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 240th CLOStrophobic 🇮🇹 0 71 13ms 18 Jan 2025 240th GolfingSuccess 🇬🇷 0 71 14ms 7 May 2025 240th edsrzf 🇳🇿 0 71 14ms 8 May 2025 240th AlephSquirrel 0 71 13ms 9 May 2025 245th Shanethegamer 🇺🇸 0 72 27ms 9 Dec 2024 246th GolfingSuccess 🇬🇷 0 73 16ms 8 May 2025 247th Shanethegamer 🇺🇸 0 75 99ms 26 Nov 2024 247th sean-niemann 🇺🇸 0 75 103ms 8 May 2025 249th GolfingSuccess 🇬🇷 0 76 133ms 28 Nov 2025 249th fuzzylojik-golf 🇺🇸 0 76 104ms 27 hours ago 249th edsrzf 🇳🇿 0 76 131ms 18 hours ago 252nd rucin93 🇵🇱 0 77 130ms 8 May 2025 252nd Shanethegamer 🇺🇸 0 77 146ms 12 Nov 2025 254th saito-ta 🇯🇵 0 78 4ms 10 May 2025 254th rhdqor213 0 78 4ms 10 May 2025 254th albanian-laundromat 0 78 100ms 3 days ago 257th sean-niemann 🇺🇸 0 80 455ms 8 May 2025 258th kumavale 0 81 156ms 26 Nov 2025 258th Matter1024 🇮🇳 0 81 45ms 14 Feb 2026 258th albanian-laundromat 0 81 45ms 3 days ago 261st GolfingSuccess 🇬🇷 0 82 502ms 8 May 2025 261st emgordon154 0 82 162ms 14 Feb 2026 261st emgordon154 0 82 518ms 96 mins ago 264th Shanethegamer 🇺🇸 0 83 484ms 26 Nov 2024 264th edsrzf 🇳🇿 0 83 414ms 9 Jul 2025 264th Shanethegamer 🇺🇸 0 83 403ms 9 Jul 2025 264th fantaize 0 83 156ms 14 days ago 264th GolfingSuccess 🇬🇷 0 83 33ms 78 mins ago 269th Shanethegamer 🇺🇸 0 84 416ms 26 Nov 2024 269th ovs-code 🇩🇪 0 84 12ms 10 May 2025 269th fuzzylojik-golf 🇺🇸 0 84 444ms 27 hours ago 269th MeWhenI 🇻🇦 0 84 215ms 2 hours ago 273rd edsrzf 🇳🇿 0 85 42ms 8 May 2025 273rd edsrzf 🇳🇿 0 85 18ms 9 May 2025 273rd error256 0 85 18ms 10 May 2025 273rd GolfingSuccess 🇬🇷 0 85 3ms 14 Jan 2026 277th Shanethegamer 🇺🇸 0 86 147ms 17 Dec 2024 277th kg583 🇺🇸 0 86 39ms 16 Feb 2025 277th GolfingSuccess 🇬🇷 0 86 44ms 7 May 2025 277th GolfingSuccess 🇬🇷 0 86 2,577ms 8 May 2025 277th edsrzf 🇳🇿 0 86 155ms 9 May 2025 277th sean-niemann 🇺🇸 0 86 496ms 25 Sep 2025 277th GolfingSuccess 🇬🇷 0 86 8ms 12 Nov 2025 277th MeWhenI 🇻🇦 0 86 381ms 21 Nov 2025 277th GolfingSuccess 🇬🇷 0 86 399ms 12 Jan 2026 277th elgan65536 🇺🇸 0 86 168ms 23 days ago 277th CaedenHarper 🇨🇦 0 86 399ms 3 days ago 277th CaedenHarper 🇨🇦 0 86 153ms 2 days ago 277th KasperKivimaeki 🇫🇮 0 86 12ms 6 hours ago 277th edsrzf 🇳🇿 0 86 414ms 65 mins ago 291st Shanethegamer 🇺🇸 0 87 42ms 15 Apr 2025 291st GolfingSuccess 🇬🇷 0 87 18ms 8 May 2025 291st Shanethegamer 🇺🇸 0 87 20ms 8 May 2025 291st albanian-laundromat 0 87 1,424ms 3 days ago 291st Yax42 🇫🇷 0 87 2,430ms 10 hours ago 296th GolfingSuccess 🇬🇷 0 88 5ms 12 Nov 2025 296th kg583 🇺🇸 0 88 23ms 12 Feb 2026 296th fuzzylojik-golf 🇺🇸 0 88 152ms 25 hours ago 299th Shanethegamer 🇺🇸 0 89 341ms 6 May 2025 299th Shanethegamer 🇺🇸 0 89 511ms 24 Sep 2025 299th DialFrost 🇸🇬 0 89 367ms 21 Nov 2025 299th CaedenHarper 🇨🇦 0 89 103ms 2 days ago 299th emgordon154 0 89 551ms 111 mins ago 304th Yax42 🇫🇷 0 90 13ms 10 hours ago 305th GolfingSuccess 🇬🇷 0 91 14ms 13 Dec 2025 306th namelessiw 0 92 504ms 10 Oct 2025 306th fuzzylojik-golf 🇺🇸 0 92 390ms 26 hours ago 306th madex 🇩🇪 0 92 12ms 5 hours ago 309th edsrzf 🇳🇿 0 93 187ms 17 May 2025 309th CaedenHarper 🇨🇦 0 93 13ms 3 days ago 311th DialFrost 🇸🇬 0 94 13ms 10 May 2025 312th Yax42 🇫🇷 0 95 389ms 10 hours ago 313th GolfingSuccess 🇬🇷 0 96 182ms 7 May 2025 313th HumanoidCPU 0 96 160ms 3 hours ago 315th Shanethegamer 🇺🇸 0 98 7ms 6 May 2025 316th snydej 0 99 43ms 22 Nov 2024 316th albanian-laundromat 0 99 343ms 3 days ago 318th dokutan 0 100 370ms 9 hours ago 319th sean-niemann 🇺🇸 0 102 286ms 8 May 2025 319th Shanethegamer 🇺🇸 0 102 307ms 8 May 2025 First Prev 241–320 of 354 Next Last