The Gray Code Decoder and Gray Code Encoder holes will go live in approximately 5 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 212th Andrey2001 0 62 16ms 2 days ago 212th anter69 🇭🇺 0 62 15ms 47 hours ago 212th qpwoeirut 0 62 17ms 39 hours ago 212th stefangimmillaro 0 62 16ms 38 hours ago 212th btjones0 0 62 15ms 36 hours ago 212th bzijlema 🇳🇱 0 62 16ms 33 hours ago 212th ahmetdemirag 🇨🇾 0 62 15ms 30 hours ago 212th Pyroan 0 62 19ms 23 hours ago 212th edsrzf 🇳🇿 0 62 15ms 22 hours ago 212th zacjl 0 62 17ms 15 hours ago 212th MeWhenI 🇻🇦 0 62 86ms 13 hours ago 212th ComradeSquirrel 0 62 14ms 12 hours ago 212th duckyluuk 🇳🇱 0 62 15ms 6 hours ago 254th sean-niemann 🇺🇸 0 63 43ms 8 May 2025 254th albanian-laundromat 0 63 44ms 14 Jan 2026 254th tomh1012 0 63 15ms 2 days ago 254th MeWhenI 🇻🇦 0 63 204ms 23 hours ago 254th mishak-sys 0 63 15ms 5 hours ago 259th jameswmccarty 0 64 15ms 29 Mar 2025 259th dokutan 0 64 63ms 8 Feb 2026 259th albanian-laundromat 0 64 188ms 4 days ago 259th zgialor-lab 0 64 16ms 25 hours ago 263rd JDiLenarda 🇫🇷 0 65 1,347ms 28 hours ago 264th Shanethegamer 🇺🇸 0 66 1,317ms 26 Nov 2024 264th rucin93 🇵🇱 0 66 6ms 8 May 2025 264th sean-niemann 🇺🇸 0 66 7ms 8 May 2025 264th AdrienHache 🇫🇷 0 66 421ms 2 Nov 2025 264th namelessiw 0 66 474ms 2 Nov 2025 264th GolfingSuccess 🇬🇷 0 66 430ms 4 Feb 2026 264th albanian-laundromat 0 66 1,345ms 4 days ago 264th Yax42 🇫🇷 0 66 484ms 3 days ago 264th fuzzylojik-golf 🇺🇸 0 66 456ms 2 days ago 264th edsrzf 🇳🇿 0 66 7ms 38 hours ago 264th edsrzf 🇳🇿 0 66 1,345ms 21 hours ago 264th edsrzf 🇳🇿 0 66 451ms 9 hours ago 264th Steffan153 🇫🇮 0 66 480ms 3 hours ago 277th GolfingSuccess 🇬🇷 0 67 12ms 8 May 2025 277th tomh1012 0 67 429ms 2 days ago 279th Shanethegamer 🇺🇸 0 68 145ms 26 Nov 2024 279th sean-niemann 🇺🇸 0 68 131ms 8 May 2025 279th edsrzf 🇳🇿 0 68 113ms 25 May 2025 279th GolfingSuccess 🇬🇷 0 68 110ms 3 days ago 279th fuzzylojik-golf 🇺🇸 0 68 1,320ms 27 hours ago 279th Steffan153 🇫🇮 0 68 104ms 3 hours ago 285th GolfingSuccess 🇬🇷 0 69 10ms 8 May 2025 285th CaedenHarper 🇨🇦 0 69 486ms 3 days ago 287th JOrE20 0 70 41ms 13 Feb 2026 288th kg583 🇺🇸 0 71 27ms 1 Dec 2024 288th CLOStrophobic 🇮🇹 0 71 13ms 18 Jan 2025 288th GolfingSuccess 🇬🇷 0 71 14ms 7 May 2025 288th edsrzf 🇳🇿 0 71 14ms 8 May 2025 288th AlephSquirrel 0 71 13ms 9 May 2025 293rd Shanethegamer 🇺🇸 0 72 27ms 9 Dec 2024 294th GolfingSuccess 🇬🇷 0 73 16ms 8 May 2025 294th GolfingSuccess 🇬🇷 0 73 8ms 21 hours ago 296th not-a-pokemon 0 74 15ms 26 hours ago 297th Shanethegamer 🇺🇸 0 75 99ms 26 Nov 2024 297th sean-niemann 🇺🇸 0 75 103ms 8 May 2025 297th HumanoidCPU 0 75 112ms 31 hours ago 300th GolfingSuccess 🇬🇷 0 76 133ms 28 Nov 2025 300th fuzzylojik-golf 🇺🇸 0 76 99ms 2 days ago 300th edsrzf 🇳🇿 0 76 131ms 2 days ago 300th emgordon154 0 76 115ms 38 hours ago 300th MeWhenI 🇻🇦 0 76 98ms 23 hours ago 305th rucin93 🇵🇱 0 77 130ms 8 May 2025 305th Shanethegamer 🇺🇸 0 77 146ms 12 Nov 2025 305th edsrzf 🇳🇿 0 77 7ms 23 hours ago 305th GolfingSuccess 🇬🇷 0 77 8ms 21 hours ago 309th saito-ta 🇯🇵 0 78 4ms 10 May 2025 309th rhdqor213 0 78 4ms 10 May 2025 309th albanian-laundromat 0 78 93ms 4 days ago 309th fuzzylojik-golf 🇺🇸 0 78 8ms 28 hours ago 309th edsrzf 🇳🇿 0 78 425ms 21 hours ago 314th sean-niemann 🇺🇸 0 80 455ms 8 May 2025 315th kumavale 0 81 156ms 26 Nov 2025 315th Matter1024 🇮🇳 0 81 45ms 14 Feb 2026 315th albanian-laundromat 0 81 45ms 4 days ago 315th fuzzylojik-golf 🇺🇸 0 81 9ms 28 hours ago 315th stefangimmillaro 0 81 46ms 15 hours ago 320th GolfingSuccess 🇬🇷 0 82 502ms 8 May 2025 First Prev 241–320 of 439 Next Last