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 319th albanian-laundromat 0 78 93ms 5 days ago 319th fuzzylojik-golf 🇺🇸 0 78 8ms 33 hours ago 319th edsrzf 🇳🇿 0 78 425ms 27 hours ago 324th sean-niemann 🇺🇸 0 80 455ms 8 May 2025 325th kumavale 0 81 156ms 26 Nov 2025 325th Matter1024 🇮🇳 0 81 45ms 14 Feb 2026 325th albanian-laundromat 0 81 45ms 5 days ago 325th fuzzylojik-golf 🇺🇸 0 81 9ms 34 hours ago 325th stefangimmillaro 0 81 46ms 21 hours ago 330th GolfingSuccess 🇬🇷 0 82 502ms 8 May 2025 330th emgordon154 0 82 159ms 14 Feb 2026 330th emgordon154 0 82 454ms 45 hours ago 330th edsrzf 🇳🇿 0 82 161ms 22 hours ago 334th Shanethegamer 🇺🇸 0 83 484ms 26 Nov 2024 334th Shanethegamer 🇺🇸 0 83 403ms 9 Jul 2025 334th fantaize 0 83 156ms 16 days ago 334th GolfingSuccess 🇬🇷 0 83 33ms 45 hours ago 334th MeWhenI 🇻🇦 0 83 229ms 36 hours ago 339th Shanethegamer 🇺🇸 0 84 416ms 26 Nov 2024 339th ovs-code 🇩🇪 0 84 12ms 10 May 2025 339th fuzzylojik-golf 🇺🇸 0 84 444ms 2 days ago 339th KasperKivimaeki 🇫🇮 0 84 12ms 30 hours ago 343rd edsrzf 🇳🇿 0 85 42ms 8 May 2025 343rd edsrzf 🇳🇿 0 85 18ms 9 May 2025 343rd error256 0 85 18ms 10 May 2025 343rd GolfingSuccess 🇬🇷 0 85 3ms 14 Jan 2026 343rd HumanoidCPU 0 85 434ms 22 hours ago 348th Shanethegamer 🇺🇸 0 86 147ms 17 Dec 2024 348th kg583 🇺🇸 0 86 39ms 16 Feb 2025 348th GolfingSuccess 🇬🇷 0 86 44ms 7 May 2025 348th GolfingSuccess 🇬🇷 0 86 2,577ms 8 May 2025 348th sean-niemann 🇺🇸 0 86 496ms 25 Sep 2025 348th MeWhenI 🇻🇦 0 86 381ms 21 Nov 2025 348th GolfingSuccess 🇬🇷 0 86 399ms 12 Jan 2026 348th elgan65536 🇺🇸 0 86 168ms 25 days ago 348th CaedenHarper 🇨🇦 0 86 399ms 4 days ago 348th CaedenHarper 🇨🇦 0 86 153ms 3 days ago 348th edsrzf 🇳🇿 0 86 414ms 44 hours ago 348th emgordon154 0 86 406ms 31 hours ago 348th GolfingSuccess 🇬🇷 0 86 19ms 23 hours ago 348th Steffan153 🇫🇮 0 86 390ms 8 hours ago 348th Steffan153 🇫🇮 0 86 19ms 6 hours ago 363rd Shanethegamer 🇺🇸 0 87 42ms 15 Apr 2025 363rd Shanethegamer 🇺🇸 0 87 20ms 8 May 2025 363rd albanian-laundromat 0 87 1,424ms 4 days ago 363rd Yax42 🇫🇷 0 87 2,430ms 2 days ago 363rd Steffan153 🇫🇮 0 87 180ms 7 hours ago 363rd Steffan153 🇫🇮 0 87 4ms 3 hours ago 369th kg583 🇺🇸 0 88 23ms 12 Feb 2026 369th fuzzylojik-golf 🇺🇸 0 88 152ms 2 days ago 371st Shanethegamer 🇺🇸 0 89 341ms 6 May 2025 371st Shanethegamer 🇺🇸 0 89 511ms 24 Sep 2025 371st DialFrost 🇸🇬 0 89 367ms 21 Nov 2025 371st CaedenHarper 🇨🇦 0 89 103ms 3 days ago 371st roelderickx 0 89 1,614ms 12 hours ago 371st madex 🇩🇪 0 89 172ms 75 mins ago 377th Yax42 🇫🇷 0 90 13ms 2 days ago 378th GolfingSuccess 🇬🇷 0 91 14ms 13 Dec 2025 379th namelessiw 0 92 504ms 10 Oct 2025 379th fuzzylojik-golf 🇺🇸 0 92 383ms 2 days ago 379th madex 🇩🇪 0 92 12ms 2 days ago 382nd edsrzf 🇳🇿 0 93 187ms 17 May 2025 382nd CaedenHarper 🇨🇦 0 93 13ms 5 days ago 384th DialFrost 🇸🇬 0 94 13ms 10 May 2025 384th edsrzf 🇳🇿 0 94 21ms 28 hours ago 386th Yax42 🇫🇷 0 95 389ms 2 days ago 387th GolfingSuccess 🇬🇷 0 96 182ms 7 May 2025 387th HumanoidCPU 0 96 160ms 47 hours ago 387th emgordon154 0 96 32ms 97 mins ago 390th Shanethegamer 🇺🇸 0 98 7ms 6 May 2025 391st snydej 0 99 43ms 22 Nov 2024 391st albanian-laundromat 0 99 343ms 5 days ago 391st dokutan 0 99 409ms 35 hours ago 394th dokutan 0 100 19ms 35 hours ago 394th ovs-code 🇩🇪 0 100 160ms 7 hours ago 396th HumanoidCPU 0 101 361ms 25 hours ago 396th HumanoidCPU 0 101 382ms 23 hours ago 398th sean-niemann 🇺🇸 0 102 286ms 8 May 2025 398th Shanethegamer 🇺🇸 0 102 307ms 8 May 2025 398th edsrzf 🇳🇿 0 102 295ms 9 May 2025 First Prev 321–400 of 453 Next Last