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 195th anter69 🇭🇺 0 62 15ms 2 days ago 195th HumanoidCPU 0 62 16ms 46 hours ago 195th qpwoeirut 0 62 17ms 41 hours ago 195th stefangimmillaro 0 62 16ms 40 hours ago 195th btjones0 0 62 15ms 38 hours ago 195th bzijlema 🇳🇱 0 62 16ms 35 hours ago 195th ahmetdemirag 🇨🇾 0 62 15ms 32 hours ago 195th plcc0 0 62 15ms 32 hours ago 195th Pyroan 0 62 19ms 25 hours ago 195th edsrzf 🇳🇿 0 62 15ms 24 hours ago 195th zacjl 0 62 17ms 17 hours ago 195th MeWhenI 🇻🇦 0 62 86ms 15 hours ago 195th ComradeSquirrel 0 62 14ms 14 hours ago 195th duckyluuk 🇳🇱 0 62 15ms 8 hours ago 255th sean-niemann 🇺🇸 0 63 43ms 8 May 2025 255th albanian-laundromat 0 63 44ms 14 Jan 2026 255th tomh1012 0 63 15ms 2 days ago 255th MeWhenI 🇻🇦 0 63 204ms 25 hours ago 255th mishak-sys 0 63 15ms 7 hours ago 260th jameswmccarty 0 64 15ms 29 Mar 2025 260th albanian-laundromat 0 64 188ms 4 days ago 260th zgialor-lab 0 64 16ms 27 hours ago 263rd JDiLenarda 🇫🇷 0 65 1,347ms 30 hours ago 264th Shanethegamer 🇺🇸 0 66 1,317ms 26 Nov 2024 264th rucin93 🇵🇱 0 66 6ms 8 May 2025 264th sean-niemann 🇺🇸 0 66 7ms 8 May 2025 264th AdrienHache 🇫🇷 0 66 421ms 2 Nov 2025 264th namelessiw 0 66 474ms 2 Nov 2025 264th GolfingSuccess 🇬🇷 0 66 430ms 4 Feb 2026 264th albanian-laundromat 0 66 1,345ms 4 days ago 264th Yax42 🇫🇷 0 66 484ms 3 days ago 264th fuzzylojik-golf 🇺🇸 0 66 456ms 2 days ago 264th edsrzf 🇳🇿 0 66 7ms 40 hours ago 264th edsrzf 🇳🇿 0 66 1,345ms 23 hours ago 264th edsrzf 🇳🇿 0 66 451ms 11 hours ago 264th Steffan153 🇫🇮 0 66 480ms 5 hours ago 264th Steffan153 🇫🇮 0 66 7ms 24 mins ago 278th GolfingSuccess 🇬🇷 0 67 12ms 8 May 2025 278th tomh1012 0 67 429ms 2 days ago 280th Shanethegamer 🇺🇸 0 68 145ms 26 Nov 2024 280th sean-niemann 🇺🇸 0 68 131ms 8 May 2025 280th edsrzf 🇳🇿 0 68 113ms 25 May 2025 280th GolfingSuccess 🇬🇷 0 68 110ms 3 days ago 280th fuzzylojik-golf 🇺🇸 0 68 1,320ms 29 hours ago 280th Steffan153 🇫🇮 0 68 104ms 5 hours ago 286th GolfingSuccess 🇬🇷 0 69 10ms 8 May 2025 286th CaedenHarper 🇨🇦 0 69 486ms 3 days ago 288th JOrE20 0 70 41ms 13 Feb 2026 289th kg583 🇺🇸 0 71 27ms 1 Dec 2024 289th CLOStrophobic 🇮🇹 0 71 13ms 18 Jan 2025 289th GolfingSuccess 🇬🇷 0 71 14ms 7 May 2025 289th edsrzf 🇳🇿 0 71 14ms 8 May 2025 289th AlephSquirrel 0 71 13ms 9 May 2025 294th Shanethegamer 🇺🇸 0 72 27ms 9 Dec 2024 294th dokutan 0 72 62ms 8 Feb 2026 296th GolfingSuccess 🇬🇷 0 73 16ms 8 May 2025 296th GolfingSuccess 🇬🇷 0 73 8ms 23 hours ago 298th not-a-pokemon 0 74 15ms 28 hours ago 299th Shanethegamer 🇺🇸 0 75 99ms 26 Nov 2024 299th sean-niemann 🇺🇸 0 75 103ms 8 May 2025 299th HumanoidCPU 0 75 112ms 33 hours ago 302nd GolfingSuccess 🇬🇷 0 76 133ms 28 Nov 2025 302nd fuzzylojik-golf 🇺🇸 0 76 99ms 2 days ago 302nd edsrzf 🇳🇿 0 76 131ms 2 days ago 302nd emgordon154 0 76 115ms 40 hours ago 302nd MeWhenI 🇻🇦 0 76 98ms 25 hours ago 307th rucin93 🇵🇱 0 77 130ms 8 May 2025 307th ovs-code 🇩🇪 0 77 81ms 30 May 2025 307th Shanethegamer 🇺🇸 0 77 146ms 12 Nov 2025 307th edsrzf 🇳🇿 0 77 7ms 25 hours ago 307th GolfingSuccess 🇬🇷 0 77 8ms 23 hours ago 307th Steffan153 🇫🇮 0 77 7ms 14 mins ago 313th saito-ta 🇯🇵 0 78 4ms 10 May 2025 313th rhdqor213 0 78 4ms 10 May 2025 313th albanian-laundromat 0 78 93ms 4 days ago 313th fuzzylojik-golf 🇺🇸 0 78 8ms 30 hours ago 313th edsrzf 🇳🇿 0 78 425ms 23 hours ago 318th GolfingSuccess 🇬🇷 0 79 79ms 14 May 2025 319th sean-niemann 🇺🇸 0 80 455ms 8 May 2025 320th kumavale 0 81 156ms 26 Nov 2025 First Prev 241–320 of 446 Next Last