The Gray Code Decoder and Gray Code Encoder holes will go live in approximately 3 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 233rd MeWhenI 🇻🇦 0 62 14ms 8 May 2025 233rd Shanethegamer 🇺🇸 0 62 2,495ms 8 May 2025 233rd 4atj 0 62 16ms 9 May 2025 233rd Natanaelel 🇸🇪 0 62 16ms 11 May 2025 233rd hiichbindermax 0 62 18ms 17 Aug 2025 233rd 5cw 🇺🇸 0 62 15ms 22 Aug 2025 233rd commandz0 🇺🇸 0 62 15ms 27 Aug 2025 233rd SirBogman 🇺🇸 0 62 15ms 12 Oct 2025 233rd KasperKivimaeki 🇫🇮 0 62 15ms 20 Oct 2025 233rd Matter1024 🇮🇳 0 62 15ms 12 Feb 2026 233rd lukegustafson 🇺🇸 0 62 36ms 19 days ago 233rd aksyristos 0 62 14ms 16 days ago 233rd madex 🇩🇪 0 62 15ms 8 days ago 233rd CaedenHarper 🇨🇦 0 62 16ms 7 days ago 233rd KatieLG 🇬🇧 0 62 16ms 4 days ago 233rd KatieLG 🇬🇧 0 62 416ms 4 days ago 233rd scpchicken 🇵🇼 0 62 15ms 4 days ago 233rd StefanHabel 🇨🇦 0 62 15ms 4 days ago 233rd blaztoma 🇱🇹 0 62 15ms 4 days ago 233rd Emutis 🇱🇹 0 62 16ms 4 days ago 233rd Andrey2001 0 62 16ms 4 days ago 233rd anter69 🇭🇺 0 62 15ms 3 days ago 233rd qpwoeirut 0 62 17ms 3 days ago 233rd stefangimmillaro 0 62 16ms 3 days ago 233rd btjones0 0 62 15ms 3 days ago 233rd bzijlema 🇳🇱 0 62 16ms 3 days ago 233rd ahmetdemirag 🇨🇾 0 62 15ms 3 days ago 233rd Pyroan 0 62 19ms 2 days ago 233rd edsrzf 🇳🇿 0 62 15ms 2 days ago 233rd zacjl 0 62 17ms 2 days ago 233rd MeWhenI 🇻🇦 0 62 86ms 2 days ago 233rd ComradeSquirrel 0 62 14ms 2 days ago 233rd duckyluuk 🇳🇱 0 62 15ms 2 days ago 233rd Aquateraneal 🇺🇸 0 62 15ms 43 hours ago 233rd madex 🇩🇪 0 62 439ms 35 hours ago 233rd madex 🇩🇪 0 62 1,125ms 35 hours ago 233rd luuumine 🇫🇷 0 62 19ms 29 hours ago 278th sean-niemann 🇺🇸 0 63 43ms 8 May 2025 278th albanian-laundromat 0 63 44ms 14 Jan 2026 278th tomh1012 0 63 15ms 4 days ago 278th mishak-sys 0 63 15ms 2 days ago 282nd jameswmccarty 0 64 15ms 29 Mar 2025 282nd dokutan 0 64 63ms 8 Feb 2026 282nd albanian-laundromat 0 64 188ms 6 days ago 282nd zgialor-lab 0 64 16ms 3 days ago 286th JDiLenarda 🇫🇷 0 65 1,347ms 3 days ago 287th Shanethegamer 🇺🇸 0 66 1,317ms 26 Nov 2024 287th rucin93 🇵🇱 0 66 6ms 8 May 2025 287th sean-niemann 🇺🇸 0 66 7ms 8 May 2025 287th AdrienHache 🇫🇷 0 66 421ms 2 Nov 2025 287th namelessiw 0 66 474ms 2 Nov 2025 287th GolfingSuccess 🇬🇷 0 66 430ms 4 Feb 2026 287th albanian-laundromat 0 66 1,345ms 6 days ago 287th Yax42 🇫🇷 0 66 461ms 5 days ago 287th fuzzylojik-golf 🇺🇸 0 66 456ms 4 days ago 287th edsrzf 🇳🇿 0 66 7ms 3 days ago 287th edsrzf 🇳🇿 0 66 1,345ms 2 days ago 287th edsrzf 🇳🇿 0 66 451ms 2 days ago 287th Steffan153 🇫🇮 0 66 480ms 2 days ago 287th Steffan153 🇫🇮 0 66 7ms 46 hours ago 301st GolfingSuccess 🇬🇷 0 67 12ms 8 May 2025 301st tomh1012 0 67 429ms 4 days ago 301st msbranicky 0 67 16ms 31 hours ago 304th Shanethegamer 🇺🇸 0 68 145ms 26 Nov 2024 304th sean-niemann 🇺🇸 0 68 131ms 8 May 2025 304th edsrzf 🇳🇿 0 68 113ms 25 May 2025 304th GolfingSuccess 🇬🇷 0 68 110ms 5 days ago 304th fuzzylojik-golf 🇺🇸 0 68 1,320ms 3 days ago 304th Steffan153 🇫🇮 0 68 104ms 2 days ago 310th GolfingSuccess 🇬🇷 0 69 10ms 8 May 2025 310th CaedenHarper 🇨🇦 0 69 486ms 5 days ago 310th MeWhenI 🇻🇦 0 69 454ms 33 hours ago 313th JOrE20 0 70 41ms 13 Feb 2026 314th kg583 🇺🇸 0 71 27ms 1 Dec 2024 314th CLOStrophobic 🇮🇹 0 71 13ms 18 Jan 2025 314th GolfingSuccess 🇬🇷 0 71 14ms 7 May 2025 314th edsrzf 🇳🇿 0 71 14ms 8 May 2025 314th AlephSquirrel 0 71 13ms 9 May 2025 319th Shanethegamer 🇺🇸 0 72 27ms 9 Dec 2024 320th GolfingSuccess 🇬🇷 0 73 16ms 8 May 2025 First Prev 241–320 of 487 Next Last