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 241st Shanethegamer 🇺🇸 0 75 99ms 26 Nov 2024 241st sean-niemann 🇺🇸 0 75 103ms 8 May 2025 243rd GolfingSuccess 🇬🇷 0 76 133ms 28 Nov 2025 243rd fuzzylojik-golf 🇺🇸 0 76 104ms 22 hours ago 243rd edsrzf 🇳🇿 0 76 131ms 14 hours ago 246th rucin93 🇵🇱 0 77 130ms 8 May 2025 246th Shanethegamer 🇺🇸 0 77 146ms 12 Nov 2025 248th saito-ta 🇯🇵 0 78 4ms 10 May 2025 248th rhdqor213 0 78 4ms 10 May 2025 248th albanian-laundromat 0 78 100ms 2 days ago 251st sean-niemann 🇺🇸 0 80 455ms 8 May 2025 252nd kumavale 0 81 156ms 26 Nov 2025 252nd Matter1024 🇮🇳 0 81 45ms 14 Feb 2026 252nd albanian-laundromat 0 81 46ms 2 days ago 255th GolfingSuccess 🇬🇷 0 82 502ms 8 May 2025 255th emgordon154 0 82 162ms 14 Feb 2026 257th Shanethegamer 🇺🇸 0 83 484ms 26 Nov 2024 257th edsrzf 🇳🇿 0 83 414ms 9 Jul 2025 257th Shanethegamer 🇺🇸 0 83 403ms 9 Jul 2025 257th fantaize 0 83 156ms 14 days ago 261st Shanethegamer 🇺🇸 0 84 416ms 26 Nov 2024 261st ovs-code 🇩🇪 0 84 12ms 10 May 2025 261st fuzzylojik-golf 🇺🇸 0 84 444ms 22 hours ago 264th GolfingSuccess 🇬🇷 0 85 46ms 8 May 2025 264th edsrzf 🇳🇿 0 85 42ms 8 May 2025 264th edsrzf 🇳🇿 0 85 18ms 9 May 2025 264th error256 0 85 18ms 10 May 2025 264th GolfingSuccess 🇬🇷 0 85 3ms 14 Jan 2026 269th Shanethegamer 🇺🇸 0 86 147ms 17 Dec 2024 269th kg583 🇺🇸 0 86 39ms 16 Feb 2025 269th GolfingSuccess 🇬🇷 0 86 44ms 7 May 2025 269th GolfingSuccess 🇬🇷 0 86 2,431ms 8 May 2025 269th edsrzf 🇳🇿 0 86 155ms 9 May 2025 269th sean-niemann 🇺🇸 0 86 496ms 25 Sep 2025 269th GolfingSuccess 🇬🇷 0 86 8ms 12 Nov 2025 269th MeWhenI 🇻🇦 0 86 381ms 21 Nov 2025 269th GolfingSuccess 🇬🇷 0 86 399ms 12 Jan 2026 269th elgan65536 🇺🇸 0 86 168ms 23 days ago 269th CaedenHarper 🇨🇦 0 86 399ms 2 days ago 269th CaedenHarper 🇨🇦 0 86 153ms 46 hours ago 269th KasperKivimaeki 🇫🇮 0 86 12ms 112 mins ago 282nd Shanethegamer 🇺🇸 0 87 42ms 15 Apr 2025 282nd GolfingSuccess 🇬🇷 0 87 18ms 8 May 2025 282nd Shanethegamer 🇺🇸 0 87 20ms 8 May 2025 282nd albanian-laundromat 0 87 1,424ms 2 days ago 282nd Yax42 🇫🇷 0 87 2,511ms 5 hours ago 287th GolfingSuccess 🇬🇷 0 88 6ms 12 Nov 2025 287th kg583 🇺🇸 0 88 23ms 12 Feb 2026 287th fuzzylojik-golf 🇺🇸 0 88 152ms 20 hours ago 290th Shanethegamer 🇺🇸 0 89 341ms 6 May 2025 290th Shanethegamer 🇺🇸 0 89 511ms 24 Sep 2025 290th DialFrost 🇸🇬 0 89 367ms 21 Nov 2025 290th CaedenHarper 🇨🇦 0 89 103ms 47 hours ago 294th Yax42 🇫🇷 0 90 13ms 5 hours ago 295th GolfingSuccess 🇬🇷 0 91 14ms 13 Dec 2025 296th namelessiw 0 92 504ms 10 Oct 2025 296th fuzzylojik-golf 🇺🇸 0 92 390ms 21 hours ago 296th madex 🇩🇪 0 92 12ms 38 mins ago 299th edsrzf 🇳🇿 0 93 187ms 17 May 2025 299th CaedenHarper 🇨🇦 0 93 13ms 3 days ago 301st DialFrost 🇸🇬 0 94 13ms 10 May 2025 302nd Yax42 🇫🇷 0 95 389ms 5 hours ago 303rd GolfingSuccess 🇬🇷 0 96 182ms 7 May 2025 304th Shanethegamer 🇺🇸 0 98 7ms 6 May 2025 305th snydej 0 99 43ms 22 Nov 2024 305th albanian-laundromat 0 99 343ms 3 days ago 307th dokutan 0 100 370ms 5 hours ago 308th sean-niemann 🇺🇸 0 102 286ms 8 May 2025 308th Shanethegamer 🇺🇸 0 102 307ms 8 May 2025 308th edsrzf 🇳🇿 0 102 295ms 9 May 2025 308th GolfingSuccess 🇬🇷 0 102 306ms 9 May 2025 308th ovs-code 🇩🇪 0 102 311ms 13 Dec 2025 308th kg583 🇺🇸 0 102 13ms 25 Jan 2026 308th CaedenHarper 🇨🇦 0 102 301ms 3 days ago 308th fuzzylojik-golf 🇺🇸 0 102 292ms 22 hours ago 316th lukechampine 0 103 301ms 7 Jun 2025 316th chris124567 0 103 294ms 8 Jun 2025 316th albanian-laundromat 0 103 270ms 16 Dec 2025 316th GolfingSuccess 🇬🇷 0 103 336ms 14 Jan 2026 320th edsrzf 🇳🇿 0 104 17ms 5 hours ago First Prev 241–320 of 341 Next Last