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 bytes. 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 Bytes Time Submitted 1st namelessiw 0 6 160ms 13 Oct 2025 1st Shanethegamer 🇺🇸 0 6 210ms 20 Oct 2025 1st GolfingSuccess 🇬🇷 0 6 156ms 13 Dec 2025 4th Natanaelel 🇸🇪 0 7 68ms 2 May 2025 4th 2bular 0 7 62ms 2 May 2025 4th kg583 🇺🇸 0 7 262ms 8 May 2025 4th GolfingSuccess 🇬🇷 0 7 290ms 14 May 2025 4th Shanethegamer 🇺🇸 0 7 56ms 30 May 2025 4th JOrE20 0 7 275ms 24 days ago 10th ovs-code 🇩🇪 0 8 61ms 12 Oct 2025 11th GolfingSuccess 🇬🇷 0 13 158ms 8 May 2025 11th Shanethegamer 🇺🇸 0 13 148ms 30 May 2025 13th saito-ta 🇯🇵 0 17 82ms 9 May 2025 13th ovs-code 🇩🇪 0 17 3ms 12 Oct 2025 13th 2bular 0 17 4ms 12 Oct 2025 13th SirBogman 🇺🇸 0 17 4ms 12 Oct 2025 13th GolfingSuccess 🇬🇷 0 17 80ms 13 Dec 2025 18th GolfingSuccess 🇬🇷 0 18 6ms 13 Dec 2025 19th pardouin 🇫🇷 0 19 91ms 25 Feb 2025 19th MeWhenI 🇻🇦 0 19 80ms 8 May 2025 19th emgordon154 0 19 84ms 22 Nov 2025 19th CaedenHarper 🇨🇦 0 19 80ms 2 days ago 23rd fuzzylojik-golf 🇺🇸 0 20 79ms 11 hours ago 24th JOrE20 0 24 91ms 13 Feb 2026 25th Shanethegamer 🇺🇸 0 27 4ms 26 Nov 2024 25th Natanaelel 🇸🇪 0 27 6ms 8 May 2025 25th saito-ta 🇯🇵 0 27 4ms 8 May 2025 25th Natanaelel 🇸🇪 0 27 4ms 11 May 2025 25th GolfingSuccess 🇬🇷 0 27 4ms 39 hours ago 25th fuzzylojik-golf 🇺🇸 0 27 4ms 12 hours ago 31st bitsandbeyond 🇳🇱 0 30 383ms 20 Oct 2025 31st 2bular 0 30 40ms 16 Nov 2025 31st ovs-code 🇩🇪 0 30 37ms 16 Nov 2025 31st IISResetMe 0 30 401ms 10 Jan 2026 31st GolfingSuccess 🇬🇷 0 30 493ms 4 Feb 2026 36th Natanaelel 🇸🇪 0 31 100ms 4 hours ago 37th Shanethegamer 🇺🇸 0 32 102ms 26 Nov 2024 37th DialFrost 🇸🇬 0 32 180ms 24 Feb 2025 37th fuzzylojik-golf 🇺🇸 0 32 100ms 10 hours ago 37th Natanaelel 🇸🇪 0 32 37ms 3 hours ago 41st Shanethegamer 🇺🇸 0 33 43ms 9 Dec 2024 41st stefangimmillaro 0 33 42ms 24 Jan 2025 41st radarek 🇵🇱 0 33 38ms 17 Feb 2025 41st DialFrost 🇸🇬 0 33 40ms 24 Feb 2025 41st error256 0 33 38ms 12 Apr 2025 41st MeWhenI 🇻🇦 0 33 39ms 15 Apr 2025 41st Natanaelel 🇸🇪 0 33 37ms 2 May 2025 41st sean-niemann 🇺🇸 0 33 37ms 8 May 2025 41st GolfingSuccess 🇬🇷 0 33 40ms 8 May 2025 41st pardouin 🇫🇷 0 33 41ms 15 Feb 2026 41st Steffan153 🇫🇮 0 33 37ms 19 Feb 2026 41st CaedenHarper 🇨🇦 0 33 41ms 38 hours ago 41st emgordon154 0 33 39ms 9 hours ago 54th SirBogman 🇺🇸 0 34 37ms 9 Oct 2025 54th fuzzylojik-golf 🇺🇸 0 34 35ms 12 hours ago 54th Matter1024 🇮🇳 0 34 38ms 2 hours ago 57th BREMAUCY 🇫🇷 0 35 36ms 19 mins ago 58th fuzzylojik-golf 🇺🇸 0 36 35ms 11 hours ago 59th JOrE20 0 37 252ms 9 Dec 2025 60th error256 0 40 1,440ms 12 Apr 2025 60th Shanethegamer 🇺🇸 0 40 1,476ms 30 Apr 2025 60th sean-niemann 🇺🇸 0 40 1,463ms 8 May 2025 60th GolfingSuccess 🇬🇷 0 40 1,433ms 8 May 2025 60th pardouin 🇫🇷 0 40 1,420ms 15 Feb 2026 60th emgordon154 0 40 1,438ms 9 hours ago 66th GolfingSuccess 🇬🇷 0 41 16ms 8 Aug 2025 66th fuzzylojik-golf 🇺🇸 0 41 1,376ms 13 hours ago 68th Shanethegamer 🇺🇸 0 42 10ms 7 Feb 2026 69th sean-niemann 🇺🇸 0 43 8ms 8 May 2025 69th targrik 0 43 9ms 3 Sep 2025 71st Shanethegamer 🇺🇸 0 44 12ms 10 Dec 2024 71st DialFrost 🇸🇬 0 44 12ms 24 Feb 2025 71st rucin93 🇵🇱 0 44 10ms 24 Feb 2025 71st error256 0 44 11ms 12 Apr 2025 71st GolfingSuccess 🇬🇷 0 44 9ms 8 May 2025 71st GolfingSuccess 🇬🇷 0 44 12ms 8 May 2025 71st Natanaelel 🇸🇪 0 44 10ms 8 May 2025 71st sean-niemann 🇺🇸 0 44 11ms 8 May 2025 71st edsrzf 🇳🇿 0 44 9ms 10 May 2025 71st 4atj 0 44 11ms 8 Jun 2025 1–80 of 325 Next Last