The Gray Code Decoder and Gray Code Encoder holes will go live in approximately 4 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 210th lukegustafson 🇺🇸 0 62 36ms 18 days ago 210th aksyristos 0 62 14ms 15 days ago 210th madex 🇩🇪 0 62 15ms 7 days ago 210th CaedenHarper 🇨🇦 0 62 16ms 5 days ago 210th KatieLG 🇬🇧 0 62 17ms 3 days ago 210th KatieLG 🇬🇧 0 62 416ms 3 days ago 210th scpchicken 🇵🇼 0 62 15ms 3 days ago 210th fuzzylojik-golf 🇺🇸 0 62 15ms 3 days ago 210th StefanHabel 🇨🇦 0 62 15ms 3 days ago 210th Seek64 🇩🇪 0 62 15ms 3 days ago 210th blaztoma 🇱🇹 0 62 15ms 3 days ago 210th BREMAUCY 🇫🇷 0 62 16ms 3 days ago 210th Emutis 🇱🇹 0 62 16ms 3 days ago 210th Andrey2001 0 62 16ms 3 days ago 210th anter69 🇭🇺 0 62 15ms 2 days ago 210th HumanoidCPU 0 62 16ms 2 days ago 210th qpwoeirut 0 62 17ms 2 days ago 210th stefangimmillaro 0 62 16ms 2 days ago 210th btjones0 0 62 15ms 2 days ago 210th bzijlema 🇳🇱 0 62 16ms 2 days ago 210th ahmetdemirag 🇨🇾 0 62 15ms 2 days ago 210th plcc0 0 62 15ms 2 days ago 210th Pyroan 0 62 19ms 47 hours ago 210th edsrzf 🇳🇿 0 62 15ms 46 hours ago 210th zacjl 0 62 17ms 38 hours ago 210th MeWhenI 🇻🇦 0 62 86ms 37 hours ago 210th ComradeSquirrel 0 62 14ms 35 hours ago 210th duckyluuk 🇳🇱 0 62 15ms 30 hours ago 210th Aquateraneal 🇺🇸 0 62 15ms 19 hours ago 210th madex 🇩🇪 0 62 439ms 10 hours ago 210th madex 🇩🇪 0 62 1,125ms 10 hours ago 210th luuumine 🇫🇷 0 62 19ms 4 hours ago 273rd sean-niemann 🇺🇸 0 63 43ms 8 May 2025 273rd albanian-laundromat 0 63 44ms 14 Jan 2026 273rd tomh1012 0 63 15ms 3 days ago 273rd mishak-sys 0 63 15ms 28 hours ago 277th jameswmccarty 0 64 15ms 29 Mar 2025 277th albanian-laundromat 0 64 188ms 5 days ago 277th zgialor-lab 0 64 16ms 2 days ago 280th JDiLenarda 🇫🇷 0 65 1,347ms 2 days ago 281st Shanethegamer 🇺🇸 0 66 1,317ms 26 Nov 2024 281st rucin93 🇵🇱 0 66 6ms 8 May 2025 281st sean-niemann 🇺🇸 0 66 7ms 8 May 2025 281st AdrienHache 🇫🇷 0 66 421ms 2 Nov 2025 281st namelessiw 0 66 474ms 2 Nov 2025 281st GolfingSuccess 🇬🇷 0 66 430ms 4 Feb 2026 281st albanian-laundromat 0 66 1,345ms 5 days ago 281st Yax42 🇫🇷 0 66 461ms 4 days ago 281st fuzzylojik-golf 🇺🇸 0 66 456ms 3 days ago 281st edsrzf 🇳🇿 0 66 7ms 2 days ago 281st edsrzf 🇳🇿 0 66 1,345ms 45 hours ago 281st edsrzf 🇳🇿 0 66 451ms 33 hours ago 281st Steffan153 🇫🇮 0 66 480ms 26 hours ago 281st Steffan153 🇫🇮 0 66 7ms 22 hours ago 295th GolfingSuccess 🇬🇷 0 67 12ms 8 May 2025 295th tomh1012 0 67 429ms 3 days ago 295th msbranicky 0 67 16ms 7 hours ago 298th Shanethegamer 🇺🇸 0 68 145ms 26 Nov 2024 298th sean-niemann 🇺🇸 0 68 131ms 8 May 2025 298th edsrzf 🇳🇿 0 68 113ms 25 May 2025 298th GolfingSuccess 🇬🇷 0 68 110ms 4 days ago 298th fuzzylojik-golf 🇺🇸 0 68 1,320ms 2 days ago 298th Steffan153 🇫🇮 0 68 104ms 26 hours ago 304th GolfingSuccess 🇬🇷 0 69 10ms 8 May 2025 304th CaedenHarper 🇨🇦 0 69 486ms 4 days ago 304th MeWhenI 🇻🇦 0 69 454ms 8 hours ago 307th JOrE20 0 70 41ms 13 Feb 2026 308th kg583 🇺🇸 0 71 27ms 1 Dec 2024 308th CLOStrophobic 🇮🇹 0 71 13ms 18 Jan 2025 308th GolfingSuccess 🇬🇷 0 71 14ms 7 May 2025 308th edsrzf 🇳🇿 0 71 14ms 8 May 2025 308th AlephSquirrel 0 71 13ms 9 May 2025 313th Shanethegamer 🇺🇸 0 72 27ms 9 Dec 2024 313th dokutan 0 72 62ms 8 Feb 2026 315th GolfingSuccess 🇬🇷 0 73 16ms 8 May 2025 315th GolfingSuccess 🇬🇷 0 73 8ms 45 hours ago 317th not-a-pokemon 0 74 15ms 2 days ago 318th Shanethegamer 🇺🇸 0 75 107ms 26 Nov 2024 318th sean-niemann 🇺🇸 0 75 106ms 8 May 2025 318th HumanoidCPU 0 75 110ms 2 days ago First Prev 241–320 of 481 Next Last