026 262nd stefangimmillaro 0 80 19ms 2 days ago 262nd albanian-laundromat 0 80 29ms 2 days ago 266th Shanethegamer 🇺🇸 0 81 348ms 3 Jun 2025 266th Lv0Sys 🇵🇱 0 81 437ms 23 hours ago 266th Aquateraneal 🇺🇸 0 81 19ms 13 hours ago 269th bricknellj 0 82 17ms 30 Jan 2025 269th scpchicken 🇵🇼 0 82 402ms 3 days ago 269th KatieLG 🇬🇧 0 82 18ms 3 days ago 269th MeWhenI 🇻🇦 0 82 105ms 38 hours ago 269th solisolu 0 82 4ms 24 hours ago 274th GolfingSuccess 🇬🇷 0 83 114ms 12 Jan 2026 274th GolfingSuccess 🇬🇷 0 83 386ms 12 Jan 2026 274th error256 0 83 430ms 12 Jan 2026 274th albanian-laundromat 0 83 9ms 26 Jan 2026 274th edsrzf 🇳🇿 0 83 473ms 2 days ago 274th edsrzf 🇳🇿 0 83 1,251ms 2 days ago 274th edsrzf 🇳🇿 0 83 106ms 27 hours ago 274th Steffan153 🇫🇮 0 83 416ms 21 hours ago 282nd Shanethegamer 🇺🇸 0 85 6ms 13 Dec 2024 282nd edsrzf 🇳🇿 0 85 1,065ms 25 May 2025 282nd albanian-laundromat 0 85 98ms 6 Dec 2025 282nd GolfingSuccess 🇬🇷 0 85 25ms 14 Jan 2026 282nd edsrzf 🇳🇿 0 85 28ms 2 days ago 287th kg583 🇺🇸 0 86 23ms 2 Oct 2025 287th GolfingSuccess 🇬🇷 0 86 2,109ms 18 days ago 289th sean-niemann 🇺🇸 0 87 42ms 9 May 2025 289th error256 0 87 2,931ms 14 Jan 2026 289th IanUtley 0 87 2,957ms 16 Jan 2026 289th CaedenHarper 🇨🇦 0 87 439ms 2 days ago 289th madex 🇩🇪 0 87 13ms 5 hours ago 294th muser-logiccpu 🇺🇦 0 88 72ms 2 Sep 2025 294th albanian-laundromat 0 88 1,372ms 5 Jan 2026 296th Shanethegamer 🇺🇸 0 89 107ms 13 Dec 2024 296th GolfingSuccess 🇬🇷 0 89 64ms 12 Jan 2026 298th sean-niemann 🇺🇸 0 90 7ms 10 May 2025 299th ovs-code 🇩🇪 0 91 261ms 13 Dec 2025 299th error256 0 91 62ms 12 Jan 2026 299th error256 0 91 293ms 14 Jan 2026 299th GolfingSuccess 🇬🇷 0 91 272ms 14 Jan 2026 299th Natanaelel 🇸🇪 0 91 333ms 2 days ago 299th Steffan153 🇫🇮 0 91 59ms 21 hours ago 305th Shanethegamer 🇺🇸 0 92 462ms 20 May 2025 305th Yax42 🇫🇷 0 92 68ms 2 days ago 305th edsrzf 🇳🇿 0 92 18ms 29 hours ago 308th Yax42 🇫🇷 0 93 392ms 2 days ago 309th Shanethegamer 🇺🇸 0 94 383ms 13 Dec 2024 309th edsrzf 🇳🇿 0 94 459ms 20 May 2025 309th MeWhenI 🇻🇦 0 94 396ms 41 hours ago 309th edsrzf 🇳🇿 0 94 6ms 35 hours ago 309th albanian-laundromat 0 94 6ms 35 hours ago 314th albanian-laundromat 0 95 114ms 6 Jan 2026 315th Shanethegamer 🇺🇸 0 96 427ms 3 Jun 2025 315th CaedenHarper 🇨🇦 0 96 416ms 2 days ago 315th edsrzf 🇳🇿 0 96 32ms 2 days ago 315th kumavale 0 96 160ms 33 hours ago 319th albanian-laundromat 0 97 44ms 6 Dec 2025 319th tomh1012 0 97 396ms 3 days ago First Prev 241–320 of 376 Next Last