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 81st GolfingSuccess 🇬🇷 0 41 16ms 8 Aug 2025 81st fuzzylojik-golf 🇺🇸 0 41 1,405ms 2 days ago 81st edsrzf 🇳🇿 0 41 1,468ms 18 hours ago 84th ovs-code 🇩🇪 0 42 81ms 30 May 2025 84th anter69 🇭🇺 0 42 1,272ms 42 hours ago 86th sean-niemann 🇺🇸 0 43 8ms 8 May 2025 86th targrik 0 43 9ms 3 Sep 2025 88th Shanethegamer 🇺🇸 0 44 12ms 10 Dec 2024 88th DialFrost 🇸🇬 0 44 11ms 24 Feb 2025 88th rucin93 🇵🇱 0 44 12ms 24 Feb 2025 88th error256 0 44 14ms 12 Apr 2025 88th GolfingSuccess 🇬🇷 0 44 9ms 8 May 2025 88th GolfingSuccess 🇬🇷 0 44 13ms 8 May 2025 88th Natanaelel 🇸🇪 0 44 12ms 8 May 2025 88th sean-niemann 🇺🇸 0 44 12ms 8 May 2025 88th edsrzf 🇳🇿 0 44 9ms 10 May 2025 88th 4atj 0 44 15ms 8 Jun 2025 88th lukegustafson 🇺🇸 0 44 14ms 16 Jun 2025 88th JOrE20 0 44 12ms 6 Dec 2025 88th voytxt 🇨🇿 0 44 12ms 6 Feb 2026 88th Steffan153 🇫🇮 0 44 16ms 19 Feb 2026 88th CaedenHarper 🇨🇦 0 44 14ms 3 days ago 88th fuzzylojik-golf 🇺🇸 0 44 11ms 2 days ago 88th fuzzylojik-golf 🇺🇸 0 44 9ms 2 days ago 88th Yax42 🇫🇷 0 44 12ms 44 hours ago 88th helbling 🇨🇭 0 44 12ms 43 hours ago 88th HumanoidCPU 0 44 15ms 29 hours ago 88th emgordon154 0 44 12ms 24 hours ago 88th MeWhenI 🇻🇦 0 44 14ms 19 hours ago 88th edsrzf 🇳🇿 0 44 13ms 18 hours ago 88th ComradeSquirrel 0 44 12ms 8 hours ago 112th Andrey-Plotnikov 0 45 12ms 10 Jan 2025 112th saito-ta 🇯🇵 0 45 555ms 10 May 2025 112th GolfingSuccess 🇬🇷 0 45 79ms 14 May 2025 112th XenThe 🇬🇧 0 45 14ms 15 Jul 2025 112th smclaughlin-cf 0 45 13ms 14 Oct 2025 112th albanian-laundromat 0 45 12ms 4 days ago 118th Shanethegamer 🇺🇸 0 46 377ms 26 Nov 2024 118th kg583 🇺🇸 0 46 458ms 1 Dec 2024 118th Shanethegamer 🇺🇸 0 46 527ms 10 Dec 2024 118th GolfingSuccess 🇬🇷 0 46 458ms 30 Dec 2024 118th pardouin 🇫🇷 0 46 416ms 24 Feb 2025 118th Shanethegamer 🇺🇸 0 46 8ms 30 Apr 2025 118th GolfingSuccess 🇬🇷 0 46 7ms 8 May 2025 118th rucin93 🇵🇱 0 46 8ms 11 May 2025 118th Steffan153 🇫🇮 0 46 376ms 27 days ago 118th fuzzylojik-golf 🇺🇸 0 46 409ms 2 days ago 118th edsrzf 🇳🇿 0 46 7ms 2 days ago 129th lifthrasiir 🇰🇷 0 47 416ms 11 Dec 2024 129th emgordon154 0 47 404ms 9 May 2025 129th LukeBridges 🇬🇧 0 47 11ms 2 days ago 132nd HumanoidCPU 0 48 1,424ms 27 hours ago 133rd plcc0 0 49 463ms 5 hours ago 134th antimon2 🇯🇵 0 50 288ms 16 Dec 2024 134th Shanethegamer 🇺🇸 0 50 315ms 1 Feb 2025 134th ovs-code 🇩🇪 0 50 448ms 23 Feb 2025 134th CaedenHarper 🇨🇦 0 50 733ms 4 days ago 134th Steffan153 🇫🇮 0 50 776ms 4 days ago 134th edsrzf 🇳🇿 0 50 872ms 4 days ago 134th GolfingSuccess 🇬🇷 0 50 765ms 3 days ago 134th DialFrost 🇸🇬 0 50 330ms 16 hours ago 142nd Shanethegamer 🇺🇸 0 51 5ms 30 Apr 2025 142nd GolfingSuccess 🇬🇷 0 51 157ms 8 May 2025 142nd rucin93 🇵🇱 0 51 159ms 8 May 2025 142nd Shanethegamer 🇺🇸 0 51 150ms 8 May 2025 142nd sean-niemann 🇺🇸 0 51 150ms 9 May 2025 142nd DialFrost 🇸🇬 0 51 302ms 8 Sep 2025 142nd HumanoidCPU 0 51 394ms 40 hours ago 142nd albanian-laundromat 0 51 5ms 33 hours ago 150th DialFrost 🇸🇬 0 52 461ms 17 Feb 2025 150th CaedenHarper 🇨🇦 0 52 530ms 4 days ago 152nd dokutan 0 53 426ms 15 Aug 2025 152nd MeWhenI 🇻🇦 0 53 393ms 21 Nov 2025 152nd albanian-laundromat 0 53 467ms 15 Jan 2026 152nd AlephSquirrel 0 53 383ms 3 days ago 156th Shanethegamer 🇺🇸 0 54 69ms 12 Dec 2024 156th error256 0 54 66ms 12 Apr 2025 156th albanian-laundromat 0 54 779ms 15 Jan 2026 156th GolfingSuccess 🇬🇷 0 54 71ms 3 days ago 156th dokutan 0 54 778ms 44 hours ago First Prev 81–160 of 423 Next Last