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 225th KasperKivimaeki 🇫🇮 0 62 15ms 20 Oct 2025 225th Matter1024 🇮🇳 0 62 15ms 12 Feb 2026 225th lukegustafson 🇺🇸 0 62 36ms 18 days ago 225th aksyristos 0 62 14ms 15 days ago 225th madex 🇩🇪 0 62 15ms 7 days ago 225th CaedenHarper 🇨🇦 0 62 16ms 5 days ago 225th KatieLG 🇬🇧 0 62 17ms 3 days ago 225th KatieLG 🇬🇧 0 62 416ms 3 days ago 225th scpchicken 🇵🇼 0 62 15ms 3 days ago 225th StefanHabel 🇨🇦 0 62 15ms 3 days ago 225th blaztoma 🇱🇹 0 62 15ms 3 days ago 225th Emutis 🇱🇹 0 62 16ms 2 days ago 225th Andrey2001 0 62 16ms 2 days ago 225th anter69 🇭🇺 0 62 15ms 2 days ago 225th qpwoeirut 0 62 17ms 2 days ago 225th stefangimmillaro 0 62 16ms 2 days ago 225th btjones0 0 62 15ms 2 days ago 225th bzijlema 🇳🇱 0 62 16ms 47 hours ago 225th ahmetdemirag 🇨🇾 0 62 15ms 44 hours ago 225th Pyroan 0 62 19ms 37 hours ago 225th edsrzf 🇳🇿 0 62 15ms 36 hours ago 225th zacjl 0 62 17ms 29 hours ago 225th MeWhenI 🇻🇦 0 62 86ms 28 hours ago 225th ComradeSquirrel 0 62 14ms 26 hours ago 225th duckyluuk 🇳🇱 0 62 15ms 20 hours ago 225th Aquateraneal 🇺🇸 0 62 15ms 9 hours ago 225th madex 🇩🇪 0 62 439ms 79 mins ago 225th madex 🇩🇪 0 62 1,125ms 74 mins ago 269th sean-niemann 🇺🇸 0 63 43ms 8 May 2025 269th albanian-laundromat 0 63 44ms 14 Jan 2026 269th tomh1012 0 63 15ms 2 days ago 269th MeWhenI 🇻🇦 0 63 204ms 37 hours ago 269th mishak-sys 0 63 15ms 19 hours ago 274th jameswmccarty 0 64 15ms 29 Mar 2025 274th dokutan 0 64 63ms 8 Feb 2026 274th albanian-laundromat 0 64 188ms 5 days ago 274th zgialor-lab 0 64 16ms 39 hours ago 278th JDiLenarda 🇫🇷 0 65 1,347ms 42 hours ago 279th Shanethegamer 🇺🇸 0 66 1,317ms 26 Nov 2024 279th rucin93 🇵🇱 0 66 6ms 8 May 2025 279th sean-niemann 🇺🇸 0 66 7ms 8 May 2025 279th AdrienHache 🇫🇷 0 66 421ms 2 Nov 2025 279th namelessiw 0 66 474ms 2 Nov 2025 279th GolfingSuccess 🇬🇷 0 66 430ms 4 Feb 2026 279th albanian-laundromat 0 66 1,345ms 5 days ago 279th Yax42 🇫🇷 0 66 484ms 3 days ago 279th fuzzylojik-golf 🇺🇸 0 66 456ms 3 days ago 279th edsrzf 🇳🇿 0 66 7ms 2 days ago 279th edsrzf 🇳🇿 0 66 1,345ms 35 hours ago 279th edsrzf 🇳🇿 0 66 451ms 24 hours ago 279th Steffan153 🇫🇮 0 66 480ms 17 hours ago 279th Steffan153 🇫🇮 0 66 7ms 12 hours ago 293rd GolfingSuccess 🇬🇷 0 67 12ms 8 May 2025 293rd tomh1012 0 67 429ms 2 days ago 295th Shanethegamer 🇺🇸 0 68 145ms 26 Nov 2024 295th sean-niemann 🇺🇸 0 68 131ms 8 May 2025 295th edsrzf 🇳🇿 0 68 113ms 25 May 2025 295th GolfingSuccess 🇬🇷 0 68 110ms 4 days ago 295th fuzzylojik-golf 🇺🇸 0 68 1,320ms 41 hours ago 295th Steffan153 🇫🇮 0 68 104ms 17 hours ago 301st GolfingSuccess 🇬🇷 0 69 10ms 8 May 2025 301st CaedenHarper 🇨🇦 0 69 486ms 4 days ago 303rd JOrE20 0 70 41ms 13 Feb 2026 304th kg583 🇺🇸 0 71 27ms 1 Dec 2024 304th CLOStrophobic 🇮🇹 0 71 13ms 18 Jan 2025 304th GolfingSuccess 🇬🇷 0 71 14ms 7 May 2025 304th edsrzf 🇳🇿 0 71 14ms 8 May 2025 304th AlephSquirrel 0 71 13ms 9 May 2025 309th Shanethegamer 🇺🇸 0 72 27ms 9 Dec 2024 310th GolfingSuccess 🇬🇷 0 73 16ms 8 May 2025 310th GolfingSuccess 🇬🇷 0 73 8ms 35 hours ago 312th not-a-pokemon 0 74 15ms 41 hours ago 313th Shanethegamer 🇺🇸 0 75 107ms 26 Nov 2024 313th sean-niemann 🇺🇸 0 75 106ms 8 May 2025 313th HumanoidCPU 0 75 110ms 45 hours ago 316th GolfingSuccess 🇬🇷 0 76 133ms 28 Nov 2025 316th fuzzylojik-golf 🇺🇸 0 76 99ms 3 days ago 316th edsrzf 🇳🇿 0 76 131ms 2 days ago 316th emgordon154 0 76 115ms 2 days ago 316th MeWhenI 🇻🇦 0 76 104ms 37 hours ago First Prev 241–320 of 467 Next Last