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 72nd 4atj 0 44 11ms 8 Jun 2025 72nd lukegustafson 🇺🇸 0 44 12ms 16 Jun 2025 72nd JOrE20 0 44 12ms 6 Dec 2025 72nd voytxt 🇨🇿 0 44 41ms 6 Feb 2026 72nd Steffan153 🇫🇮 0 44 28ms 19 Feb 2026 72nd CaedenHarper 🇨🇦 0 44 12ms 37 hours ago 72nd fuzzylojik-golf 🇺🇸 0 44 13ms 11 hours ago 72nd fuzzylojik-golf 🇺🇸 0 44 9ms 11 hours ago 89th Andrey-Plotnikov 0 45 12ms 10 Jan 2025 89th saito-ta 🇯🇵 0 45 555ms 10 May 2025 89th GolfingSuccess 🇬🇷 0 45 79ms 14 May 2025 89th XenThe 🇬🇧 0 45 12ms 15 Jul 2025 89th smclaughlin-cf 0 45 12ms 14 Oct 2025 89th albanian-laundromat 0 45 13ms 2 days ago 95th Shanethegamer 🇺🇸 0 46 377ms 26 Nov 2024 95th kg583 🇺🇸 0 46 458ms 1 Dec 2024 95th Shanethegamer 🇺🇸 0 46 527ms 10 Dec 2024 95th GolfingSuccess 🇬🇷 0 46 458ms 30 Dec 2024 95th pardouin 🇫🇷 0 46 416ms 24 Feb 2025 95th Shanethegamer 🇺🇸 0 46 8ms 30 Apr 2025 95th GolfingSuccess 🇬🇷 0 46 7ms 8 May 2025 95th rucin93 🇵🇱 0 46 8ms 11 May 2025 95th Steffan153 🇫🇮 0 46 376ms 25 days ago 95th fuzzylojik-golf 🇺🇸 0 46 409ms 14 hours ago 95th edsrzf 🇳🇿 0 46 7ms 14 hours ago 106th lifthrasiir 🇰🇷 0 47 416ms 11 Dec 2024 106th emgordon154 0 47 404ms 9 May 2025 108th antimon2 🇯🇵 0 50 288ms 16 Dec 2024 108th Shanethegamer 🇺🇸 0 50 315ms 1 Feb 2025 108th ovs-code 🇩🇪 0 50 448ms 23 Feb 2025 108th CaedenHarper 🇨🇦 0 50 733ms 2 days ago 108th Steffan153 🇫🇮 0 50 776ms 2 days ago 108th edsrzf 🇳🇿 0 50 872ms 2 days ago 108th GolfingSuccess 🇬🇷 0 50 765ms 37 hours ago 115th DialFrost 🇸🇬 0 51 269ms 24 Feb 2025 115th Shanethegamer 🇺🇸 0 51 5ms 30 Apr 2025 115th GolfingSuccess 🇬🇷 0 51 157ms 8 May 2025 115th rucin93 🇵🇱 0 51 159ms 8 May 2025 115th Shanethegamer 🇺🇸 0 51 150ms 8 May 2025 115th sean-niemann 🇺🇸 0 51 150ms 9 May 2025 115th DialFrost 🇸🇬 0 51 324ms 8 Sep 2025 122nd DialFrost 🇸🇬 0 52 474ms 17 Feb 2025 122nd CaedenHarper 🇨🇦 0 52 530ms 2 days ago 122nd albanian-laundromat 0 52 5ms 2 days ago 125th dokutan 0 53 426ms 15 Aug 2025 125th MeWhenI 🇻🇦 0 53 393ms 21 Nov 2025 125th albanian-laundromat 0 53 467ms 15 Jan 2026 125th AlephSquirrel 0 53 383ms 44 hours ago 129th Shanethegamer 🇺🇸 0 54 69ms 12 Dec 2024 129th error256 0 54 66ms 12 Apr 2025 129th albanian-laundromat 0 54 779ms 15 Jan 2026 129th GolfingSuccess 🇬🇷 0 54 71ms 38 hours ago 133rd albanian-laundromat 0 55 39ms 2 days ago 134th hallvabo 🇳🇴 0 56 15ms 29 Nov 2024 134th kg583 🇺🇸 0 56 16ms 1 Dec 2024 134th CornerMercury 🇬🇧 0 56 15ms 3 Dec 2024 134th ndren 0 56 16ms 3 Dec 2024 134th lifthrasiir 🇰🇷 0 56 37ms 11 Dec 2024 134th GolfingSuccess 🇬🇷 0 56 16ms 30 Dec 2024 134th khvdm 0 56 16ms 12 Jan 2025 134th pardouin 🇫🇷 0 56 16ms 24 Feb 2025 134th Shanethegamer 🇺🇸 0 56 66ms 30 Apr 2025 134th GolfingSuccess 🇬🇷 0 56 70ms 8 May 2025 134th sean-niemann 🇺🇸 0 56 67ms 8 May 2025 134th sean-niemann 🇺🇸 0 56 16ms 8 May 2025 134th emgordon154 0 56 16ms 9 May 2025 134th dokutan 0 56 16ms 18 Aug 2025 134th albanian-laundromat 0 56 16ms 2 Dec 2025 134th DialFrost 🇸🇬 0 56 2,628ms 16 Dec 2025 134th Steffan153 🇫🇮 0 56 16ms 21 Feb 2026 134th fuzzylojik-golf 🇺🇸 0 56 17ms 14 hours ago 134th Seek64 🇩🇪 0 56 16ms 6 hours ago 134th BREMAUCY 🇫🇷 0 56 16ms 4 hours ago 154th Shanethegamer 🇺🇸 0 57 326ms 25 May 2025 154th sean-niemann 🇺🇸 0 57 176ms 25 May 2025 154th edsrzf 🇳🇿 0 57 167ms 25 May 2025 154th GolfingSuccess 🇬🇷 0 57 171ms 13 Dec 2025 154th Matter1024 🇮🇳 0 57 68ms 13 Feb 2026 154th albanian-laundromat 0 57 296ms 24 hours ago 160th GolfingSuccess 🇬🇷 0 58 4,218ms 8 May 2025 First Prev 81–160 of 321 Next Last