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 317th HumanoidCPU 0 85 434ms 5 hours ago 322nd Shanethegamer 🇺🇸 0 86 147ms 17 Dec 2024 322nd kg583 🇺🇸 0 86 39ms 16 Feb 2025 322nd GolfingSuccess 🇬🇷 0 86 44ms 7 May 2025 322nd GolfingSuccess 🇬🇷 0 86 2,577ms 8 May 2025 322nd sean-niemann 🇺🇸 0 86 496ms 25 Sep 2025 322nd MeWhenI 🇻🇦 0 86 381ms 21 Nov 2025 322nd GolfingSuccess 🇬🇷 0 86 399ms 12 Jan 2026 322nd elgan65536 🇺🇸 0 86 168ms 25 days ago 322nd CaedenHarper 🇨🇦 0 86 399ms 4 days ago 322nd CaedenHarper 🇨🇦 0 86 153ms 3 days ago 322nd edsrzf 🇳🇿 0 86 414ms 28 hours ago 322nd emgordon154 0 86 406ms 15 hours ago 322nd GolfingSuccess 🇬🇷 0 86 19ms 7 hours ago 335th Shanethegamer 🇺🇸 0 87 42ms 15 Apr 2025 335th Shanethegamer 🇺🇸 0 87 20ms 8 May 2025 335th albanian-laundromat 0 87 1,424ms 4 days ago 335th Yax42 🇫🇷 0 87 2,430ms 37 hours ago 339th kg583 🇺🇸 0 88 23ms 12 Feb 2026 339th fuzzylojik-golf 🇺🇸 0 88 152ms 2 days ago 341st Shanethegamer 🇺🇸 0 89 341ms 6 May 2025 341st Shanethegamer 🇺🇸 0 89 511ms 24 Sep 2025 341st DialFrost 🇸🇬 0 89 367ms 21 Nov 2025 341st CaedenHarper 🇨🇦 0 89 103ms 3 days ago 345th Yax42 🇫🇷 0 90 13ms 37 hours ago 346th GolfingSuccess 🇬🇷 0 91 14ms 13 Dec 2025 347th namelessiw 0 92 504ms 10 Oct 2025 347th fuzzylojik-golf 🇺🇸 0 92 383ms 2 days ago 347th madex 🇩🇪 0 92 12ms 32 hours ago 350th edsrzf 🇳🇿 0 93 187ms 17 May 2025 350th CaedenHarper 🇨🇦 0 93 13ms 4 days ago 352nd DialFrost 🇸🇬 0 94 13ms 10 May 2025 352nd edsrzf 🇳🇿 0 94 21ms 12 hours ago 354th Yax42 🇫🇷 0 95 389ms 37 hours ago 355th GolfingSuccess 🇬🇷 0 96 182ms 7 May 2025 355th HumanoidCPU 0 96 160ms 31 hours ago 357th Shanethegamer 🇺🇸 0 98 7ms 6 May 2025 358th snydej 0 99 43ms 22 Nov 2024 358th albanian-laundromat 0 99 343ms 4 days ago 358th dokutan 0 99 409ms 19 hours ago 361st dokutan 0 100 19ms 19 hours ago 362nd HumanoidCPU 0 101 361ms 9 hours ago 362nd HumanoidCPU 0 101 382ms 6 hours ago 364th sean-niemann 🇺🇸 0 102 286ms 8 May 2025 364th Shanethegamer 🇺🇸 0 102 307ms 8 May 2025 364th edsrzf 🇳🇿 0 102 295ms 9 May 2025 364th GolfingSuccess 🇬🇷 0 102 306ms 9 May 2025 364th ovs-code 🇩🇪 0 102 311ms 13 Dec 2025 364th kg583 🇺🇸 0 102 13ms 25 Jan 2026 364th CaedenHarper 🇨🇦 0 102 301ms 4 days ago 364th fuzzylojik-golf 🇺🇸 0 102 292ms 2 days ago 364th emgordon154 0 102 274ms 25 hours ago 373rd lukechampine 0 103 301ms 7 Jun 2025 373rd chris124567 0 103 294ms 8 Jun 2025 373rd albanian-laundromat 0 103 270ms 16 Dec 2025 373rd GolfingSuccess 🇬🇷 0 103 336ms 14 Jan 2026 373rd HumanoidCPU 0 103 329ms 6 hours ago 378th UnderKoen 🇳🇱 0 107 2,121ms 18 hours ago 379th edsrzf 🇳🇿 0 109 21ms 44 mins ago 380th GolfingSuccess 🇬🇷 0 111 107ms 5 hours ago 381st retrohun 0 112 16ms 41 hours ago 381st edsrzf 🇳🇿 0 112 27ms 2 hours ago 383rd edsrzf 🇳🇿 0 114 30ms 12 hours ago 384th prestosilver 🇺🇸 0 115 418ms 40 hours ago 384th HumanoidCPU 0 115 260ms 6 hours ago 386th emgordon154 0 116 66ms 2 hours ago 387th GolfingSuccess 🇬🇷 0 117 34ms 25 Dec 2025 388th HumanoidCPU 0 118 14ms 79 mins ago 389th emgordon154 0 119 56ms 26 hours ago 389th not-a-pokemon 0 119 15ms 15 hours ago 391st edsrzf 🇳🇿 0 127 58ms 21 hours ago 392nd saito-ta 🇯🇵 0 128 1,990ms 8 May 2025 393rd CaedenHarper 🇨🇦 0 129 446ms 4 days ago 394th Natanaelel 🇸🇪 0 130 360ms 2 May 2025 395th edsrzf 🇳🇿 0 134 22ms 5 hours ago 396th Shanethegamer 🇺🇸 0 136 315ms 26 Nov 2024 397th albanian-laundromat 0 137 27ms 4 days ago 398th GolfingSuccess 🇬🇷 0 138 336ms 8 May 2025 399th GolfingSuccess 🇬🇷 0 140 94ms 10 hours ago 400th canissimia 🇦🇶 0 143 15ms 25 hours ago First Prev 321–400 of 415 Next Last