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 chars. 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 Chars Time Submitted 229th hiichbindermax 0 62 18ms 17 Aug 2025 229th 5cw 🇺🇸 0 62 15ms 22 Aug 2025 229th commandz0 🇺🇸 0 62 15ms 27 Aug 2025 229th SirBogman 🇺🇸 0 62 15ms 12 Oct 2025 229th KasperKivimaeki 🇫🇮 0 62 15ms 20 Oct 2025 229th Matter1024 🇮🇳 0 62 15ms 12 Feb 2026 229th lukegustafson 🇺🇸 0 62 36ms 18 days ago 229th aksyristos 0 62 14ms 15 days ago 229th madex 🇩🇪 0 62 15ms 7 days ago 229th CaedenHarper 🇨🇦 0 62 16ms 6 days ago 229th KatieLG 🇬🇧 0 62 17ms 3 days ago 229th KatieLG 🇬🇧 0 62 416ms 3 days ago 229th scpchicken 🇵🇼 0 62 15ms 3 days ago 229th StefanHabel 🇨🇦 0 62 15ms 3 days ago 229th blaztoma 🇱🇹 0 62 15ms 3 days ago 229th Emutis 🇱🇹 0 62 16ms 3 days ago 229th Andrey2001 0 62 16ms 3 days ago 229th anter69 🇭🇺 0 62 15ms 2 days ago 229th qpwoeirut 0 62 17ms 2 days ago 229th stefangimmillaro 0 62 16ms 2 days ago 229th btjones0 0 62 15ms 2 days ago 229th bzijlema 🇳🇱 0 62 16ms 2 days ago 229th ahmetdemirag 🇨🇾 0 62 15ms 2 days ago 229th Pyroan 0 62 19ms 2 days ago 229th edsrzf 🇳🇿 0 62 15ms 46 hours ago 229th zacjl 0 62 17ms 39 hours ago 229th MeWhenI 🇻🇦 0 62 86ms 38 hours ago 229th ComradeSquirrel 0 62 14ms 36 hours ago 229th duckyluuk 🇳🇱 0 62 15ms 30 hours ago 229th Aquateraneal 🇺🇸 0 62 15ms 19 hours ago 229th madex 🇩🇪 0 62 439ms 11 hours ago 229th madex 🇩🇪 0 62 1,125ms 11 hours ago 229th luuumine 🇫🇷 0 62 19ms 5 hours ago 274th sean-niemann 🇺🇸 0 63 43ms 8 May 2025 274th albanian-laundromat 0 63 44ms 14 Jan 2026 274th tomh1012 0 63 15ms 3 days ago 274th mishak-sys 0 63 15ms 29 hours ago 278th jameswmccarty 0 64 15ms 29 Mar 2025 278th dokutan 0 64 63ms 8 Feb 2026 278th albanian-laundromat 0 64 188ms 5 days ago 278th zgialor-lab 0 64 16ms 2 days ago 282nd JDiLenarda 🇫🇷 0 65 1,347ms 2 days ago 283rd Shanethegamer 🇺🇸 0 66 1,317ms 26 Nov 2024 283rd rucin93 🇵🇱 0 66 6ms 8 May 2025 283rd sean-niemann 🇺🇸 0 66 7ms 8 May 2025 283rd AdrienHache 🇫🇷 0 66 421ms 2 Nov 2025 283rd namelessiw 0 66 474ms 2 Nov 2025 283rd GolfingSuccess 🇬🇷 0 66 430ms 4 Feb 2026 283rd albanian-laundromat 0 66 1,345ms 5 days ago 283rd Yax42 🇫🇷 0 66 461ms 4 days ago 283rd fuzzylojik-golf 🇺🇸 0 66 456ms 3 days ago 283rd edsrzf 🇳🇿 0 66 7ms 2 days ago 283rd edsrzf 🇳🇿 0 66 1,345ms 46 hours ago 283rd edsrzf 🇳🇿 0 66 451ms 34 hours ago 283rd Steffan153 🇫🇮 0 66 480ms 27 hours ago 283rd Steffan153 🇫🇮 0 66 7ms 22 hours ago 297th GolfingSuccess 🇬🇷 0 67 12ms 8 May 2025 297th tomh1012 0 67 429ms 3 days ago 297th msbranicky 0 67 16ms 7 hours ago 300th Shanethegamer 🇺🇸 0 68 145ms 26 Nov 2024 300th sean-niemann 🇺🇸 0 68 131ms 8 May 2025 300th edsrzf 🇳🇿 0 68 113ms 25 May 2025 300th GolfingSuccess 🇬🇷 0 68 110ms 4 days ago 300th fuzzylojik-golf 🇺🇸 0 68 1,320ms 2 days ago 300th Steffan153 🇫🇮 0 68 104ms 27 hours ago 306th GolfingSuccess 🇬🇷 0 69 10ms 8 May 2025 306th CaedenHarper 🇨🇦 0 69 486ms 4 days ago 306th MeWhenI 🇻🇦 0 69 454ms 9 hours ago 309th JOrE20 0 70 41ms 13 Feb 2026 310th kg583 🇺🇸 0 71 27ms 1 Dec 2024 310th CLOStrophobic 🇮🇹 0 71 13ms 18 Jan 2025 310th GolfingSuccess 🇬🇷 0 71 14ms 7 May 2025 310th edsrzf 🇳🇿 0 71 14ms 8 May 2025 310th AlephSquirrel 0 71 13ms 9 May 2025 315th Shanethegamer 🇺🇸 0 72 27ms 9 Dec 2024 316th GolfingSuccess 🇬🇷 0 73 16ms 8 May 2025 316th GolfingSuccess 🇬🇷 0 73 8ms 46 hours ago 318th not-a-pokemon 0 74 15ms 2 days ago 319th Shanethegamer 🇺🇸 0 75 107ms 26 Nov 2024 319th sean-niemann 🇺🇸 0 75 106ms 8 May 2025 First Prev 241–320 of 480 Next Last