The Gray Code Decoder and Gray Code Encoder holes will go live in approximately 7 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 71st lukegustafson 🇺🇸 0 44 12ms 16 Jun 2025 71st JOrE20 0 44 12ms 6 Dec 2025 71st voytxt 🇨🇿 0 44 41ms 6 Feb 2026 71st Steffan153 🇫🇮 0 44 28ms 19 Feb 2026 71st CaedenHarper 🇨🇦 0 44 12ms 35 hours ago 71st fuzzylojik-golf 🇺🇸 0 44 13ms 9 hours ago 71st fuzzylojik-golf 🇺🇸 0 44 9ms 9 hours ago 88th Andrey-Plotnikov 0 45 12ms 10 Jan 2025 88th saito-ta 🇯🇵 0 45 555ms 10 May 2025 88th GolfingSuccess 🇬🇷 0 45 79ms 14 May 2025 88th XenThe 🇬🇧 0 45 12ms 15 Jul 2025 88th smclaughlin-cf 0 45 12ms 14 Oct 2025 88th albanian-laundromat 0 45 13ms 2 days ago 94th Shanethegamer 🇺🇸 0 46 377ms 26 Nov 2024 94th kg583 🇺🇸 0 46 458ms 1 Dec 2024 94th Shanethegamer 🇺🇸 0 46 527ms 10 Dec 2024 94th GolfingSuccess 🇬🇷 0 46 458ms 30 Dec 2024 94th pardouin 🇫🇷 0 46 416ms 24 Feb 2025 94th Shanethegamer 🇺🇸 0 46 8ms 30 Apr 2025 94th GolfingSuccess 🇬🇷 0 46 7ms 8 May 2025 94th rucin93 🇵🇱 0 46 8ms 11 May 2025 94th Steffan153 🇫🇮 0 46 376ms 25 days ago 94th fuzzylojik-golf 🇺🇸 0 46 409ms 12 hours ago 94th edsrzf 🇳🇿 0 46 7ms 12 hours ago 105th lifthrasiir 🇰🇷 0 47 416ms 11 Dec 2024 105th emgordon154 0 47 404ms 9 May 2025 107th antimon2 🇯🇵 0 50 288ms 16 Dec 2024 107th Shanethegamer 🇺🇸 0 50 315ms 1 Feb 2025 107th ovs-code 🇩🇪 0 50 448ms 23 Feb 2025 107th CaedenHarper 🇨🇦 0 50 733ms 2 days ago 107th Steffan153 🇫🇮 0 50 776ms 2 days ago 107th edsrzf 🇳🇿 0 50 872ms 2 days ago 107th GolfingSuccess 🇬🇷 0 50 854ms 35 hours ago 114th DialFrost 🇸🇬 0 51 269ms 24 Feb 2025 114th Shanethegamer 🇺🇸 0 51 5ms 30 Apr 2025 114th GolfingSuccess 🇬🇷 0 51 157ms 8 May 2025 114th rucin93 🇵🇱 0 51 159ms 8 May 2025 114th Shanethegamer 🇺🇸 0 51 150ms 8 May 2025 114th sean-niemann 🇺🇸 0 51 150ms 9 May 2025 114th DialFrost 🇸🇬 0 51 324ms 8 Sep 2025 121st DialFrost 🇸🇬 0 52 474ms 17 Feb 2025 121st CaedenHarper 🇨🇦 0 52 530ms 2 days ago 121st albanian-laundromat 0 52 5ms 2 days ago 124th dokutan 0 53 426ms 15 Aug 2025 124th MeWhenI 🇻🇦 0 53 393ms 21 Nov 2025 124th albanian-laundromat 0 53 467ms 15 Jan 2026 124th AlephSquirrel 0 53 383ms 42 hours ago 128th Shanethegamer 🇺🇸 0 54 69ms 12 Dec 2024 128th error256 0 54 66ms 12 Apr 2025 128th albanian-laundromat 0 54 779ms 15 Jan 2026 128th GolfingSuccess 🇬🇷 0 54 71ms 36 hours ago 132nd albanian-laundromat 0 55 39ms 2 days ago 133rd hallvabo 🇳🇴 0 56 15ms 29 Nov 2024 133rd kg583 🇺🇸 0 56 16ms 1 Dec 2024 133rd CornerMercury 🇬🇧 0 56 15ms 3 Dec 2024 133rd ndren 0 56 16ms 3 Dec 2024 133rd lifthrasiir 🇰🇷 0 56 37ms 11 Dec 2024 133rd GolfingSuccess 🇬🇷 0 56 16ms 30 Dec 2024 133rd khvdm 0 56 16ms 12 Jan 2025 133rd pardouin 🇫🇷 0 56 16ms 24 Feb 2025 133rd Shanethegamer 🇺🇸 0 56 66ms 30 Apr 2025 133rd GolfingSuccess 🇬🇷 0 56 70ms 8 May 2025 133rd sean-niemann 🇺🇸 0 56 67ms 8 May 2025 133rd sean-niemann 🇺🇸 0 56 16ms 8 May 2025 133rd emgordon154 0 56 16ms 9 May 2025 133rd dokutan 0 56 16ms 18 Aug 2025 133rd albanian-laundromat 0 56 16ms 2 Dec 2025 133rd DialFrost 🇸🇬 0 56 2,628ms 16 Dec 2025 133rd Steffan153 🇫🇮 0 56 16ms 21 Feb 2026 133rd fuzzylojik-golf 🇺🇸 0 56 17ms 12 hours ago 133rd Seek64 🇩🇪 0 56 16ms 4 hours ago 133rd BREMAUCY 🇫🇷 0 56 16ms 2 hours ago 153rd Shanethegamer 🇺🇸 0 57 326ms 25 May 2025 153rd sean-niemann 🇺🇸 0 57 176ms 25 May 2025 153rd edsrzf 🇳🇿 0 57 167ms 25 May 2025 153rd GolfingSuccess 🇬🇷 0 57 171ms 13 Dec 2025 153rd Matter1024 🇮🇳 0 57 68ms 13 Feb 2026 153rd albanian-laundromat 0 57 296ms 22 hours ago 159th GolfingSuccess 🇬🇷 0 58 4,218ms 8 May 2025 160th GolfingSuccess 🇬🇷 0 59 17ms 8 May 2025 First Prev 81–160 of 320 Next Last