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 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 11 hours ago 325th GolfingSuccess 🇬🇷 0 76 133ms 28 Nov 2025 325th fuzzylojik-golf 🇺🇸 0 76 99ms 3 days ago 325th edsrzf 🇳🇿 0 76 131ms 3 days ago 325th emgordon154 0 76 115ms 2 days ago 329th rucin93 🇵🇱 0 77 130ms 8 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 25 hours ago 334th saito-ta 🇯🇵 0 78 4ms 10 May 2025 334th rhdqor213 0 78 4ms 10 May 2025 334th albanian-laundromat 0 78 98ms 5 days ago 334th fuzzylojik-golf 🇺🇸 0 78 8ms 2 days ago 334th edsrzf 🇳🇿 0 78 425ms 2 days ago 339th sean-niemann 🇺🇸 0 80 455ms 8 May 2025 340th kumavale 0 81 170ms 26 Nov 2025 340th Matter1024 🇮🇳 0 81 45ms 14 Feb 2026 340th albanian-laundromat 0 81 45ms 5 days ago 340th fuzzylojik-golf 🇺🇸 0 81 9ms 2 days ago 340th stefangimmillaro 0 81 44ms 42 hours ago 345th GolfingSuccess 🇬🇷 0 82 502ms 8 May 2025 345th emgordon154 0 82 170ms 14 Feb 2026 345th emgordon154 0 82 454ms 2 days ago 345th edsrzf 🇳🇿 0 82 167ms 44 hours ago 345th GolfingSuccess 🇬🇷 0 82 17ms 17 hours ago 350th Shanethegamer 🇺🇸 0 83 484ms 26 Nov 2024 350th Shanethegamer 🇺🇸 0 83 403ms 9 Jul 2025 350th fantaize 0 83 163ms 17 days ago 350th GolfingSuccess 🇬🇷 0 83 33ms 2 days ago 350th MeWhenI 🇻🇦 0 83 229ms 2 days ago 350th KrausRaus 🇺🇸 0 83 13ms 5 hours ago 356th Shanethegamer 🇺🇸 0 84 416ms 26 Nov 2024 356th ovs-code 🇩🇪 0 84 12ms 10 May 2025 356th fuzzylojik-golf 🇺🇸 0 84 444ms 3 days ago 356th KasperKivimaeki 🇫🇮 0 84 12ms 2 days ago 356th emgordon154 0 84 29ms 20 hours ago 356th dokutan 0 84 417ms 11 hours ago 362nd edsrzf 🇳🇿 0 85 42ms 8 May 2025 362nd edsrzf 🇳🇿 0 85 18ms 9 May 2025 362nd error256 0 85 18ms 10 May 2025 362nd GolfingSuccess 🇬🇷 0 85 3ms 14 Jan 2026 362nd HumanoidCPU 0 85 434ms 43 hours ago 362nd HumanoidCPU 0 85 419ms 20 hours ago 368th Shanethegamer 🇺🇸 0 86 158ms 17 Dec 2024 368th kg583 🇺🇸 0 86 39ms 16 Feb 2025 368th GolfingSuccess 🇬🇷 0 86 44ms 7 May 2025 368th GolfingSuccess 🇬🇷 0 86 2,577ms 8 May 2025 368th sean-niemann 🇺🇸 0 86 496ms 25 Sep 2025 368th MeWhenI 🇻🇦 0 86 381ms 21 Nov 2025 368th GolfingSuccess 🇬🇷 0 86 399ms 12 Jan 2026 368th elgan65536 🇺🇸 0 86 184ms 26 days ago 368th CaedenHarper 🇨🇦 0 86 399ms 5 days ago 368th CaedenHarper 🇨🇦 0 86 154ms 4 days ago 368th edsrzf 🇳🇿 0 86 414ms 2 days ago 368th emgordon154 0 86 406ms 2 days ago 368th GolfingSuccess 🇬🇷 0 86 19ms 45 hours ago 368th Steffan153 🇫🇮 0 86 390ms 30 hours ago 368th Steffan153 🇫🇮 0 86 19ms 28 hours ago 368th stefangimmillaro 0 86 154ms 14 hours ago 384th Shanethegamer 🇺🇸 0 87 42ms 15 Apr 2025 384th Shanethegamer 🇺🇸 0 87 20ms 8 May 2025 384th albanian-laundromat 0 87 1,424ms 5 days ago 384th Yax42 🇫🇷 0 87 2,340ms 3 days ago 384th Steffan153 🇫🇮 0 87 180ms 28 hours ago 384th Steffan153 🇫🇮 0 87 4ms 25 hours ago 384th roelderickx 0 87 1,609ms 10 hours ago 391st kg583 🇺🇸 0 88 23ms 12 Feb 2026 391st fuzzylojik-golf 🇺🇸 0 88 154ms 3 days ago 393rd Shanethegamer 🇺🇸 0 89 341ms 6 May 2025 393rd Shanethegamer 🇺🇸 0 89 511ms 24 Sep 2025 393rd DialFrost 🇸🇬 0 89 367ms 21 Nov 2025 393rd CaedenHarper 🇨🇦 0 89 103ms 4 days ago 393rd madex 🇩🇪 0 89 174ms 22 hours ago 393rd edsrzf 🇳🇿 0 89 334ms 13 hours ago 393rd Yax42 🇫🇷 0 89 13ms 12 hours ago 393rd dokutan 0 89 476ms 11 hours ago First Prev 321–400 of 482 Next Last