The Gray Code Decoder and Gray Code Encoder holes will go live in approximately 3 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 238th addmai 0 77 20ms 24 Jul 2025 238th hiichbindermax 0 77 19ms 17 Aug 2025 238th 5cw 🇺🇸 0 77 18ms 22 Aug 2025 238th davecame 0 77 135ms 25 Sep 2025 238th SirBogman 🇺🇸 0 77 232ms 13 Oct 2025 238th jtaxen 0 77 19ms 16 Oct 2025 238th albanian-laundromat 0 77 412ms 6 Dec 2025 238th Matter1024 🇮🇳 0 77 17ms 12 Feb 2026 238th KasperKivimaeki 🇫🇮 0 77 564ms 12 days ago 238th StefanHabel 🇨🇦 0 77 1,217ms 4 days ago 238th ahmetdemirag 🇨🇾 0 77 18ms 3 days ago 238th tomh1012 0 77 17ms 3 days ago 238th qpwoeirut 0 77 20ms 3 days ago 238th btjones0 0 77 19ms 3 days ago 238th ComradeSquirrel 0 77 18ms 2 days ago 238th bzijlema 🇳🇱 0 77 18ms 2 days ago 238th Lv0Sys 🇵🇱 0 77 18ms 43 hours ago 258th jameswmccarty 0 78 20ms 29 Mar 2025 258th DialFrost 🇸🇬 0 78 3ms 10 May 2025 258th solisolu 0 78 20ms 10 Nov 2025 258th madex 🇩🇪 0 78 3ms 22 hours ago 262nd BREMAUCY 🇫🇷 0 79 18ms 3 days ago 262nd Andrey2001 0 79 18ms 3 days ago 262nd edsrzf 🇳🇿 0 79 30ms 2 days ago 262nd mishak-sys 0 79 411ms 40 hours ago 266th Shanethegamer 🇺🇸 0 80 5ms 3 Jun 2025 266th error256 0 80 466ms 16 Jan 2026 266th stefangimmillaro 0 80 19ms 3 days ago 266th albanian-laundromat 0 80 29ms 3 days ago 270th Shanethegamer 🇺🇸 0 81 348ms 3 Jun 2025 270th Lv0Sys 🇵🇱 0 81 437ms 40 hours ago 270th Aquateraneal 🇺🇸 0 81 19ms 30 hours ago 270th luuumine 🇫🇷 0 81 16ms 16 hours ago 270th acollett89 0 81 14ms 13 hours ago 275th bricknellj 0 82 17ms 30 Jan 2025 275th scpchicken 🇵🇼 0 82 402ms 4 days ago 275th KatieLG 🇬🇧 0 82 18ms 4 days ago 275th MeWhenI 🇻🇦 0 82 105ms 2 days ago 275th solisolu 0 82 4ms 42 hours ago 275th MeWhenI 🇻🇦 0 82 391ms 5 hours ago 281st GolfingSuccess 🇬🇷 0 83 114ms 12 Jan 2026 281st GolfingSuccess 🇬🇷 0 83 386ms 12 Jan 2026 281st error256 0 83 430ms 12 Jan 2026 281st albanian-laundromat 0 83 9ms 26 Jan 2026 281st edsrzf 🇳🇿 0 83 473ms 3 days ago 281st edsrzf 🇳🇿 0 83 1,251ms 2 days ago 281st edsrzf 🇳🇿 0 83 106ms 44 hours ago 281st Steffan153 🇫🇮 0 83 416ms 39 hours ago 281st msbranicky 0 83 18ms 13 hours ago 290th Shanethegamer 🇺🇸 0 85 6ms 13 Dec 2024 290th edsrzf 🇳🇿 0 85 1,065ms 25 May 2025 290th albanian-laundromat 0 85 98ms 6 Dec 2025 290th GolfingSuccess 🇬🇷 0 85 25ms 14 Jan 2026 290th edsrzf 🇳🇿 0 85 28ms 2 days ago 295th kg583 🇺🇸 0 86 23ms 2 Oct 2025 295th GolfingSuccess 🇬🇷 0 86 2,109ms 18 days ago 297th sean-niemann 🇺🇸 0 87 42ms 9 May 2025 297th error256 0 87 2,931ms 14 Jan 2026 297th IanUtley 0 87 2,957ms 16 Jan 2026 297th CaedenHarper 🇨🇦 0 87 439ms 3 days ago 297th madex 🇩🇪 0 87 13ms 22 hours ago 302nd muser-logiccpu 🇺🇦 0 88 72ms 2 Sep 2025 302nd albanian-laundromat 0 88 1,372ms 5 Jan 2026 304th Shanethegamer 🇺🇸 0 89 107ms 13 Dec 2024 304th GolfingSuccess 🇬🇷 0 89 64ms 12 Jan 2026 306th sean-niemann 🇺🇸 0 90 7ms 10 May 2025 307th ovs-code 🇩🇪 0 91 261ms 13 Dec 2025 307th error256 0 91 62ms 12 Jan 2026 307th error256 0 91 293ms 14 Jan 2026 307th GolfingSuccess 🇬🇷 0 91 272ms 14 Jan 2026 307th Natanaelel 🇸🇪 0 91 333ms 3 days ago 307th Steffan153 🇫🇮 0 91 59ms 39 hours ago 313th Shanethegamer 🇺🇸 0 92 462ms 20 May 2025 313th Yax42 🇫🇷 0 92 68ms 3 days ago 313th edsrzf 🇳🇿 0 92 18ms 46 hours ago 316th Yax42 🇫🇷 0 93 392ms 3 days ago 317th Shanethegamer 🇺🇸 0 94 383ms 13 Dec 2024 317th edsrzf 🇳🇿 0 94 459ms 20 May 2025 317th MeWhenI 🇻🇦 0 94 396ms 2 days ago 317th edsrzf 🇳🇿 0 94 6ms 2 days ago First Prev 241–320 of 385 Next Last