The Gray Code Decoder and Gray Code Encoder holes will go live in approximately 7 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 241st GolfingSuccess 🇬🇷 0 76 133ms 28 Nov 2025 241st fuzzylojik-golf 🇺🇸 0 76 104ms 20 hours ago 241st edsrzf 🇳🇿 0 76 131ms 12 hours ago 244th rucin93 🇵🇱 0 77 130ms 8 May 2025 244th Shanethegamer 🇺🇸 0 77 146ms 12 Nov 2025 246th saito-ta 🇯🇵 0 78 4ms 10 May 2025 246th rhdqor213 0 78 4ms 10 May 2025 246th albanian-laundromat 0 78 100ms 2 days ago 249th sean-niemann 🇺🇸 0 80 455ms 8 May 2025 250th kumavale 0 81 156ms 26 Nov 2025 250th Matter1024 🇮🇳 0 81 45ms 14 Feb 2026 250th albanian-laundromat 0 81 46ms 2 days ago 253rd GolfingSuccess 🇬🇷 0 82 502ms 8 May 2025 253rd emgordon154 0 82 162ms 14 Feb 2026 255th Shanethegamer 🇺🇸 0 83 484ms 26 Nov 2024 255th edsrzf 🇳🇿 0 83 414ms 9 Jul 2025 255th Shanethegamer 🇺🇸 0 83 403ms 9 Jul 2025 255th fantaize 0 83 156ms 14 days ago 259th Shanethegamer 🇺🇸 0 84 416ms 26 Nov 2024 259th ovs-code 🇩🇪 0 84 12ms 10 May 2025 259th fuzzylojik-golf 🇺🇸 0 84 444ms 20 hours ago 262nd GolfingSuccess 🇬🇷 0 85 46ms 8 May 2025 262nd edsrzf 🇳🇿 0 85 42ms 8 May 2025 262nd edsrzf 🇳🇿 0 85 18ms 9 May 2025 262nd error256 0 85 18ms 10 May 2025 262nd GolfingSuccess 🇬🇷 0 85 3ms 14 Jan 2026 267th Shanethegamer 🇺🇸 0 86 147ms 17 Dec 2024 267th kg583 🇺🇸 0 86 39ms 16 Feb 2025 267th GolfingSuccess 🇬🇷 0 86 44ms 7 May 2025 267th GolfingSuccess 🇬🇷 0 86 2,431ms 8 May 2025 267th edsrzf 🇳🇿 0 86 155ms 9 May 2025 267th sean-niemann 🇺🇸 0 86 496ms 25 Sep 2025 267th GolfingSuccess 🇬🇷 0 86 8ms 12 Nov 2025 267th MeWhenI 🇻🇦 0 86 381ms 21 Nov 2025 267th GolfingSuccess 🇬🇷 0 86 399ms 12 Jan 2026 267th elgan65536 🇺🇸 0 86 168ms 23 days ago 267th CaedenHarper 🇨🇦 0 86 399ms 2 days ago 267th CaedenHarper 🇨🇦 0 86 153ms 44 hours ago 279th Shanethegamer 🇺🇸 0 87 42ms 15 Apr 2025 279th GolfingSuccess 🇬🇷 0 87 18ms 8 May 2025 279th Shanethegamer 🇺🇸 0 87 20ms 8 May 2025 279th albanian-laundromat 0 87 1,424ms 2 days ago 279th Yax42 🇫🇷 0 87 2,511ms 3 hours ago 284th GolfingSuccess 🇬🇷 0 88 6ms 12 Nov 2025 284th kg583 🇺🇸 0 88 23ms 12 Feb 2026 284th fuzzylojik-golf 🇺🇸 0 88 152ms 18 hours ago 287th Shanethegamer 🇺🇸 0 89 341ms 6 May 2025 287th Shanethegamer 🇺🇸 0 89 511ms 24 Sep 2025 287th DialFrost 🇸🇬 0 89 367ms 21 Nov 2025 287th CaedenHarper 🇨🇦 0 89 103ms 44 hours ago 291st Yax42 🇫🇷 0 90 13ms 3 hours ago 291st KasperKivimaeki 🇫🇮 0 90 13ms a min ago 293rd GolfingSuccess 🇬🇷 0 91 14ms 13 Dec 2025 294th namelessiw 0 92 504ms 10 Oct 2025 294th fuzzylojik-golf 🇺🇸 0 92 390ms 19 hours ago 296th edsrzf 🇳🇿 0 93 187ms 17 May 2025 296th CaedenHarper 🇨🇦 0 93 13ms 3 days ago 298th DialFrost 🇸🇬 0 94 13ms 10 May 2025 299th Yax42 🇫🇷 0 95 389ms 3 hours ago 300th GolfingSuccess 🇬🇷 0 96 182ms 7 May 2025 301st Shanethegamer 🇺🇸 0 98 7ms 6 May 2025 302nd snydej 0 99 43ms 22 Nov 2024 302nd albanian-laundromat 0 99 343ms 2 days ago 304th dokutan 0 100 370ms 3 hours ago 305th sean-niemann 🇺🇸 0 102 286ms 8 May 2025 305th Shanethegamer 🇺🇸 0 102 307ms 8 May 2025 305th edsrzf 🇳🇿 0 102 295ms 9 May 2025 305th GolfingSuccess 🇬🇷 0 102 306ms 9 May 2025 305th ovs-code 🇩🇪 0 102 311ms 13 Dec 2025 305th kg583 🇺🇸 0 102 13ms 25 Jan 2026 305th CaedenHarper 🇨🇦 0 102 301ms 3 days ago 305th fuzzylojik-golf 🇺🇸 0 102 292ms 20 hours ago 313th lukechampine 0 103 301ms 7 Jun 2025 313th chris124567 0 103 294ms 8 Jun 2025 313th albanian-laundromat 0 103 270ms 16 Dec 2025 313th GolfingSuccess 🇬🇷 0 103 336ms 14 Jan 2026 317th edsrzf 🇳🇿 0 104 17ms 3 hours ago 318th retrohun 0 112 16ms 7 hours ago 319th prestosilver 🇺🇸 0 115 418ms 5 hours ago 320th GolfingSuccess 🇬🇷 0 117 34ms 25 Dec 2025 First Prev 241–320 of 338 Next Last