The Gray Code Decoder and Gray Code Encoder holes will go live in approximately 4 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 152nd Steffan153 🇫🇮 0 50 290ms 21 hours ago 162nd Shanethegamer 🇺🇸 0 51 5ms 30 Apr 2025 162nd GolfingSuccess 🇬🇷 0 51 157ms 8 May 2025 162nd rucin93 🇵🇱 0 51 159ms 8 May 2025 162nd Shanethegamer 🇺🇸 0 51 150ms 8 May 2025 162nd sean-niemann 🇺🇸 0 51 150ms 9 May 2025 162nd DialFrost 🇸🇬 0 51 302ms 8 Sep 2025 162nd HumanoidCPU 0 51 394ms 2 days ago 162nd albanian-laundromat 0 51 5ms 2 days ago 162nd ovs-code 🇩🇪 0 51 19ms 28 hours ago 162nd Steffan153 🇫🇮 0 51 17ms 27 hours ago 162nd Steffan153 🇫🇮 0 51 124ms 23 hours ago 173rd DialFrost 🇸🇬 0 52 461ms 17 Feb 2025 173rd CaedenHarper 🇨🇦 0 52 530ms 6 days ago 175th dokutan 0 53 426ms 15 Aug 2025 175th MeWhenI 🇻🇦 0 53 360ms 21 Nov 2025 175th albanian-laundromat 0 53 467ms 15 Jan 2026 175th AlephSquirrel 0 53 383ms 5 days ago 179th Shanethegamer 🇺🇸 0 54 69ms 12 Dec 2024 179th error256 0 54 66ms 12 Apr 2025 179th albanian-laundromat 0 54 779ms 15 Jan 2026 179th GolfingSuccess 🇬🇷 0 54 71ms 4 days ago 179th dokutan 0 54 778ms 3 days ago 179th fuzzylojik-golf 🇺🇸 0 54 81ms 2 days ago 179th edsrzf 🇳🇿 0 54 70ms 35 hours ago 179th madex 🇩🇪 0 54 10ms 12 hours ago 187th albanian-laundromat 0 55 39ms 5 days ago 188th hallvabo 🇳🇴 0 56 15ms 29 Nov 2024 188th kg583 🇺🇸 0 56 16ms 1 Dec 2024 188th CornerMercury 🇬🇧 0 56 15ms 3 Dec 2024 188th ndren 0 56 16ms 3 Dec 2024 188th lifthrasiir 🇰🇷 0 56 37ms 11 Dec 2024 188th GolfingSuccess 🇬🇷 0 56 16ms 30 Dec 2024 188th khvdm 0 56 16ms 12 Jan 2025 188th pardouin 🇫🇷 0 56 16ms 24 Feb 2025 188th Shanethegamer 🇺🇸 0 56 66ms 30 Apr 2025 188th GolfingSuccess 🇬🇷 0 56 70ms 8 May 2025 188th sean-niemann 🇺🇸 0 56 67ms 8 May 2025 188th sean-niemann 🇺🇸 0 56 16ms 8 May 2025 188th emgordon154 0 56 16ms 9 May 2025 188th dokutan 0 56 16ms 18 Aug 2025 188th albanian-laundromat 0 56 16ms 2 Dec 2025 188th DialFrost 🇸🇬 0 56 2,628ms 16 Dec 2025 188th Steffan153 🇫🇮 0 56 16ms 21 Feb 2026 188th fuzzylojik-golf 🇺🇸 0 56 17ms 3 days ago 188th Seek64 🇩🇪 0 56 16ms 3 days ago 188th BREMAUCY 🇫🇷 0 56 16ms 3 days ago 188th HumanoidCPU 0 56 15ms 2 days ago 188th plcc0 0 56 17ms 2 days ago 210th Shanethegamer 🇺🇸 0 57 326ms 25 May 2025 210th sean-niemann 🇺🇸 0 57 176ms 25 May 2025 210th edsrzf 🇳🇿 0 57 167ms 25 May 2025 210th GolfingSuccess 🇬🇷 0 57 171ms 13 Dec 2025 210th Matter1024 🇮🇳 0 57 68ms 13 Feb 2026 210th albanian-laundromat 0 57 296ms 4 days ago 210th MeWhenI 🇻🇦 0 57 161ms 11 hours ago 217th GolfingSuccess 🇬🇷 0 58 4,218ms 8 May 2025 217th dokutan 0 58 189ms 2 days ago 219th GolfingSuccess 🇬🇷 0 59 17ms 8 May 2025 219th IanUtley 0 59 18ms 8 May 2025 219th GolfingSuccess 🇬🇷 0 59 63ms 8 May 2025 219th acollett89 0 59 13ms 3 hours ago 223rd pardouin 🇫🇷 0 60 2,725ms 15 Feb 2026 223rd fuzzylojik-golf 🇺🇸 0 60 16ms 3 days ago 223rd emgordon154 0 60 3,008ms 2 days ago 223rd edsrzf 🇳🇿 0 60 2,595ms 2 days ago 223rd fuzzylojik-golf 🇺🇸 0 60 2,673ms 2 days ago 228th GolfingSuccess 🇬🇷 0 61 2,438ms 8 May 2025 228th madex 🇩🇪 0 61 2,500ms 6 days ago 230th AlephSquirrel 0 62 15ms 25 Nov 2024 230th btnlq 0 62 15ms 4 Dec 2024 230th Shanethegamer 🇺🇸 0 62 16ms 10 Dec 2024 230th Artemis21 🇬🇧 0 62 16ms 24 Dec 2024 230th ovs-code 🇩🇪 0 62 15ms 5 Jan 2025 230th bricknellj 0 62 16ms 30 Jan 2025 230th DialFrost 🇸🇬 0 62 15ms 17 Feb 2025 230th error256 0 62 16ms 12 Apr 2025 230th MeWhenI 🇻🇦 0 62 14ms 8 May 2025 230th Shanethegamer 🇺🇸 0 62 2,495ms 8 May 2025 230th 4atj 0 62 16ms 9 May 2025 First Prev 161–240 of 481 Next Last