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 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 56ms 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 27 days ago 4th darrenks 🇺🇸 0 7 53ms 2 days ago 4th plcc0 0 7 55ms 14 hours ago 12th ovs-code 🇩🇪 0 8 61ms 12 Oct 2025 13th GolfingSuccess 🇬🇷 0 13 158ms 8 May 2025 13th Shanethegamer 🇺🇸 0 13 148ms 30 May 2025 15th saito-ta 🇯🇵 0 17 82ms 9 May 2025 15th ovs-code 🇩🇪 0 17 4ms 12 Oct 2025 15th 2bular 0 17 4ms 12 Oct 2025 15th SirBogman 🇺🇸 0 17 4ms 12 Oct 2025 15th GolfingSuccess 🇬🇷 0 17 80ms 13 Dec 2025 15th fuzzylojik-golf 🇺🇸 0 17 87ms 28 hours ago 15th zacjl 0 17 4ms 16 hours ago 22nd GolfingSuccess 🇬🇷 0 18 6ms 13 Dec 2025 22nd Steffan153 🇫🇮 0 18 7ms 5 hours ago 24th pardouin 🇫🇷 0 19 91ms 25 Feb 2025 24th MeWhenI 🇻🇦 0 19 79ms 8 May 2025 24th emgordon154 0 19 84ms 22 Nov 2025 24th CaedenHarper 🇨🇦 0 19 80ms 4 days ago 24th plcc0 0 19 82ms 29 hours ago 29th Pyroan 0 22 92ms 24 hours ago 30th JOrE20 0 24 91ms 13 Feb 2026 31st plcc0 0 26 6ms 14 hours ago 32nd Shanethegamer 🇺🇸 0 27 4ms 26 Nov 2024 32nd Natanaelel 🇸🇪 0 27 6ms 8 May 2025 32nd saito-ta 🇯🇵 0 27 4ms 8 May 2025 32nd Natanaelel 🇸🇪 0 27 4ms 11 May 2025 32nd GolfingSuccess 🇬🇷 0 27 4ms 3 days ago 32nd fuzzylojik-golf 🇺🇸 0 27 4ms 2 days ago 32nd Solathian 0 27 4ms 6 hours ago 32nd Steffan153 🇫🇮 0 27 5ms 5 hours ago 40th emgordon154 0 28 7ms 17 hours ago 41st bitsandbeyond 🇳🇱 0 30 383ms 20 Oct 2025 41st 2bular 0 30 40ms 16 Nov 2025 41st ovs-code 🇩🇪 0 30 37ms 16 Nov 2025 41st IISResetMe 0 30 401ms 10 Jan 2026 41st GolfingSuccess 🇬🇷 0 30 493ms 4 Feb 2026 46th Natanaelel 🇸🇪 0 31 100ms 2 days ago 47th Shanethegamer 🇺🇸 0 32 102ms 26 Nov 2024 47th DialFrost 🇸🇬 0 32 166ms 24 Feb 2025 47th fuzzylojik-golf 🇺🇸 0 32 98ms 2 days ago 47th Natanaelel 🇸🇪 0 32 37ms 2 days ago 47th Steffan153 🇫🇮 0 32 176ms 40 hours ago 52nd Shanethegamer 🇺🇸 0 33 43ms 9 Dec 2024 52nd stefangimmillaro 0 33 36ms 24 Jan 2025 52nd radarek 🇵🇱 0 33 38ms 17 Feb 2025 52nd DialFrost 🇸🇬 0 33 37ms 24 Feb 2025 52nd error256 0 33 38ms 12 Apr 2025 52nd MeWhenI 🇻🇦 0 33 35ms 15 Apr 2025 52nd Natanaelel 🇸🇪 0 33 37ms 2 May 2025 52nd sean-niemann 🇺🇸 0 33 37ms 8 May 2025 52nd GolfingSuccess 🇬🇷 0 33 40ms 8 May 2025 52nd pardouin 🇫🇷 0 33 41ms 15 Feb 2026 52nd Steffan153 🇫🇮 0 33 37ms 19 Feb 2026 52nd CaedenHarper 🇨🇦 0 33 41ms 3 days ago 52nd emgordon154 0 33 39ms 2 days ago 52nd Andriamanitra 🇫🇮 0 33 42ms 2 days ago 52nd fuzzylojik-golf 🇺🇸 0 33 37ms 26 hours ago 67th SirBogman 🇺🇸 0 34 37ms 9 Oct 2025 67th Matter1024 🇮🇳 0 34 38ms 2 days ago 67th anter69 🇭🇺 0 34 38ms 2 days ago 67th fuzzylojik-golf 🇺🇸 0 34 36ms 28 hours ago 67th edsrzf 🇳🇿 0 34 37ms 16 hours ago 72nd BREMAUCY 🇫🇷 0 35 36ms 2 days ago 73rd JOrE20 0 37 252ms 9 Dec 2025 74th HumanoidCPU 0 38 36ms 34 hours ago 75th error256 0 40 1,440ms 12 Apr 2025 75th Shanethegamer 🇺🇸 0 40 1,476ms 30 Apr 2025 75th sean-niemann 🇺🇸 0 40 1,463ms 8 May 2025 75th GolfingSuccess 🇬🇷 0 40 1,433ms 8 May 2025 75th pardouin 🇫🇷 0 40 1,420ms 15 Feb 2026 75th emgordon154 0 40 1,438ms 2 days ago 1–80 of 446 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