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 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 321st Shanethegamer 🇺🇸 0 75 107ms 26 Nov 2024 321st sean-niemann 🇺🇸 0 75 106ms 8 May 2025 321st HumanoidCPU 0 75 110ms 2 days ago 321st MeWhenI 🇻🇦 0 75 102ms 21 hours ago 325th GolfingSuccess 🇬🇷 0 76 133ms 28 Nov 2025 325th fuzzylojik-golf 🇺🇸 0 76 99ms 4 days ago 325th edsrzf 🇳🇿 0 76 131ms 3 days ago 325th emgordon154 0 76 115ms 3 days ago 329th rucin93 🇵🇱 0 77 130ms 8 May 2025 329th ovs-code 🇩🇪 0 77 81ms 30 May 2025 329th Shanethegamer 🇺🇸 0 77 146ms 12 Nov 2025 329th edsrzf 🇳🇿 0 77 7ms 2 days ago 329th GolfingSuccess 🇬🇷 0 77 8ms 2 days ago 329th Steffan153 🇫🇮 0 77 7ms 34 hours ago 335th saito-ta 🇯🇵 0 78 4ms 10 May 2025 335th rhdqor213 0 78 4ms 10 May 2025 335th albanian-laundromat 0 78 98ms 6 days ago 335th fuzzylojik-golf 🇺🇸 0 78 8ms 2 days ago 335th edsrzf 🇳🇿 0 78 425ms 2 days ago 340th GolfingSuccess 🇬🇷 0 79 79ms 14 May 2025 341st sean-niemann 🇺🇸 0 80 455ms 8 May 2025 342nd kumavale 0 81 170ms 26 Nov 2025 342nd Matter1024 🇮🇳 0 81 45ms 14 Feb 2026 342nd albanian-laundromat 0 81 45ms 6 days ago 342nd fuzzylojik-golf 🇺🇸 0 81 9ms 2 days ago 342nd stefangimmillaro 0 81 44ms 2 days ago 342nd KasperKivimaeki 🇫🇮 0 81 6ms 9 hours ago 348th GolfingSuccess 🇬🇷 0 82 502ms 8 May 2025 348th emgordon154 0 82 170ms 14 Feb 2026 348th emgordon154 0 82 454ms 3 days ago 348th edsrzf 🇳🇿 0 82 167ms 2 days ago 348th GolfingSuccess 🇬🇷 0 82 17ms 27 hours ago 353rd Shanethegamer 🇺🇸 0 83 484ms 26 Nov 2024 353rd Shanethegamer 🇺🇸 0 83 403ms 9 Jul 2025 353rd fantaize 0 83 163ms 17 days ago 353rd GolfingSuccess 🇬🇷 0 83 33ms 3 days ago 353rd MeWhenI 🇻🇦 0 83 229ms 2 days ago 353rd KrausRaus 🇺🇸 0 83 13ms 14 hours ago 359th Shanethegamer 🇺🇸 0 84 416ms 26 Nov 2024 359th ovs-code 🇩🇪 0 84 12ms 10 May 2025 359th fuzzylojik-golf 🇺🇸 0 84 444ms 4 days ago 359th emgordon154 0 84 29ms 30 hours ago 359th dokutan 0 84 417ms 20 hours ago 364th edsrzf 🇳🇿 0 85 42ms 8 May 2025 364th edsrzf 🇳🇿 0 85 17ms 9 May 2025 364th error256 0 85 18ms 10 May 2025 364th GolfingSuccess 🇬🇷 0 85 3ms 14 Jan 2026 364th HumanoidCPU 0 85 434ms 2 days ago 364th HumanoidCPU 0 85 419ms 29 hours ago 370th Shanethegamer 🇺🇸 0 86 158ms 17 Dec 2024 370th kg583 🇺🇸 0 86 39ms 16 Feb 2025 370th GolfingSuccess 🇬🇷 0 86 44ms 7 May 2025 370th GolfingSuccess 🇬🇷 0 86 2,577ms 8 May 2025 370th sean-niemann 🇺🇸 0 86 496ms 25 Sep 2025 370th MeWhenI 🇻🇦 0 86 381ms 21 Nov 2025 370th GolfingSuccess 🇬🇷 0 86 399ms 12 Jan 2026 370th elgan65536 🇺🇸 0 86 184ms 26 days ago 370th CaedenHarper 🇨🇦 0 86 399ms 6 days ago 370th CaedenHarper 🇨🇦 0 86 154ms 5 days ago 370th edsrzf 🇳🇿 0 86 414ms 3 days ago 370th emgordon154 0 86 406ms 2 days ago 370th GolfingSuccess 🇬🇷 0 86 19ms 2 days ago 370th Steffan153 🇫🇮 0 86 390ms 39 hours ago 370th Steffan153 🇫🇮 0 86 19ms 37 hours ago 370th stefangimmillaro 0 86 154ms 24 hours ago 386th Shanethegamer 🇺🇸 0 87 42ms 15 Apr 2025 386th Shanethegamer 🇺🇸 0 87 20ms 8 May 2025 386th albanian-laundromat 0 87 1,424ms 6 days ago 386th Yax42 🇫🇷 0 87 2,340ms 3 days ago 386th Steffan153 🇫🇮 0 87 180ms 38 hours ago 386th Steffan153 🇫🇮 0 87 4ms 34 hours ago 386th roelderickx 0 87 1,609ms 20 hours ago 393rd kg583 🇺🇸 0 88 23ms 12 Feb 2026 393rd fuzzylojik-golf 🇺🇸 0 88 154ms 4 days ago 395th Shanethegamer 🇺🇸 0 89 341ms 6 May 2025 395th Shanethegamer 🇺🇸 0 89 511ms 24 Sep 2025 395th DialFrost 🇸🇬 0 89 367ms 21 Nov 2025 395th CaedenHarper 🇨🇦 0 89 103ms 5 days ago 395th madex 🇩🇪 0 89 174ms 32 hours ago 395th edsrzf 🇳🇿 0 89 334ms 23 hours ago First Prev 321–400 of 484 Next Last