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 236th GolfingSuccess 🇬🇷 0 66 430ms 4 Feb 2026 236th albanian-laundromat 0 66 1,391ms 3 days ago 236th Yax42 🇫🇷 0 66 484ms 2 days ago 236th fuzzylojik-golf 🇺🇸 0 66 456ms 40 hours ago 236th edsrzf 🇳🇿 0 66 7ms 12 hours ago 246th GolfingSuccess 🇬🇷 0 67 12ms 8 May 2025 246th tomh1012 0 67 429ms 29 hours ago 248th Shanethegamer 🇺🇸 0 68 145ms 26 Nov 2024 248th sean-niemann 🇺🇸 0 68 131ms 8 May 2025 248th edsrzf 🇳🇿 0 68 113ms 25 May 2025 248th GolfingSuccess 🇬🇷 0 68 110ms 2 days ago 248th fuzzylojik-golf 🇺🇸 0 68 1,320ms 106 mins ago 253rd GolfingSuccess 🇬🇷 0 69 10ms 8 May 2025 253rd CaedenHarper 🇨🇦 0 69 486ms 2 days ago 255th JOrE20 0 70 41ms 13 Feb 2026 256th kg583 🇺🇸 0 71 27ms 1 Dec 2024 256th CLOStrophobic 🇮🇹 0 71 13ms 18 Jan 2025 256th GolfingSuccess 🇬🇷 0 71 14ms 7 May 2025 256th edsrzf 🇳🇿 0 71 14ms 8 May 2025 256th AlephSquirrel 0 71 13ms 9 May 2025 261st Shanethegamer 🇺🇸 0 72 27ms 9 Dec 2024 262nd GolfingSuccess 🇬🇷 0 73 16ms 8 May 2025 263rd not-a-pokemon 0 74 15ms 81 mins ago 264th Shanethegamer 🇺🇸 0 75 99ms 26 Nov 2024 264th sean-niemann 🇺🇸 0 75 103ms 8 May 2025 264th HumanoidCPU 0 75 112ms 5 hours ago 267th GolfingSuccess 🇬🇷 0 76 133ms 28 Nov 2025 267th fuzzylojik-golf 🇺🇸 0 76 99ms 40 hours ago 267th edsrzf 🇳🇿 0 76 131ms 31 hours ago 267th emgordon154 0 76 115ms 12 hours ago 271st rucin93 🇵🇱 0 77 130ms 8 May 2025 271st Shanethegamer 🇺🇸 0 77 146ms 12 Nov 2025 273rd saito-ta 🇯🇵 0 78 4ms 10 May 2025 273rd rhdqor213 0 78 4ms 10 May 2025 273rd albanian-laundromat 0 78 100ms 3 days ago 273rd fuzzylojik-golf 🇺🇸 0 78 8ms 2 hours ago 277th sean-niemann 🇺🇸 0 80 455ms 8 May 2025 278th kumavale 0 81 156ms 26 Nov 2025 278th Matter1024 🇮🇳 0 81 45ms 14 Feb 2026 278th albanian-laundromat 0 81 45ms 3 days ago 278th fuzzylojik-golf 🇺🇸 0 81 9ms 3 hours ago 282nd GolfingSuccess 🇬🇷 0 82 502ms 8 May 2025 282nd emgordon154 0 82 159ms 14 Feb 2026 282nd emgordon154 0 82 518ms 14 hours ago 285th Shanethegamer 🇺🇸 0 83 484ms 26 Nov 2024 285th edsrzf 🇳🇿 0 83 414ms 9 Jul 2025 285th Shanethegamer 🇺🇸 0 83 403ms 9 Jul 2025 285th fantaize 0 83 156ms 14 days ago 285th GolfingSuccess 🇬🇷 0 83 33ms 14 hours ago 285th MeWhenI 🇻🇦 0 83 229ms 5 hours ago 291st Shanethegamer 🇺🇸 0 84 416ms 26 Nov 2024 291st ovs-code 🇩🇪 0 84 12ms 10 May 2025 291st fuzzylojik-golf 🇺🇸 0 84 444ms 40 hours ago 294th edsrzf 🇳🇿 0 85 42ms 8 May 2025 294th edsrzf 🇳🇿 0 85 18ms 9 May 2025 294th error256 0 85 18ms 10 May 2025 294th GolfingSuccess 🇬🇷 0 85 3ms 14 Jan 2026 294th KasperKivimaeki 🇫🇮 0 85 12ms 10 hours ago 299th Shanethegamer 🇺🇸 0 86 147ms 17 Dec 2024 299th kg583 🇺🇸 0 86 39ms 16 Feb 2025 299th GolfingSuccess 🇬🇷 0 86 44ms 7 May 2025 299th GolfingSuccess 🇬🇷 0 86 2,577ms 8 May 2025 299th edsrzf 🇳🇿 0 86 155ms 9 May 2025 299th sean-niemann 🇺🇸 0 86 496ms 25 Sep 2025 299th GolfingSuccess 🇬🇷 0 86 8ms 12 Nov 2025 299th MeWhenI 🇻🇦 0 86 381ms 21 Nov 2025 299th GolfingSuccess 🇬🇷 0 86 399ms 12 Jan 2026 299th elgan65536 🇺🇸 0 86 168ms 24 days ago 299th CaedenHarper 🇨🇦 0 86 399ms 3 days ago 299th CaedenHarper 🇨🇦 0 86 153ms 2 days ago 299th edsrzf 🇳🇿 0 86 414ms 13 hours ago 299th edsrzf 🇳🇿 0 86 8ms 6 hours ago 299th emgordon154 0 86 406ms 42 mins ago 314th Shanethegamer 🇺🇸 0 87 42ms 15 Apr 2025 314th GolfingSuccess 🇬🇷 0 87 18ms 8 May 2025 314th Shanethegamer 🇺🇸 0 87 20ms 8 May 2025 314th albanian-laundromat 0 87 1,424ms 3 days ago 314th Yax42 🇫🇷 0 87 2,430ms 23 hours ago 319th GolfingSuccess 🇬🇷 0 88 5ms 12 Nov 2025 319th kg583 🇺🇸 0 88 23ms 12 Feb 2026 First Prev 241–320 of 385 Next Last