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 69th voytxt 🇨🇿 0 44 41ms 6 Feb 2026 69th Steffan153 🇫🇮 0 44 28ms 19 Feb 2026 69th CaedenHarper 🇨🇦 0 44 12ms 32 hours ago 69th fuzzylojik-golf 🇺🇸 0 44 13ms 6 hours ago 69th fuzzylojik-golf 🇺🇸 0 44 9ms 6 hours ago 86th Andrey-Plotnikov 0 45 12ms 10 Jan 2025 86th saito-ta 🇯🇵 0 45 555ms 10 May 2025 86th GolfingSuccess 🇬🇷 0 45 79ms 14 May 2025 86th XenThe 🇬🇧 0 45 12ms 15 Jul 2025 86th smclaughlin-cf 0 45 12ms 14 Oct 2025 86th albanian-laundromat 0 45 13ms 2 days ago 92nd Shanethegamer 🇺🇸 0 46 377ms 26 Nov 2024 92nd kg583 🇺🇸 0 46 458ms 1 Dec 2024 92nd Shanethegamer 🇺🇸 0 46 527ms 10 Dec 2024 92nd GolfingSuccess 🇬🇷 0 46 458ms 30 Dec 2024 92nd pardouin 🇫🇷 0 46 416ms 24 Feb 2025 92nd Shanethegamer 🇺🇸 0 46 8ms 30 Apr 2025 92nd GolfingSuccess 🇬🇷 0 46 7ms 8 May 2025 92nd rucin93 🇵🇱 0 46 8ms 11 May 2025 92nd Steffan153 🇫🇮 0 46 376ms 25 days ago 92nd fuzzylojik-golf 🇺🇸 0 46 409ms 9 hours ago 92nd edsrzf 🇳🇿 0 46 7ms 9 hours ago 103rd lifthrasiir 🇰🇷 0 47 416ms 11 Dec 2024 103rd emgordon154 0 47 404ms 9 May 2025 105th antimon2 🇯🇵 0 50 288ms 16 Dec 2024 105th Shanethegamer 🇺🇸 0 50 315ms 1 Feb 2025 105th ovs-code 🇩🇪 0 50 448ms 23 Feb 2025 105th CaedenHarper 🇨🇦 0 50 733ms 2 days ago 105th Steffan153 🇫🇮 0 50 776ms 2 days ago 105th edsrzf 🇳🇿 0 50 872ms 2 days ago 105th GolfingSuccess 🇬🇷 0 50 854ms 33 hours ago 112th DialFrost 🇸🇬 0 51 269ms 24 Feb 2025 112th Shanethegamer 🇺🇸 0 51 5ms 30 Apr 2025 112th GolfingSuccess 🇬🇷 0 51 157ms 8 May 2025 112th rucin93 🇵🇱 0 51 159ms 8 May 2025 112th Shanethegamer 🇺🇸 0 51 150ms 8 May 2025 112th sean-niemann 🇺🇸 0 51 150ms 9 May 2025 112th DialFrost 🇸🇬 0 51 324ms 8 Sep 2025 119th DialFrost 🇸🇬 0 52 474ms 17 Feb 2025 119th CaedenHarper 🇨🇦 0 52 530ms 2 days ago 119th albanian-laundromat 0 52 5ms 2 days ago 122nd dokutan 0 53 426ms 15 Aug 2025 122nd MeWhenI 🇻🇦 0 53 393ms 21 Nov 2025 122nd albanian-laundromat 0 53 467ms 15 Jan 2026 122nd AlephSquirrel 0 53 383ms 39 hours ago 126th Shanethegamer 🇺🇸 0 54 69ms 12 Dec 2024 126th error256 0 54 66ms 12 Apr 2025 126th albanian-laundromat 0 54 779ms 15 Jan 2026 126th GolfingSuccess 🇬🇷 0 54 71ms 33 hours ago 130th albanian-laundromat 0 55 39ms 2 days ago 131st hallvabo 🇳🇴 0 56 15ms 29 Nov 2024 131st kg583 🇺🇸 0 56 16ms 1 Dec 2024 131st CornerMercury 🇬🇧 0 56 15ms 3 Dec 2024 131st ndren 0 56 16ms 3 Dec 2024 131st lifthrasiir 🇰🇷 0 56 37ms 11 Dec 2024 131st GolfingSuccess 🇬🇷 0 56 16ms 30 Dec 2024 131st khvdm 0 56 16ms 12 Jan 2025 131st pardouin 🇫🇷 0 56 16ms 24 Feb 2025 131st Shanethegamer 🇺🇸 0 56 66ms 30 Apr 2025 131st GolfingSuccess 🇬🇷 0 56 70ms 8 May 2025 131st sean-niemann 🇺🇸 0 56 67ms 8 May 2025 131st sean-niemann 🇺🇸 0 56 16ms 8 May 2025 131st emgordon154 0 56 16ms 9 May 2025 131st dokutan 0 56 16ms 18 Aug 2025 131st albanian-laundromat 0 56 16ms 2 Dec 2025 131st DialFrost 🇸🇬 0 56 2,628ms 16 Dec 2025 131st Steffan153 🇫🇮 0 56 16ms 21 Feb 2026 131st fuzzylojik-golf 🇺🇸 0 56 17ms 10 hours ago 131st Seek64 🇩🇪 0 56 16ms 94 mins ago 131st BREMAUCY 🇫🇷 0 56 16ms a min ago 151st Shanethegamer 🇺🇸 0 57 326ms 25 May 2025 151st sean-niemann 🇺🇸 0 57 176ms 25 May 2025 151st edsrzf 🇳🇿 0 57 167ms 25 May 2025 151st GolfingSuccess 🇬🇷 0 57 171ms 13 Dec 2025 151st Matter1024 🇮🇳 0 57 68ms 13 Feb 2026 151st albanian-laundromat 0 57 296ms 19 hours ago 157th GolfingSuccess 🇬🇷 0 58 4,218ms 8 May 2025 158th GolfingSuccess 🇬🇷 0 59 17ms 8 May 2025 158th IanUtley 0 59 18ms 8 May 2025 158th GolfingSuccess 🇬🇷 0 59 63ms 8 May 2025 First Prev 81–160 of 315 Next Last