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 320th sean-niemann 🇺🇸 0 75 106ms 8 May 2025 320th HumanoidCPU 0 75 110ms 2 days ago 320th MeWhenI 🇻🇦 0 75 102ms 10 hours ago 324th GolfingSuccess 🇬🇷 0 76 133ms 28 Nov 2025 324th fuzzylojik-golf 🇺🇸 0 76 99ms 3 days ago 324th edsrzf 🇳🇿 0 76 131ms 3 days ago 324th emgordon154 0 76 115ms 2 days ago 328th rucin93 🇵🇱 0 77 130ms 8 May 2025 328th Shanethegamer 🇺🇸 0 77 146ms 12 Nov 2025 328th edsrzf 🇳🇿 0 77 7ms 2 days ago 328th GolfingSuccess 🇬🇷 0 77 8ms 47 hours ago 328th Steffan153 🇫🇮 0 77 7ms 23 hours ago 333rd saito-ta 🇯🇵 0 78 4ms 10 May 2025 333rd rhdqor213 0 78 4ms 10 May 2025 333rd albanian-laundromat 0 78 98ms 5 days ago 333rd fuzzylojik-golf 🇺🇸 0 78 8ms 2 days ago 333rd edsrzf 🇳🇿 0 78 425ms 47 hours ago 338th sean-niemann 🇺🇸 0 80 455ms 8 May 2025 339th kumavale 0 81 170ms 26 Nov 2025 339th Matter1024 🇮🇳 0 81 45ms 14 Feb 2026 339th albanian-laundromat 0 81 45ms 5 days ago 339th fuzzylojik-golf 🇺🇸 0 81 9ms 2 days ago 339th stefangimmillaro 0 81 44ms 41 hours ago 344th GolfingSuccess 🇬🇷 0 82 502ms 8 May 2025 344th emgordon154 0 82 170ms 14 Feb 2026 344th emgordon154 0 82 454ms 2 days ago 344th edsrzf 🇳🇿 0 82 167ms 42 hours ago 344th GolfingSuccess 🇬🇷 0 82 17ms 16 hours ago 349th Shanethegamer 🇺🇸 0 83 484ms 26 Nov 2024 349th Shanethegamer 🇺🇸 0 83 403ms 9 Jul 2025 349th fantaize 0 83 163ms 17 days ago 349th GolfingSuccess 🇬🇷 0 83 33ms 2 days ago 349th MeWhenI 🇻🇦 0 83 229ms 2 days ago 349th KrausRaus 🇺🇸 0 83 13ms 3 hours ago 355th Shanethegamer 🇺🇸 0 84 416ms 26 Nov 2024 355th ovs-code 🇩🇪 0 84 12ms 10 May 2025 355th fuzzylojik-golf 🇺🇸 0 84 444ms 3 days ago 355th KasperKivimaeki 🇫🇮 0 84 12ms 2 days ago 355th emgordon154 0 84 29ms 19 hours ago 355th dokutan 0 84 417ms 9 hours ago 361st edsrzf 🇳🇿 0 85 42ms 8 May 2025 361st edsrzf 🇳🇿 0 85 18ms 9 May 2025 361st error256 0 85 18ms 10 May 2025 361st GolfingSuccess 🇬🇷 0 85 3ms 14 Jan 2026 361st HumanoidCPU 0 85 434ms 42 hours ago 361st HumanoidCPU 0 85 419ms 19 hours ago 367th Shanethegamer 🇺🇸 0 86 158ms 17 Dec 2024 367th kg583 🇺🇸 0 86 39ms 16 Feb 2025 367th GolfingSuccess 🇬🇷 0 86 44ms 7 May 2025 367th GolfingSuccess 🇬🇷 0 86 2,577ms 8 May 2025 367th sean-niemann 🇺🇸 0 86 496ms 25 Sep 2025 367th MeWhenI 🇻🇦 0 86 381ms 21 Nov 2025 367th GolfingSuccess 🇬🇷 0 86 399ms 12 Jan 2026 367th elgan65536 🇺🇸 0 86 184ms 26 days ago 367th CaedenHarper 🇨🇦 0 86 399ms 5 days ago 367th CaedenHarper 🇨🇦 0 86 154ms 4 days ago 367th edsrzf 🇳🇿 0 86 414ms 2 days ago 367th emgordon154 0 86 406ms 2 days ago 367th GolfingSuccess 🇬🇷 0 86 19ms 44 hours ago 367th Steffan153 🇫🇮 0 86 390ms 28 hours ago 367th Steffan153 🇫🇮 0 86 19ms 26 hours ago 367th stefangimmillaro 0 86 154ms 13 hours ago 383rd Shanethegamer 🇺🇸 0 87 42ms 15 Apr 2025 383rd Shanethegamer 🇺🇸 0 87 20ms 8 May 2025 383rd albanian-laundromat 0 87 1,424ms 5 days ago 383rd Yax42 🇫🇷 0 87 2,340ms 3 days ago 383rd Steffan153 🇫🇮 0 87 180ms 27 hours ago 383rd Steffan153 🇫🇮 0 87 4ms 23 hours ago 383rd roelderickx 0 87 1,609ms 9 hours ago 390th kg583 🇺🇸 0 88 23ms 12 Feb 2026 390th fuzzylojik-golf 🇺🇸 0 88 154ms 3 days ago 392nd Shanethegamer 🇺🇸 0 89 341ms 6 May 2025 392nd Shanethegamer 🇺🇸 0 89 511ms 24 Sep 2025 392nd DialFrost 🇸🇬 0 89 367ms 21 Nov 2025 392nd CaedenHarper 🇨🇦 0 89 103ms 4 days ago 392nd madex 🇩🇪 0 89 174ms 21 hours ago 392nd edsrzf 🇳🇿 0 89 334ms 12 hours ago 392nd Yax42 🇫🇷 0 89 13ms 10 hours ago 392nd dokutan 0 89 476ms 9 hours ago 400th namelessiw 0 92 504ms 10 Oct 2025 First Prev 321–400 of 481 Next Last