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 201st ComradeSquirrel 0 62 14ms 15 mins ago 242nd sean-niemann 🇺🇸 0 63 43ms 8 May 2025 242nd albanian-laundromat 0 63 44ms 14 Jan 2026 242nd tomh1012 0 63 15ms 43 hours ago 242nd MeWhenI 🇻🇦 0 63 204ms 11 hours ago 246th jameswmccarty 0 64 15ms 29 Mar 2025 246th dokutan 0 64 63ms 8 Feb 2026 246th albanian-laundromat 0 64 188ms 4 days ago 246th zgialor-lab 0 64 16ms 13 hours ago 250th JDiLenarda 🇫🇷 0 65 1,378ms 16 hours ago 251st Shanethegamer 🇺🇸 0 66 1,317ms 26 Nov 2024 251st rucin93 🇵🇱 0 66 6ms 8 May 2025 251st sean-niemann 🇺🇸 0 66 7ms 8 May 2025 251st AdrienHache 🇫🇷 0 66 421ms 2 Nov 2025 251st namelessiw 0 66 434ms 2 Nov 2025 251st GolfingSuccess 🇬🇷 0 66 430ms 4 Feb 2026 251st albanian-laundromat 0 66 1,391ms 4 days ago 251st Yax42 🇫🇷 0 66 484ms 2 days ago 251st fuzzylojik-golf 🇺🇸 0 66 456ms 2 days ago 251st edsrzf 🇳🇿 0 66 7ms 26 hours ago 251st edsrzf 🇳🇿 0 66 1,345ms 9 hours ago 262nd GolfingSuccess 🇬🇷 0 67 12ms 8 May 2025 262nd tomh1012 0 67 429ms 43 hours ago 264th Shanethegamer 🇺🇸 0 68 145ms 26 Nov 2024 264th sean-niemann 🇺🇸 0 68 131ms 8 May 2025 264th edsrzf 🇳🇿 0 68 113ms 25 May 2025 264th GolfingSuccess 🇬🇷 0 68 110ms 3 days ago 264th fuzzylojik-golf 🇺🇸 0 68 1,320ms 15 hours ago 269th GolfingSuccess 🇬🇷 0 69 10ms 8 May 2025 269th CaedenHarper 🇨🇦 0 69 486ms 3 days ago 271st JOrE20 0 70 41ms 13 Feb 2026 272nd kg583 🇺🇸 0 71 27ms 1 Dec 2024 272nd CLOStrophobic 🇮🇹 0 71 13ms 18 Jan 2025 272nd GolfingSuccess 🇬🇷 0 71 14ms 7 May 2025 272nd edsrzf 🇳🇿 0 71 14ms 8 May 2025 272nd AlephSquirrel 0 71 13ms 9 May 2025 277th Shanethegamer 🇺🇸 0 72 27ms 9 Dec 2024 278th GolfingSuccess 🇬🇷 0 73 16ms 8 May 2025 278th GolfingSuccess 🇬🇷 0 73 8ms 9 hours ago 280th not-a-pokemon 0 74 15ms 14 hours ago 281st Shanethegamer 🇺🇸 0 75 99ms 26 Nov 2024 281st sean-niemann 🇺🇸 0 75 103ms 8 May 2025 281st HumanoidCPU 0 75 112ms 19 hours ago 284th GolfingSuccess 🇬🇷 0 76 133ms 28 Nov 2025 284th fuzzylojik-golf 🇺🇸 0 76 99ms 2 days ago 284th edsrzf 🇳🇿 0 76 131ms 45 hours ago 284th emgordon154 0 76 115ms 26 hours ago 284th MeWhenI 🇻🇦 0 76 98ms 11 hours ago 289th rucin93 🇵🇱 0 77 130ms 8 May 2025 289th Shanethegamer 🇺🇸 0 77 146ms 12 Nov 2025 289th edsrzf 🇳🇿 0 77 7ms 11 hours ago 289th GolfingSuccess 🇬🇷 0 77 8ms 9 hours ago 293rd saito-ta 🇯🇵 0 78 4ms 10 May 2025 293rd rhdqor213 0 78 4ms 10 May 2025 293rd albanian-laundromat 0 78 93ms 4 days ago 293rd fuzzylojik-golf 🇺🇸 0 78 8ms 16 hours ago 293rd edsrzf 🇳🇿 0 78 425ms 9 hours ago 298th sean-niemann 🇺🇸 0 80 455ms 8 May 2025 299th kumavale 0 81 156ms 26 Nov 2025 299th Matter1024 🇮🇳 0 81 45ms 14 Feb 2026 299th albanian-laundromat 0 81 45ms 4 days ago 299th fuzzylojik-golf 🇺🇸 0 81 9ms 16 hours ago 299th stefangimmillaro 0 81 46ms 3 hours ago 304th GolfingSuccess 🇬🇷 0 82 502ms 8 May 2025 304th emgordon154 0 82 159ms 14 Feb 2026 304th emgordon154 0 82 454ms 27 hours ago 304th edsrzf 🇳🇿 0 82 161ms 5 hours ago 308th Shanethegamer 🇺🇸 0 83 484ms 26 Nov 2024 308th Shanethegamer 🇺🇸 0 83 403ms 9 Jul 2025 308th fantaize 0 83 156ms 15 days ago 308th GolfingSuccess 🇬🇷 0 83 33ms 27 hours ago 308th MeWhenI 🇻🇦 0 83 229ms 18 hours ago 313th Shanethegamer 🇺🇸 0 84 416ms 26 Nov 2024 313th ovs-code 🇩🇪 0 84 12ms 10 May 2025 313th fuzzylojik-golf 🇺🇸 0 84 444ms 2 days ago 313th KasperKivimaeki 🇫🇮 0 84 12ms 12 hours ago 317th edsrzf 🇳🇿 0 85 42ms 8 May 2025 317th edsrzf 🇳🇿 0 85 18ms 9 May 2025 317th error256 0 85 18ms 10 May 2025 317th GolfingSuccess 🇬🇷 0 85 3ms 14 Jan 2026 First Prev 241–320 of 415 Next Last