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 79th edsrzf 🇳🇿 0 41 1,468ms 11 hours ago 82nd Shanethegamer 🇺🇸 0 42 10ms 7 Feb 2026 82nd anter69 🇭🇺 0 42 1,272ms 36 hours ago 84th sean-niemann 🇺🇸 0 43 8ms 8 May 2025 84th targrik 0 43 9ms 3 Sep 2025 84th lyphyser 0 43 53ms 7 hours ago 87th Shanethegamer 🇺🇸 0 44 12ms 10 Dec 2024 87th DialFrost 🇸🇬 0 44 11ms 24 Feb 2025 87th rucin93 🇵🇱 0 44 12ms 24 Feb 2025 87th error256 0 44 14ms 12 Apr 2025 87th GolfingSuccess 🇬🇷 0 44 9ms 8 May 2025 87th GolfingSuccess 🇬🇷 0 44 13ms 8 May 2025 87th Natanaelel 🇸🇪 0 44 12ms 8 May 2025 87th sean-niemann 🇺🇸 0 44 12ms 8 May 2025 87th edsrzf 🇳🇿 0 44 9ms 10 May 2025 87th 4atj 0 44 15ms 8 Jun 2025 87th lukegustafson 🇺🇸 0 44 14ms 16 Jun 2025 87th JOrE20 0 44 12ms 6 Dec 2025 87th AdrienHache 🇫🇷 0 44 60ms 5 Feb 2026 87th voytxt 🇨🇿 0 44 12ms 6 Feb 2026 87th Steffan153 🇫🇮 0 44 16ms 19 Feb 2026 87th CaedenHarper 🇨🇦 0 44 14ms 3 days ago 87th fuzzylojik-golf 🇺🇸 0 44 11ms 2 days ago 87th fuzzylojik-golf 🇺🇸 0 44 9ms 2 days ago 87th Yax42 🇫🇷 0 44 12ms 38 hours ago 87th helbling 🇨🇭 0 44 12ms 36 hours ago 87th HumanoidCPU 0 44 15ms 22 hours ago 87th emgordon154 0 44 12ms 17 hours ago 87th MeWhenI 🇻🇦 0 44 14ms 12 hours ago 87th edsrzf 🇳🇿 0 44 13ms 11 hours ago 87th ComradeSquirrel 0 44 12ms 2 hours ago 112th Andrey-Plotnikov 0 45 12ms 10 Jan 2025 112th saito-ta 🇯🇵 0 45 555ms 10 May 2025 112th XenThe 🇬🇧 0 45 14ms 15 Jul 2025 112th smclaughlin-cf 0 45 13ms 14 Oct 2025 112th albanian-laundromat 0 45 12ms 4 days ago 117th Shanethegamer 🇺🇸 0 46 377ms 26 Nov 2024 117th Shanethegamer 🇺🇸 0 46 8ms 30 Apr 2025 117th GolfingSuccess 🇬🇷 0 46 7ms 8 May 2025 117th rucin93 🇵🇱 0 46 8ms 11 May 2025 117th edsrzf 🇳🇿 0 46 7ms 2 days ago 122nd LukeBridges 🇬🇧 0 47 11ms 42 hours ago 123rd HumanoidCPU 0 48 1,424ms 21 hours ago 124th kg583 🇺🇸 0 50 470ms 1 Dec 2024 124th Shanethegamer 🇺🇸 0 50 471ms 10 Dec 2024 124th GolfingSuccess 🇬🇷 0 50 460ms 30 Dec 2024 124th ovs-code 🇩🇪 0 50 448ms 23 Feb 2025 124th pardouin 🇫🇷 0 50 433ms 24 Feb 2025 124th emgordon154 0 50 424ms 9 May 2025 124th Steffan153 🇫🇮 0 50 378ms 27 days ago 124th CaedenHarper 🇨🇦 0 50 733ms 4 days ago 124th Steffan153 🇫🇮 0 50 776ms 4 days ago 124th edsrzf 🇳🇿 0 50 872ms 4 days ago 124th GolfingSuccess 🇬🇷 0 50 765ms 3 days ago 124th fuzzylojik-golf 🇺🇸 0 50 420ms 2 days ago 136th lifthrasiir 🇰🇷 0 51 433ms 11 Dec 2024 136th Shanethegamer 🇺🇸 0 51 5ms 30 Apr 2025 136th GolfingSuccess 🇬🇷 0 51 157ms 8 May 2025 136th rucin93 🇵🇱 0 51 159ms 8 May 2025 136th Shanethegamer 🇺🇸 0 51 150ms 8 May 2025 136th sean-niemann 🇺🇸 0 51 150ms 9 May 2025 136th DialFrost 🇸🇬 0 51 302ms 8 Sep 2025 136th albanian-laundromat 0 51 5ms 27 hours ago 144th DialFrost 🇸🇬 0 52 461ms 17 Feb 2025 144th CaedenHarper 🇨🇦 0 52 530ms 4 days ago 144th HumanoidCPU 0 52 394ms 34 hours ago 147th antimon2 🇯🇵 0 53 288ms 16 Dec 2024 147th Shanethegamer 🇺🇸 0 53 315ms 1 Feb 2025 147th dokutan 0 53 426ms 15 Aug 2025 147th MeWhenI 🇻🇦 0 53 393ms 21 Nov 2025 147th albanian-laundromat 0 53 467ms 15 Jan 2026 147th AlephSquirrel 0 53 383ms 3 days ago 147th DialFrost 🇸🇬 0 53 330ms 10 hours ago 154th Shanethegamer 🇺🇸 0 54 69ms 12 Dec 2024 154th error256 0 54 66ms 12 Apr 2025 154th albanian-laundromat 0 54 779ms 15 Jan 2026 154th GolfingSuccess 🇬🇷 0 54 71ms 3 days ago 154th dokutan 0 54 778ms 37 hours ago 154th fuzzylojik-golf 🇺🇸 0 54 81ms 18 hours ago 160th albanian-laundromat 0 55 39ms 4 days ago First Prev 81–160 of 417 Next Last