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 239th tomh1012 0 63 15ms 42 hours ago 239th MeWhenI 🇻🇦 0 63 204ms 10 hours ago 243rd jameswmccarty 0 64 15ms 29 Mar 2025 243rd dokutan 0 64 63ms 8 Feb 2026 243rd albanian-laundromat 0 64 188ms 4 days ago 243rd zgialor-lab 0 64 16ms 12 hours ago 247th JDiLenarda 🇫🇷 0 65 1,378ms 15 hours ago 248th Shanethegamer 🇺🇸 0 66 1,317ms 26 Nov 2024 248th rucin93 🇵🇱 0 66 6ms 8 May 2025 248th sean-niemann 🇺🇸 0 66 7ms 8 May 2025 248th AdrienHache 🇫🇷 0 66 421ms 2 Nov 2025 248th namelessiw 0 66 434ms 2 Nov 2025 248th GolfingSuccess 🇬🇷 0 66 430ms 4 Feb 2026 248th albanian-laundromat 0 66 1,391ms 4 days ago 248th Yax42 🇫🇷 0 66 484ms 2 days ago 248th fuzzylojik-golf 🇺🇸 0 66 456ms 2 days ago 248th edsrzf 🇳🇿 0 66 7ms 25 hours ago 248th edsrzf 🇳🇿 0 66 1,345ms 8 hours ago 259th GolfingSuccess 🇬🇷 0 67 12ms 8 May 2025 259th tomh1012 0 67 429ms 42 hours ago 261st Shanethegamer 🇺🇸 0 68 145ms 26 Nov 2024 261st sean-niemann 🇺🇸 0 68 131ms 8 May 2025 261st edsrzf 🇳🇿 0 68 113ms 25 May 2025 261st GolfingSuccess 🇬🇷 0 68 110ms 3 days ago 261st fuzzylojik-golf 🇺🇸 0 68 1,320ms 14 hours ago 266th GolfingSuccess 🇬🇷 0 69 10ms 8 May 2025 266th CaedenHarper 🇨🇦 0 69 486ms 3 days ago 268th JOrE20 0 70 41ms 13 Feb 2026 269th kg583 🇺🇸 0 71 27ms 1 Dec 2024 269th CLOStrophobic 🇮🇹 0 71 13ms 18 Jan 2025 269th GolfingSuccess 🇬🇷 0 71 14ms 7 May 2025 269th edsrzf 🇳🇿 0 71 14ms 8 May 2025 269th AlephSquirrel 0 71 13ms 9 May 2025 274th Shanethegamer 🇺🇸 0 72 27ms 9 Dec 2024 275th GolfingSuccess 🇬🇷 0 73 16ms 8 May 2025 275th GolfingSuccess 🇬🇷 0 73 8ms 8 hours ago 277th not-a-pokemon 0 74 15ms 13 hours ago 278th Shanethegamer 🇺🇸 0 75 99ms 26 Nov 2024 278th sean-niemann 🇺🇸 0 75 103ms 8 May 2025 278th HumanoidCPU 0 75 112ms 18 hours ago 281st GolfingSuccess 🇬🇷 0 76 133ms 28 Nov 2025 281st fuzzylojik-golf 🇺🇸 0 76 99ms 2 days ago 281st edsrzf 🇳🇿 0 76 131ms 44 hours ago 281st emgordon154 0 76 115ms 25 hours ago 281st MeWhenI 🇻🇦 0 76 98ms 10 hours ago 286th rucin93 🇵🇱 0 77 130ms 8 May 2025 286th Shanethegamer 🇺🇸 0 77 146ms 12 Nov 2025 286th edsrzf 🇳🇿 0 77 7ms 10 hours ago 286th GolfingSuccess 🇬🇷 0 77 8ms 8 hours ago 290th saito-ta 🇯🇵 0 78 4ms 10 May 2025 290th rhdqor213 0 78 4ms 10 May 2025 290th albanian-laundromat 0 78 93ms 4 days ago 290th fuzzylojik-golf 🇺🇸 0 78 8ms 15 hours ago 290th edsrzf 🇳🇿 0 78 425ms 8 hours ago 295th sean-niemann 🇺🇸 0 80 455ms 8 May 2025 296th kumavale 0 81 156ms 26 Nov 2025 296th Matter1024 🇮🇳 0 81 45ms 14 Feb 2026 296th albanian-laundromat 0 81 45ms 4 days ago 296th fuzzylojik-golf 🇺🇸 0 81 9ms 15 hours ago 296th stefangimmillaro 0 81 46ms 2 hours ago 301st GolfingSuccess 🇬🇷 0 82 502ms 8 May 2025 301st emgordon154 0 82 159ms 14 Feb 2026 301st emgordon154 0 82 454ms 27 hours ago 301st edsrzf 🇳🇿 0 82 161ms 4 hours ago 305th Shanethegamer 🇺🇸 0 83 484ms 26 Nov 2024 305th Shanethegamer 🇺🇸 0 83 403ms 9 Jul 2025 305th fantaize 0 83 156ms 15 days ago 305th GolfingSuccess 🇬🇷 0 83 33ms 26 hours ago 305th MeWhenI 🇻🇦 0 83 229ms 17 hours ago 310th Shanethegamer 🇺🇸 0 84 416ms 26 Nov 2024 310th ovs-code 🇩🇪 0 84 12ms 10 May 2025 310th fuzzylojik-golf 🇺🇸 0 84 444ms 2 days ago 310th KasperKivimaeki 🇫🇮 0 84 12ms 12 hours ago 314th edsrzf 🇳🇿 0 85 42ms 8 May 2025 314th edsrzf 🇳🇿 0 85 18ms 9 May 2025 314th error256 0 85 18ms 10 May 2025 314th GolfingSuccess 🇬🇷 0 85 3ms 14 Jan 2026 314th HumanoidCPU 0 85 434ms 3 hours ago 319th Shanethegamer 🇺🇸 0 86 147ms 17 Dec 2024 319th kg583 🇺🇸 0 86 39ms 16 Feb 2025 First Prev 241–320 of 411 Next Last