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 208th madex 🇩🇪 0 62 15ms 7 days ago 208th CaedenHarper 🇨🇦 0 62 16ms 5 days ago 208th KatieLG 🇬🇧 0 62 17ms 3 days ago 208th KatieLG 🇬🇧 0 62 416ms 3 days ago 208th scpchicken 🇵🇼 0 62 15ms 3 days ago 208th fuzzylojik-golf 🇺🇸 0 62 15ms 3 days ago 208th StefanHabel 🇨🇦 0 62 15ms 3 days ago 208th Seek64 🇩🇪 0 62 15ms 3 days ago 208th blaztoma 🇱🇹 0 62 15ms 3 days ago 208th BREMAUCY 🇫🇷 0 62 16ms 3 days ago 208th Emutis 🇱🇹 0 62 16ms 3 days ago 208th Andrey2001 0 62 16ms 2 days ago 208th anter69 🇭🇺 0 62 15ms 2 days ago 208th HumanoidCPU 0 62 16ms 2 days ago 208th qpwoeirut 0 62 17ms 2 days ago 208th stefangimmillaro 0 62 16ms 2 days ago 208th btjones0 0 62 15ms 2 days ago 208th bzijlema 🇳🇱 0 62 16ms 2 days ago 208th ahmetdemirag 🇨🇾 0 62 15ms 46 hours ago 208th plcc0 0 62 15ms 46 hours ago 208th Pyroan 0 62 19ms 39 hours ago 208th edsrzf 🇳🇿 0 62 15ms 38 hours ago 208th zacjl 0 62 17ms 31 hours ago 208th MeWhenI 🇻🇦 0 62 86ms 30 hours ago 208th ComradeSquirrel 0 62 14ms 28 hours ago 208th duckyluuk 🇳🇱 0 62 15ms 22 hours ago 208th Aquateraneal 🇺🇸 0 62 15ms 11 hours ago 208th madex 🇩🇪 0 62 439ms 3 hours ago 208th madex 🇩🇪 0 62 1,125ms 3 hours ago 270th sean-niemann 🇺🇸 0 63 43ms 8 May 2025 270th albanian-laundromat 0 63 44ms 14 Jan 2026 270th tomh1012 0 63 15ms 2 days ago 270th mishak-sys 0 63 15ms 21 hours ago 274th jameswmccarty 0 64 15ms 29 Mar 2025 274th albanian-laundromat 0 64 188ms 5 days ago 274th zgialor-lab 0 64 16ms 42 hours ago 277th JDiLenarda 🇫🇷 0 65 1,347ms 45 hours ago 278th Shanethegamer 🇺🇸 0 66 1,317ms 26 Nov 2024 278th rucin93 🇵🇱 0 66 6ms 8 May 2025 278th sean-niemann 🇺🇸 0 66 7ms 8 May 2025 278th AdrienHache 🇫🇷 0 66 421ms 2 Nov 2025 278th namelessiw 0 66 474ms 2 Nov 2025 278th GolfingSuccess 🇬🇷 0 66 430ms 4 Feb 2026 278th albanian-laundromat 0 66 1,345ms 5 days ago 278th Yax42 🇫🇷 0 66 461ms 3 days ago 278th fuzzylojik-golf 🇺🇸 0 66 456ms 3 days ago 278th edsrzf 🇳🇿 0 66 7ms 2 days ago 278th edsrzf 🇳🇿 0 66 1,345ms 38 hours ago 278th edsrzf 🇳🇿 0 66 451ms 26 hours ago 278th Steffan153 🇫🇮 0 66 480ms 19 hours ago 278th Steffan153 🇫🇮 0 66 7ms 14 hours ago 292nd GolfingSuccess 🇬🇷 0 67 12ms 8 May 2025 292nd tomh1012 0 67 429ms 2 days ago 294th Shanethegamer 🇺🇸 0 68 145ms 26 Nov 2024 294th sean-niemann 🇺🇸 0 68 131ms 8 May 2025 294th edsrzf 🇳🇿 0 68 113ms 25 May 2025 294th GolfingSuccess 🇬🇷 0 68 110ms 4 days ago 294th fuzzylojik-golf 🇺🇸 0 68 1,320ms 43 hours ago 294th Steffan153 🇫🇮 0 68 104ms 19 hours ago 300th GolfingSuccess 🇬🇷 0 69 10ms 8 May 2025 300th CaedenHarper 🇨🇦 0 69 486ms 4 days ago 300th MeWhenI 🇻🇦 0 69 454ms 74 mins ago 303rd JOrE20 0 70 41ms 13 Feb 2026 304th kg583 🇺🇸 0 71 27ms 1 Dec 2024 304th CLOStrophobic 🇮🇹 0 71 13ms 18 Jan 2025 304th GolfingSuccess 🇬🇷 0 71 14ms 7 May 2025 304th edsrzf 🇳🇿 0 71 14ms 8 May 2025 304th AlephSquirrel 0 71 13ms 9 May 2025 309th Shanethegamer 🇺🇸 0 72 27ms 9 Dec 2024 309th dokutan 0 72 62ms 8 Feb 2026 311th GolfingSuccess 🇬🇷 0 73 16ms 8 May 2025 311th GolfingSuccess 🇬🇷 0 73 8ms 37 hours ago 313th not-a-pokemon 0 74 15ms 43 hours ago 314th Shanethegamer 🇺🇸 0 75 107ms 26 Nov 2024 314th sean-niemann 🇺🇸 0 75 106ms 8 May 2025 314th HumanoidCPU 0 75 110ms 47 hours ago 314th MeWhenI 🇻🇦 0 75 102ms 81 mins ago 318th GolfingSuccess 🇬🇷 0 76 133ms 28 Nov 2025 318th fuzzylojik-golf 🇺🇸 0 76 99ms 3 days ago 318th edsrzf 🇳🇿 0 76 131ms 3 days ago First Prev 241–320 of 476 Next Last