The Gray Code Decoder and Gray Code Encoder holes will go live in approximately 5 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 312th CaedenHarper 🇨🇦 0 86 153ms 3 days ago 312th edsrzf 🇳🇿 0 86 414ms 22 hours ago 312th emgordon154 0 86 406ms 9 hours ago 312th GolfingSuccess 🇬🇷 0 86 19ms 96 mins ago 325th Shanethegamer 🇺🇸 0 87 42ms 15 Apr 2025 325th Shanethegamer 🇺🇸 0 87 20ms 8 May 2025 325th albanian-laundromat 0 87 1,424ms 3 days ago 325th Yax42 🇫🇷 0 87 2,430ms 31 hours ago 329th kg583 🇺🇸 0 88 23ms 12 Feb 2026 329th fuzzylojik-golf 🇺🇸 0 88 152ms 46 hours ago 331st Shanethegamer 🇺🇸 0 89 341ms 6 May 2025 331st Shanethegamer 🇺🇸 0 89 511ms 24 Sep 2025 331st DialFrost 🇸🇬 0 89 367ms 21 Nov 2025 331st CaedenHarper 🇨🇦 0 89 103ms 3 days ago 335th Yax42 🇫🇷 0 90 13ms 31 hours ago 336th GolfingSuccess 🇬🇷 0 91 14ms 13 Dec 2025 337th namelessiw 0 92 504ms 10 Oct 2025 337th fuzzylojik-golf 🇺🇸 0 92 383ms 47 hours ago 337th madex 🇩🇪 0 92 12ms 26 hours ago 340th edsrzf 🇳🇿 0 93 187ms 17 May 2025 340th CaedenHarper 🇨🇦 0 93 13ms 4 days ago 342nd DialFrost 🇸🇬 0 94 13ms 10 May 2025 342nd edsrzf 🇳🇿 0 94 21ms 6 hours ago 344th Yax42 🇫🇷 0 95 389ms 31 hours ago 345th GolfingSuccess 🇬🇷 0 96 182ms 7 May 2025 345th HumanoidCPU 0 96 160ms 25 hours ago 347th Shanethegamer 🇺🇸 0 98 7ms 6 May 2025 348th snydej 0 99 43ms 22 Nov 2024 348th albanian-laundromat 0 99 343ms 4 days ago 348th dokutan 0 99 409ms 13 hours ago 351st dokutan 0 100 19ms 13 hours ago 352nd HumanoidCPU 0 101 361ms 3 hours ago 352nd HumanoidCPU 0 101 382ms 62 mins ago 354th sean-niemann 🇺🇸 0 102 286ms 8 May 2025 354th Shanethegamer 🇺🇸 0 102 307ms 8 May 2025 354th edsrzf 🇳🇿 0 102 295ms 9 May 2025 354th GolfingSuccess 🇬🇷 0 102 306ms 9 May 2025 354th ovs-code 🇩🇪 0 102 311ms 13 Dec 2025 354th kg583 🇺🇸 0 102 13ms 25 Jan 2026 354th CaedenHarper 🇨🇦 0 102 301ms 4 days ago 354th fuzzylojik-golf 🇺🇸 0 102 292ms 2 days ago 354th emgordon154 0 102 274ms 19 hours ago 363rd lukechampine 0 103 301ms 7 Jun 2025 363rd chris124567 0 103 294ms 8 Jun 2025 363rd albanian-laundromat 0 103 270ms 16 Dec 2025 363rd GolfingSuccess 🇬🇷 0 103 336ms 14 Jan 2026 363rd HumanoidCPU 0 103 329ms 40 mins ago 368th UnderKoen 🇳🇱 0 107 2,121ms 12 hours ago 369th retrohun 0 112 16ms 35 hours ago 370th edsrzf 🇳🇿 0 114 30ms 6 hours ago 371st prestosilver 🇺🇸 0 115 418ms 34 hours ago 371st HumanoidCPU 0 115 260ms 25 mins ago 373rd HumanoidCPU 0 116 457ms a min ago 374th GolfingSuccess 🇬🇷 0 117 34ms 25 Dec 2025 375th GolfingSuccess 🇬🇷 0 118 94ms 19 hours ago 376th emgordon154 0 119 56ms 20 hours ago 376th not-a-pokemon 0 119 15ms 10 hours ago 378th edsrzf 🇳🇿 0 127 58ms 15 hours ago 379th saito-ta 🇯🇵 0 128 1,990ms 8 May 2025 380th CaedenHarper 🇨🇦 0 129 446ms 4 days ago 381st Natanaelel 🇸🇪 0 130 360ms 2 May 2025 382nd Shanethegamer 🇺🇸 0 136 315ms 26 Nov 2024 383rd albanian-laundromat 0 137 27ms 3 days ago 384th GolfingSuccess 🇬🇷 0 138 336ms 8 May 2025 385th GolfingSuccess 🇬🇷 0 140 94ms 4 hours ago 385th edsrzf 🇳🇿 0 140 29ms 50 mins ago 387th canissimia 🇦🇶 0 143 15ms 19 hours ago 388th emgordon154 0 148 68ms 3 hours ago 389th emgordon154 0 150 15ms 9 May 2025 389th albanian-laundromat 0 150 28ms 3 days ago 391st kasarino 0 157 12ms 7 hours ago 392nd JOrE20 0 159 69ms 14 Feb 2026 393rd emgordon154 0 166 1,766ms 3 hours ago 394th RYSF13 🇨🇳 0 168 13ms 25 Jun 2025 395th Shanethegamer 🇺🇸 0 197 1,442ms 1 Feb 2025 396th emgordon154 0 199 1,441ms 3 hours ago 397th voytxt 🇨🇿 0 200 1,425ms 6 Feb 2026 397th GolfingSuccess 🇬🇷 0 200 1,407ms 22 hours ago 399th albanian-laundromat 0 235 112ms 35 mins ago 400th ovs-code 🇩🇪 0 237 107ms 3 hours ago First Prev 321–400 of 403 Next Last