The Gray Code Decoder and Gray Code Encoder holes will go live in approximately 5 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 emgordon154 0 82 454ms 38 hours ago 319th edsrzf 🇳🇿 0 82 161ms 15 hours ago 323rd Shanethegamer 🇺🇸 0 83 484ms 26 Nov 2024 323rd Shanethegamer 🇺🇸 0 83 403ms 9 Jul 2025 323rd fantaize 0 83 156ms 15 days ago 323rd GolfingSuccess 🇬🇷 0 83 33ms 37 hours ago 323rd MeWhenI 🇻🇦 0 83 229ms 28 hours ago 328th Shanethegamer 🇺🇸 0 84 416ms 26 Nov 2024 328th ovs-code 🇩🇪 0 84 12ms 10 May 2025 328th fuzzylojik-golf 🇺🇸 0 84 444ms 2 days ago 328th KasperKivimaeki 🇫🇮 0 84 12ms 23 hours ago 332nd edsrzf 🇳🇿 0 85 42ms 8 May 2025 332nd edsrzf 🇳🇿 0 85 18ms 9 May 2025 332nd error256 0 85 18ms 10 May 2025 332nd GolfingSuccess 🇬🇷 0 85 3ms 14 Jan 2026 332nd HumanoidCPU 0 85 434ms 14 hours ago 337th Shanethegamer 🇺🇸 0 86 147ms 17 Dec 2024 337th kg583 🇺🇸 0 86 39ms 16 Feb 2025 337th GolfingSuccess 🇬🇷 0 86 44ms 7 May 2025 337th GolfingSuccess 🇬🇷 0 86 2,577ms 8 May 2025 337th sean-niemann 🇺🇸 0 86 496ms 25 Sep 2025 337th MeWhenI 🇻🇦 0 86 381ms 21 Nov 2025 337th GolfingSuccess 🇬🇷 0 86 399ms 12 Jan 2026 337th elgan65536 🇺🇸 0 86 168ms 25 days ago 337th CaedenHarper 🇨🇦 0 86 399ms 4 days ago 337th CaedenHarper 🇨🇦 0 86 153ms 3 days ago 337th edsrzf 🇳🇿 0 86 414ms 37 hours ago 337th emgordon154 0 86 406ms 24 hours ago 337th GolfingSuccess 🇬🇷 0 86 19ms 16 hours ago 337th Steffan153 🇫🇮 0 86 390ms 88 mins ago 351st Shanethegamer 🇺🇸 0 87 42ms 15 Apr 2025 351st Shanethegamer 🇺🇸 0 87 20ms 8 May 2025 351st albanian-laundromat 0 87 1,424ms 4 days ago 351st Yax42 🇫🇷 0 87 2,430ms 46 hours ago 355th kg583 🇺🇸 0 88 23ms 12 Feb 2026 355th fuzzylojik-golf 🇺🇸 0 88 152ms 2 days ago 357th Shanethegamer 🇺🇸 0 89 341ms 6 May 2025 357th Shanethegamer 🇺🇸 0 89 511ms 24 Sep 2025 357th DialFrost 🇸🇬 0 89 367ms 21 Nov 2025 357th CaedenHarper 🇨🇦 0 89 103ms 3 days ago 357th roelderickx 0 89 1,614ms 5 hours ago 362nd Yax42 🇫🇷 0 90 13ms 46 hours ago 363rd GolfingSuccess 🇬🇷 0 91 14ms 13 Dec 2025 364th namelessiw 0 92 504ms 10 Oct 2025 364th fuzzylojik-golf 🇺🇸 0 92 383ms 2 days ago 364th madex 🇩🇪 0 92 12ms 41 hours ago 367th edsrzf 🇳🇿 0 93 187ms 17 May 2025 367th CaedenHarper 🇨🇦 0 93 13ms 4 days ago 369th DialFrost 🇸🇬 0 94 13ms 10 May 2025 369th edsrzf 🇳🇿 0 94 21ms 21 hours ago 371st Yax42 🇫🇷 0 95 389ms 46 hours ago 372nd GolfingSuccess 🇬🇷 0 96 182ms 7 May 2025 372nd HumanoidCPU 0 96 160ms 40 hours ago 374th Shanethegamer 🇺🇸 0 98 7ms 6 May 2025 375th snydej 0 99 43ms 22 Nov 2024 375th albanian-laundromat 0 99 343ms 4 days ago 375th dokutan 0 99 409ms 28 hours ago 378th dokutan 0 100 19ms 28 hours ago 378th ovs-code 🇩🇪 0 100 160ms 22 mins ago 380th HumanoidCPU 0 101 361ms 18 hours ago 380th HumanoidCPU 0 101 382ms 16 hours ago 382nd sean-niemann 🇺🇸 0 102 286ms 8 May 2025 382nd Shanethegamer 🇺🇸 0 102 307ms 8 May 2025 382nd edsrzf 🇳🇿 0 102 295ms 9 May 2025 382nd GolfingSuccess 🇬🇷 0 102 306ms 9 May 2025 382nd ovs-code 🇩🇪 0 102 311ms 13 Dec 2025 382nd kg583 🇺🇸 0 102 13ms 25 Jan 2026 382nd CaedenHarper 🇨🇦 0 102 301ms 4 days ago 382nd fuzzylojik-golf 🇺🇸 0 102 292ms 2 days ago 382nd emgordon154 0 102 274ms 34 hours ago 382nd edsrzf 🇳🇿 0 102 341ms 7 hours ago 382nd Steffan153 🇫🇮 0 102 338ms 10 mins ago 393rd lukechampine 0 103 301ms 7 Jun 2025 393rd chris124567 0 103 294ms 8 Jun 2025 393rd albanian-laundromat 0 103 270ms 16 Dec 2025 393rd GolfingSuccess 🇬🇷 0 103 336ms 14 Jan 2026 393rd HumanoidCPU 0 103 329ms 15 hours ago 398th UnderKoen 🇳🇱 0 107 2,121ms 27 hours ago 399th edsrzf 🇳🇿 0 109 21ms 9 hours ago 400th GolfingSuccess 🇬🇷 0 111 107ms 14 hours ago First Prev 321–400 of 436 Next Last