The Gray Code Decoder and Gray Code Encoder holes will go live in approximately 6 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 239th sean-niemann 🇺🇸 0 66 7ms 8 May 2025 239th AdrienHache 🇫🇷 0 66 421ms 2 Nov 2025 239th namelessiw 0 66 434ms 2 Nov 2025 239th GolfingSuccess 🇬🇷 0 66 430ms 4 Feb 2026 239th albanian-laundromat 0 66 1,391ms 3 days ago 239th Yax42 🇫🇷 0 66 484ms 2 days ago 239th fuzzylojik-golf 🇺🇸 0 66 456ms 43 hours ago 239th edsrzf 🇳🇿 0 66 7ms 15 hours ago 249th GolfingSuccess 🇬🇷 0 67 12ms 8 May 2025 249th tomh1012 0 67 429ms 32 hours ago 251st Shanethegamer 🇺🇸 0 68 145ms 26 Nov 2024 251st sean-niemann 🇺🇸 0 68 131ms 8 May 2025 251st edsrzf 🇳🇿 0 68 113ms 25 May 2025 251st GolfingSuccess 🇬🇷 0 68 110ms 2 days ago 251st fuzzylojik-golf 🇺🇸 0 68 1,320ms 4 hours ago 256th GolfingSuccess 🇬🇷 0 69 10ms 8 May 2025 256th CaedenHarper 🇨🇦 0 69 486ms 2 days ago 258th JOrE20 0 70 41ms 13 Feb 2026 259th kg583 🇺🇸 0 71 27ms 1 Dec 2024 259th CLOStrophobic 🇮🇹 0 71 13ms 18 Jan 2025 259th GolfingSuccess 🇬🇷 0 71 14ms 7 May 2025 259th edsrzf 🇳🇿 0 71 14ms 8 May 2025 259th AlephSquirrel 0 71 13ms 9 May 2025 264th Shanethegamer 🇺🇸 0 72 27ms 9 Dec 2024 265th GolfingSuccess 🇬🇷 0 73 16ms 8 May 2025 266th not-a-pokemon 0 74 15ms 3 hours ago 267th Shanethegamer 🇺🇸 0 75 99ms 26 Nov 2024 267th sean-niemann 🇺🇸 0 75 103ms 8 May 2025 267th HumanoidCPU 0 75 112ms 8 hours ago 270th GolfingSuccess 🇬🇷 0 76 133ms 28 Nov 2025 270th fuzzylojik-golf 🇺🇸 0 76 99ms 43 hours ago 270th edsrzf 🇳🇿 0 76 131ms 34 hours ago 270th emgordon154 0 76 115ms 15 hours ago 270th MeWhenI 🇻🇦 0 76 98ms 21 mins ago 275th rucin93 🇵🇱 0 77 130ms 8 May 2025 275th Shanethegamer 🇺🇸 0 77 146ms 12 Nov 2025 275th edsrzf 🇳🇿 0 77 7ms 29 mins ago 278th saito-ta 🇯🇵 0 78 4ms 10 May 2025 278th rhdqor213 0 78 4ms 10 May 2025 278th albanian-laundromat 0 78 100ms 3 days ago 278th fuzzylojik-golf 🇺🇸 0 78 8ms 5 hours ago 282nd sean-niemann 🇺🇸 0 80 455ms 8 May 2025 283rd kumavale 0 81 156ms 26 Nov 2025 283rd Matter1024 🇮🇳 0 81 45ms 14 Feb 2026 283rd albanian-laundromat 0 81 45ms 3 days ago 283rd fuzzylojik-golf 🇺🇸 0 81 9ms 5 hours ago 287th GolfingSuccess 🇬🇷 0 82 502ms 8 May 2025 287th emgordon154 0 82 159ms 14 Feb 2026 287th emgordon154 0 82 518ms 17 hours ago 290th Shanethegamer 🇺🇸 0 83 484ms 26 Nov 2024 290th edsrzf 🇳🇿 0 83 414ms 9 Jul 2025 290th Shanethegamer 🇺🇸 0 83 403ms 9 Jul 2025 290th fantaize 0 83 156ms 15 days ago 290th GolfingSuccess 🇬🇷 0 83 33ms 16 hours ago 290th MeWhenI 🇻🇦 0 83 229ms 7 hours ago 296th Shanethegamer 🇺🇸 0 84 416ms 26 Nov 2024 296th ovs-code 🇩🇪 0 84 12ms 10 May 2025 296th fuzzylojik-golf 🇺🇸 0 84 444ms 43 hours ago 296th KasperKivimaeki 🇫🇮 0 84 12ms 2 hours ago 300th edsrzf 🇳🇿 0 85 42ms 8 May 2025 300th edsrzf 🇳🇿 0 85 18ms 9 May 2025 300th error256 0 85 18ms 10 May 2025 300th GolfingSuccess 🇬🇷 0 85 3ms 14 Jan 2026 304th Shanethegamer 🇺🇸 0 86 147ms 17 Dec 2024 304th kg583 🇺🇸 0 86 39ms 16 Feb 2025 304th GolfingSuccess 🇬🇷 0 86 44ms 7 May 2025 304th GolfingSuccess 🇬🇷 0 86 2,577ms 8 May 2025 304th edsrzf 🇳🇿 0 86 155ms 9 May 2025 304th sean-niemann 🇺🇸 0 86 496ms 25 Sep 2025 304th GolfingSuccess 🇬🇷 0 86 8ms 12 Nov 2025 304th MeWhenI 🇻🇦 0 86 381ms 21 Nov 2025 304th GolfingSuccess 🇬🇷 0 86 399ms 12 Jan 2026 304th elgan65536 🇺🇸 0 86 168ms 24 days ago 304th CaedenHarper 🇨🇦 0 86 399ms 3 days ago 304th CaedenHarper 🇨🇦 0 86 153ms 2 days ago 304th edsrzf 🇳🇿 0 86 414ms 16 hours ago 304th emgordon154 0 86 406ms 3 hours ago 318th Shanethegamer 🇺🇸 0 87 42ms 15 Apr 2025 318th GolfingSuccess 🇬🇷 0 87 18ms 8 May 2025 318th Shanethegamer 🇺🇸 0 87 20ms 8 May 2025 First Prev 241–320 of 390 Next Last