The Gray Code Decoder and Gray Code Encoder holes will go live in approximately 3 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 400th Shanethegamer 🇺🇸 0 89 511ms 24 Sep 2025 400th DialFrost 🇸🇬 0 89 367ms 21 Nov 2025 400th CaedenHarper 🇨🇦 0 89 103ms 5 days ago 400th madex 🇩🇪 0 89 174ms 45 hours ago 400th edsrzf 🇳🇿 0 89 334ms 36 hours ago 400th Yax42 🇫🇷 0 89 13ms 35 hours ago 400th dokutan 0 89 476ms 34 hours ago 408th namelessiw 0 92 504ms 10 Oct 2025 408th fuzzylojik-golf 🇺🇸 0 92 383ms 4 days ago 408th madex 🇩🇪 0 92 12ms 3 days ago 411th edsrzf 🇳🇿 0 93 187ms 17 May 2025 411th CaedenHarper 🇨🇦 0 93 13ms 7 days ago 411th DialFrost 🇸🇬 0 93 13ms 25 hours ago 414th edsrzf 🇳🇿 0 94 21ms 3 days ago 415th Yax42 🇫🇷 0 95 389ms 4 days ago 416th GolfingSuccess 🇬🇷 0 96 182ms 7 May 2025 416th HumanoidCPU 0 96 166ms 3 days ago 418th HumanoidCPU 0 97 7ms 43 hours ago 419th Shanethegamer 🇺🇸 0 98 7ms 6 May 2025 420th snydej 0 99 43ms 22 Nov 2024 420th albanian-laundromat 0 99 343ms 6 days ago 420th dokutan 0 99 409ms 3 days ago 420th dokutan 0 99 12ms 34 hours ago 424th ovs-code 🇩🇪 0 100 160ms 2 days ago 425th HumanoidCPU 0 101 361ms 2 days ago 425th HumanoidCPU 0 101 382ms 2 days ago 427th sean-niemann 🇺🇸 0 102 286ms 8 May 2025 427th Shanethegamer 🇺🇸 0 102 307ms 8 May 2025 427th edsrzf 🇳🇿 0 102 295ms 9 May 2025 427th GolfingSuccess 🇬🇷 0 102 306ms 9 May 2025 427th ovs-code 🇩🇪 0 102 311ms 13 Dec 2025 427th kg583 🇺🇸 0 102 13ms 25 Jan 2026 427th CaedenHarper 🇨🇦 0 102 301ms 7 days ago 427th fuzzylojik-golf 🇺🇸 0 102 292ms 4 days ago 427th emgordon154 0 102 274ms 3 days ago 427th edsrzf 🇳🇿 0 102 341ms 2 days ago 427th Steffan153 🇫🇮 0 102 338ms 2 days ago 427th Steffan153 🇫🇮 0 102 284ms 2 days ago 427th MeWhenI 🇻🇦 0 102 287ms 35 hours ago 440th lukechampine 0 103 301ms 7 Jun 2025 440th chris124567 0 103 294ms 8 Jun 2025 440th albanian-laundromat 0 103 270ms 16 Dec 2025 440th GolfingSuccess 🇬🇷 0 103 336ms 14 Jan 2026 440th HumanoidCPU 0 103 329ms 2 days ago 440th Jacob385 0 103 411ms 3 hours ago 446th madex 🇩🇪 0 104 226ms 36 hours ago 447th madex 🇩🇪 0 106 334ms 85 mins ago 448th UnderKoen 🇳🇱 0 107 2,121ms 3 days ago 449th HumanoidCPU 0 108 13ms 43 hours ago 450th edsrzf 🇳🇿 0 109 21ms 2 days ago 450th emgordon154 0 109 84ms 2 days ago 452nd Steffan153 🇫🇮 0 110 28ms 2 days ago 452nd edsrzf 🇳🇿 0 110 31ms 2 days ago 454th GolfingSuccess 🇬🇷 0 111 107ms 2 days ago 455th retrohun 0 112 16ms 4 days ago 455th edsrzf 🇳🇿 0 112 27ms 2 days ago 455th madex 🇩🇪 0 112 1,387ms 85 mins ago 458th prestosilver 🇺🇸 0 115 418ms 4 days ago 458th HumanoidCPU 0 115 260ms 2 days ago 460th GolfingSuccess 🇬🇷 0 117 34ms 25 Dec 2025 461st madex 🇩🇪 0 118 17ms 85 mins ago 462nd not-a-pokemon 0 119 15ms 3 days ago 463rd madex 🇩🇪 0 121 366ms 86 mins ago 464th edsrzf 🇳🇿 0 127 58ms 3 days ago 464th Steffan153 🇫🇮 0 127 57ms 47 hours ago 466th saito-ta 🇯🇵 0 128 1,990ms 8 May 2025 467th CaedenHarper 🇨🇦 0 129 446ms 7 days ago 468th Natanaelel 🇸🇪 0 130 360ms 2 May 2025 468th madex 🇩🇪 0 130 412ms 37 hours ago 468th madex 🇩🇪 0 130 269ms 2 hours ago 471st edsrzf 🇳🇿 0 134 22ms 2 days ago 472nd GolfingSuccess 🇬🇷 0 135 80ms 32 hours ago 473rd Shanethegamer 🇺🇸 0 136 315ms 26 Nov 2024 474th albanian-laundromat 0 137 27ms 6 days ago 475th GolfingSuccess 🇬🇷 0 138 336ms 8 May 2025 476th dokutan 0 140 279ms 22 hours ago 477th canissimia 🇦🇶 0 143 15ms 3 days ago 478th emgordon154 0 150 15ms 9 May 2025 478th albanian-laundromat 0 150 28ms 6 days ago 480th kasarino 0 157 12ms 3 days ago First Prev 401–480 of 496 Next Last