The Gray Code Decoder and Gray Code Encoder holes will go live in approximately 2 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 215th SirBogman 🇺🇸 0 62 15ms 12 Oct 2025 215th KasperKivimaeki 🇫🇮 0 62 15ms 20 Oct 2025 215th albanian-laundromat 0 62 16ms 2 Dec 2025 215th Matter1024 🇮🇳 0 62 15ms 12 Feb 2026 215th Steffan153 🇫🇮 0 62 16ms 19 Feb 2026 215th lukegustafson 🇺🇸 0 62 36ms 20 days ago 215th aksyristos 0 62 14ms 17 days ago 215th madex 🇩🇪 0 62 15ms 9 days ago 215th CaedenHarper 🇨🇦 0 62 16ms 7 days ago 215th KatieLG 🇬🇧 0 62 16ms 5 days ago 215th KatieLG 🇬🇧 0 62 416ms 5 days ago 215th scpchicken 🇵🇼 0 62 15ms 5 days ago 215th fuzzylojik-golf 🇺🇸 0 62 15ms 5 days ago 215th StefanHabel 🇨🇦 0 62 15ms 5 days ago 215th Seek64 🇩🇪 0 62 15ms 5 days ago 215th blaztoma 🇱🇹 0 62 15ms 5 days ago 215th BREMAUCY 🇫🇷 0 62 16ms 5 days ago 215th Emutis 🇱🇹 0 62 16ms 5 days ago 215th Andrey2001 0 62 16ms 4 days ago 215th anter69 🇭🇺 0 62 15ms 4 days ago 215th HumanoidCPU 0 62 16ms 4 days ago 215th qpwoeirut 0 62 17ms 4 days ago 215th stefangimmillaro 0 62 16ms 4 days ago 215th btjones0 0 62 15ms 4 days ago 215th bzijlema 🇳🇱 0 62 16ms 4 days ago 215th ahmetdemirag 🇨🇾 0 62 15ms 4 days ago 215th plcc0 0 62 15ms 4 days ago 215th Pyroan 0 62 19ms 3 days ago 215th edsrzf 🇳🇿 0 62 15ms 3 days ago 215th zacjl 0 62 17ms 3 days ago 215th MeWhenI 🇻🇦 0 62 86ms 3 days ago 215th ComradeSquirrel 0 62 14ms 3 days ago 215th duckyluuk 🇳🇱 0 62 15ms 3 days ago 215th Aquateraneal 🇺🇸 0 62 15ms 2 days ago 215th madex 🇩🇪 0 62 439ms 2 days ago 215th madex 🇩🇪 0 62 1,125ms 2 days ago 215th luuumine 🇫🇷 0 62 19ms 2 days ago 215th solisolu 0 62 15ms 17 hours ago 215th LostSyntax21 🇬🇧 0 62 16ms 50 mins ago 280th sean-niemann 🇺🇸 0 63 43ms 8 May 2025 280th albanian-laundromat 0 63 44ms 14 Jan 2026 280th tomh1012 0 63 15ms 5 days ago 280th mishak-sys 0 63 15ms 3 days ago 284th jameswmccarty 0 64 15ms 29 Mar 2025 284th albanian-laundromat 0 64 188ms 7 days ago 284th zgialor-lab 0 64 16ms 3 days ago 287th JDiLenarda 🇫🇷 0 65 1,347ms 3 days ago 288th Shanethegamer 🇺🇸 0 66 1,317ms 26 Nov 2024 288th rucin93 🇵🇱 0 66 6ms 8 May 2025 288th sean-niemann 🇺🇸 0 66 7ms 8 May 2025 288th AdrienHache 🇫🇷 0 66 421ms 2 Nov 2025 288th namelessiw 0 66 474ms 2 Nov 2025 288th GolfingSuccess 🇬🇷 0 66 430ms 4 Feb 2026 288th albanian-laundromat 0 66 1,345ms 7 days ago 288th Yax42 🇫🇷 0 66 461ms 6 days ago 288th fuzzylojik-golf 🇺🇸 0 66 456ms 5 days ago 288th edsrzf 🇳🇿 0 66 7ms 4 days ago 288th edsrzf 🇳🇿 0 66 1,345ms 3 days ago 288th edsrzf 🇳🇿 0 66 451ms 3 days ago 288th Steffan153 🇫🇮 0 66 480ms 2 days ago 288th Steffan153 🇫🇮 0 66 7ms 2 days ago 302nd GolfingSuccess 🇬🇷 0 67 12ms 8 May 2025 302nd tomh1012 0 67 429ms 5 days ago 302nd msbranicky 0 67 16ms 2 days ago 305th Shanethegamer 🇺🇸 0 68 145ms 26 Nov 2024 305th sean-niemann 🇺🇸 0 68 131ms 8 May 2025 305th edsrzf 🇳🇿 0 68 113ms 25 May 2025 305th GolfingSuccess 🇬🇷 0 68 110ms 6 days ago 305th fuzzylojik-golf 🇺🇸 0 68 1,320ms 3 days ago 305th Steffan153 🇫🇮 0 68 104ms 2 days ago 311th GolfingSuccess 🇬🇷 0 69 10ms 8 May 2025 311th CaedenHarper 🇨🇦 0 69 486ms 6 days ago 311th MeWhenI 🇻🇦 0 69 454ms 2 days ago 314th JOrE20 0 70 41ms 13 Feb 2026 315th kg583 🇺🇸 0 71 27ms 1 Dec 2024 315th CLOStrophobic 🇮🇹 0 71 13ms 18 Jan 2025 315th GolfingSuccess 🇬🇷 0 71 14ms 7 May 2025 315th edsrzf 🇳🇿 0 71 14ms 8 May 2025 315th AlephSquirrel 0 71 13ms 9 May 2025 315th emgordon154 0 71 32ms 6 hours ago First Prev 241–320 of 501 Next Last