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 226th SirBogman 🇺🇸 0 62 15ms 12 Oct 2025 226th KasperKivimaeki 🇫🇮 0 62 15ms 20 Oct 2025 226th Matter1024 🇮🇳 0 62 15ms 12 Feb 2026 226th lukegustafson 🇺🇸 0 62 36ms 18 days ago 226th aksyristos 0 62 14ms 15 days ago 226th madex 🇩🇪 0 62 15ms 7 days ago 226th CaedenHarper 🇨🇦 0 62 16ms 5 days ago 226th KatieLG 🇬🇧 0 62 17ms 3 days ago 226th KatieLG 🇬🇧 0 62 416ms 3 days ago 226th scpchicken 🇵🇼 0 62 15ms 3 days ago 226th StefanHabel 🇨🇦 0 62 15ms 3 days ago 226th blaztoma 🇱🇹 0 62 15ms 3 days ago 226th Emutis 🇱🇹 0 62 16ms 3 days ago 226th Andrey2001 0 62 16ms 3 days ago 226th anter69 🇭🇺 0 62 15ms 2 days ago 226th qpwoeirut 0 62 17ms 2 days ago 226th stefangimmillaro 0 62 16ms 2 days ago 226th btjones0 0 62 15ms 2 days ago 226th bzijlema 🇳🇱 0 62 16ms 2 days ago 226th ahmetdemirag 🇨🇾 0 62 15ms 2 days ago 226th Pyroan 0 62 19ms 44 hours ago 226th edsrzf 🇳🇿 0 62 15ms 43 hours ago 226th zacjl 0 62 17ms 36 hours ago 226th MeWhenI 🇻🇦 0 62 86ms 35 hours ago 226th ComradeSquirrel 0 62 14ms 33 hours ago 226th duckyluuk 🇳🇱 0 62 15ms 27 hours ago 226th Aquateraneal 🇺🇸 0 62 15ms 16 hours ago 226th madex 🇩🇪 0 62 439ms 8 hours ago 226th madex 🇩🇪 0 62 1,125ms 8 hours ago 226th luuumine 🇫🇷 0 62 19ms 2 hours ago 271st sean-niemann 🇺🇸 0 63 43ms 8 May 2025 271st albanian-laundromat 0 63 44ms 14 Jan 2026 271st tomh1012 0 63 15ms 3 days ago 271st mishak-sys 0 63 15ms 26 hours ago 275th jameswmccarty 0 64 15ms 29 Mar 2025 275th dokutan 0 64 63ms 8 Feb 2026 275th albanian-laundromat 0 64 188ms 5 days ago 275th zgialor-lab 0 64 16ms 47 hours ago 279th JDiLenarda 🇫🇷 0 65 1,347ms 2 days ago 280th Shanethegamer 🇺🇸 0 66 1,317ms 26 Nov 2024 280th rucin93 🇵🇱 0 66 6ms 8 May 2025 280th sean-niemann 🇺🇸 0 66 7ms 8 May 2025 280th AdrienHache 🇫🇷 0 66 421ms 2 Nov 2025 280th namelessiw 0 66 474ms 2 Nov 2025 280th GolfingSuccess 🇬🇷 0 66 430ms 4 Feb 2026 280th albanian-laundromat 0 66 1,345ms 5 days ago 280th Yax42 🇫🇷 0 66 461ms 4 days ago 280th fuzzylojik-golf 🇺🇸 0 66 456ms 3 days ago 280th edsrzf 🇳🇿 0 66 7ms 2 days ago 280th edsrzf 🇳🇿 0 66 1,345ms 42 hours ago 280th edsrzf 🇳🇿 0 66 451ms 31 hours ago 280th Steffan153 🇫🇮 0 66 480ms 24 hours ago 280th Steffan153 🇫🇮 0 66 7ms 19 hours ago 294th GolfingSuccess 🇬🇷 0 67 12ms 8 May 2025 294th tomh1012 0 67 429ms 3 days ago 294th msbranicky 0 67 16ms 4 hours ago 297th Shanethegamer 🇺🇸 0 68 145ms 26 Nov 2024 297th sean-niemann 🇺🇸 0 68 131ms 8 May 2025 297th edsrzf 🇳🇿 0 68 113ms 25 May 2025 297th GolfingSuccess 🇬🇷 0 68 110ms 4 days ago 297th fuzzylojik-golf 🇺🇸 0 68 1,320ms 2 days ago 297th Steffan153 🇫🇮 0 68 104ms 24 hours ago 303rd GolfingSuccess 🇬🇷 0 69 10ms 8 May 2025 303rd CaedenHarper 🇨🇦 0 69 486ms 4 days ago 303rd MeWhenI 🇻🇦 0 69 454ms 6 hours ago 306th JOrE20 0 70 41ms 13 Feb 2026 307th kg583 🇺🇸 0 71 27ms 1 Dec 2024 307th CLOStrophobic 🇮🇹 0 71 13ms 18 Jan 2025 307th GolfingSuccess 🇬🇷 0 71 14ms 7 May 2025 307th edsrzf 🇳🇿 0 71 14ms 8 May 2025 307th AlephSquirrel 0 71 13ms 9 May 2025 312th Shanethegamer 🇺🇸 0 72 27ms 9 Dec 2024 313th GolfingSuccess 🇬🇷 0 73 16ms 8 May 2025 313th GolfingSuccess 🇬🇷 0 73 8ms 42 hours ago 315th not-a-pokemon 0 74 15ms 2 days ago 316th Shanethegamer 🇺🇸 0 75 107ms 26 Nov 2024 316th sean-niemann 🇺🇸 0 75 106ms 8 May 2025 316th HumanoidCPU 0 75 110ms 2 days ago 316th MeWhenI 🇻🇦 0 75 102ms 6 hours ago 320th GolfingSuccess 🇬🇷 0 76 133ms 28 Nov 2025 First Prev 241–320 of 477 Next Last