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 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 GolfingSuccess 🇬🇷 0 73 16ms 8 May 2025 321st GolfingSuccess 🇬🇷 0 73 8ms 3 days ago 323rd not-a-pokemon 0 74 15ms 3 days ago 324th Shanethegamer 🇺🇸 0 75 107ms 26 Nov 2024 324th sean-niemann 🇺🇸 0 75 106ms 8 May 2025 324th HumanoidCPU 0 75 110ms 3 days ago 324th MeWhenI 🇻🇦 0 75 102ms 36 hours ago 328th GolfingSuccess 🇬🇷 0 76 133ms 28 Nov 2025 328th fuzzylojik-golf 🇺🇸 0 76 99ms 4 days ago 328th edsrzf 🇳🇿 0 76 131ms 4 days ago 328th emgordon154 0 76 115ms 3 days ago 332nd rucin93 🇵🇱 0 77 130ms 8 May 2025 332nd Shanethegamer 🇺🇸 0 77 146ms 12 Nov 2025 332nd edsrzf 🇳🇿 0 77 7ms 3 days ago 332nd GolfingSuccess 🇬🇷 0 77 8ms 3 days ago 332nd Steffan153 🇫🇮 0 77 7ms 2 days ago 337th saito-ta 🇯🇵 0 78 4ms 10 May 2025 337th rhdqor213 0 78 4ms 10 May 2025 337th albanian-laundromat 0 78 98ms 6 days ago 337th fuzzylojik-golf 🇺🇸 0 78 8ms 3 days ago 337th edsrzf 🇳🇿 0 78 425ms 3 days ago 342nd madex 🇩🇪 0 79 110ms 2 hours ago 343rd sean-niemann 🇺🇸 0 80 455ms 8 May 2025 344th kumavale 0 81 170ms 26 Nov 2025 344th Matter1024 🇮🇳 0 81 45ms 14 Feb 2026 344th albanian-laundromat 0 81 45ms 6 days ago 344th fuzzylojik-golf 🇺🇸 0 81 9ms 3 days ago 344th stefangimmillaro 0 81 44ms 2 days ago 344th KasperKivimaeki 🇫🇮 0 81 5ms 24 hours ago 350th GolfingSuccess 🇬🇷 0 82 502ms 8 May 2025 350th emgordon154 0 82 170ms 14 Feb 2026 350th emgordon154 0 82 454ms 3 days ago 350th edsrzf 🇳🇿 0 82 167ms 2 days ago 350th GolfingSuccess 🇬🇷 0 82 17ms 42 hours ago 355th Shanethegamer 🇺🇸 0 83 484ms 26 Nov 2024 355th Shanethegamer 🇺🇸 0 83 403ms 9 Jul 2025 355th fantaize 0 83 163ms 18 days ago 355th GolfingSuccess 🇬🇷 0 83 33ms 3 days ago 355th MeWhenI 🇻🇦 0 83 229ms 3 days ago 355th KrausRaus 🇺🇸 0 83 13ms 29 hours ago 355th madex 🇩🇪 0 83 111ms 2 hours ago 362nd Shanethegamer 🇺🇸 0 84 416ms 26 Nov 2024 362nd ovs-code 🇩🇪 0 84 12ms 10 May 2025 362nd fuzzylojik-golf 🇺🇸 0 84 444ms 4 days ago 362nd emgordon154 0 84 28ms 45 hours ago 362nd dokutan 0 84 417ms 35 hours ago 367th edsrzf 🇳🇿 0 85 42ms 8 May 2025 367th edsrzf 🇳🇿 0 85 18ms 9 May 2025 367th error256 0 85 18ms 10 May 2025 367th GolfingSuccess 🇬🇷 0 85 3ms 14 Jan 2026 367th HumanoidCPU 0 85 434ms 2 days ago 367th HumanoidCPU 0 85 419ms 44 hours ago 367th madex 🇩🇪 0 85 72ms 3 hours ago 374th Shanethegamer 🇺🇸 0 86 158ms 17 Dec 2024 374th kg583 🇺🇸 0 86 39ms 16 Feb 2025 374th GolfingSuccess 🇬🇷 0 86 44ms 7 May 2025 374th GolfingSuccess 🇬🇷 0 86 2,577ms 8 May 2025 374th sean-niemann 🇺🇸 0 86 496ms 25 Sep 2025 374th MeWhenI 🇻🇦 0 86 381ms 21 Nov 2025 374th GolfingSuccess 🇬🇷 0 86 399ms 12 Jan 2026 374th elgan65536 🇺🇸 0 86 184ms 27 days ago 374th CaedenHarper 🇨🇦 0 86 399ms 6 days ago 374th CaedenHarper 🇨🇦 0 86 154ms 5 days ago 374th edsrzf 🇳🇿 0 86 414ms 3 days ago 374th emgordon154 0 86 406ms 3 days ago 374th GolfingSuccess 🇬🇷 0 86 19ms 2 days ago 374th Steffan153 🇫🇮 0 86 390ms 2 days ago 374th Steffan153 🇫🇮 0 86 19ms 2 days ago 374th stefangimmillaro 0 86 154ms 39 hours ago 374th dokutan 0 86 19ms 8 hours ago 391st Shanethegamer 🇺🇸 0 87 42ms 15 Apr 2025 391st Shanethegamer 🇺🇸 0 87 20ms 8 May 2025 391st albanian-laundromat 0 87 1,424ms 6 days ago 391st Yax42 🇫🇷 0 87 2,340ms 4 days ago 391st Steffan153 🇫🇮 0 87 180ms 2 days ago 391st Steffan153 🇫🇮 0 87 4ms 2 days ago 391st roelderickx 0 87 1,609ms 35 hours ago 398th kg583 🇺🇸 0 88 23ms 12 Feb 2026 398th fuzzylojik-golf 🇺🇸 0 88 154ms 4 days ago 400th Shanethegamer 🇺🇸 0 89 341ms 6 May 2025 First Prev 321–400 of 497 Next Last