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 Decoder 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 154th HumanoidCPU 0 64 256ms 2 days ago 162nd Shanethegamer 🇺🇸 0 65 257ms 13 Dec 2024 162nd GolfingSuccess 🇬🇷 0 65 92ms 12 Jan 2026 162nd dokutan 0 65 359ms 14 Feb 2026 165th dokutan 0 66 19ms 18 Aug 2025 165th Yax42 🇫🇷 0 66 470ms 6 Jan 2026 165th AdrienHache 🇫🇷 0 66 430ms 6 Jan 2026 165th GolfingSuccess 🇬🇷 0 66 10ms 12 Jan 2026 165th edsrzf 🇳🇿 0 66 11ms 44 hours ago 165th Steffan153 🇫🇮 0 66 10ms 20 hours ago 171st Shanethegamer 🇺🇸 0 67 92ms 7 May 2025 171st Shanethegamer 🇺🇸 0 67 436ms 7 May 2025 171st namelessiw 0 67 407ms 2 Nov 2025 171st error256 0 67 111ms 30 Jan 2026 171st CaedenHarper 🇨🇦 0 67 553ms 5 days ago 171st fuzzylojik-golf 🇺🇸 0 67 490ms 3 days ago 177th Yax42 🇫🇷 0 68 16ms 2 days ago 178th 4atj 0 69 1,159ms 21 May 2025 178th GolfingSuccess 🇬🇷 0 69 447ms 14 Jan 2026 178th error256 0 69 410ms 4 days ago 178th edsrzf 🇳🇿 0 69 394ms 43 hours ago 182nd btnlq 0 70 193ms 4 Dec 2024 182nd error256 0 70 133ms 15 Jan 2026 182nd error256 0 70 18ms 13 days ago 182nd DialFrost 🇸🇬 0 70 116ms 10 hours ago 186th GolfingSuccess 🇬🇷 0 71 4ms 12 Jan 2026 186th GolfingSuccess 🇬🇷 0 71 24ms 12 Jan 2026 186th GolfingSuccess 🇬🇷 0 71 18ms 14 Jan 2026 186th ovs-code 🇩🇪 0 71 134ms 2 days ago 186th edsrzf 🇳🇿 0 71 18ms 2 days ago 186th kg583 🇺🇸 0 71 18ms 47 hours ago 186th rhdqor213 0 71 4ms 42 hours ago 186th ovs-code 🇩🇪 0 71 129ms 9 hours ago 194th rucin93 🇵🇱 0 72 9ms 19 days ago 194th aksyristos 0 72 247ms 15 days ago 194th blaztoma 🇱🇹 0 72 123ms 2 days ago 194th Emutis 🇱🇹 0 72 121ms 2 days ago 194th KasperKivimaeki 🇫🇮 0 72 4ms 2 days ago 194th edsrzf 🇳🇿 0 72 9ms 41 hours ago 194th zacjl 0 72 131ms 22 hours ago 194th Steffan153 🇫🇮 0 72 4ms 11 hours ago 202nd saito-ta 🇯🇵 0 74 3ms 11 May 2025 202nd error256 0 74 3ms 12 Jan 2026 202nd dokutan 0 74 65ms 8 Feb 2026 202nd lukegustafson 🇺🇸 0 74 189ms 17 days ago 202nd albanian-laundromat 0 74 9ms 9 days ago 207th Shanethegamer 🇺🇸 0 75 71ms 7 May 2025 207th Natanaelel 🇸🇪 0 75 19ms 11 May 2025 207th commandz0 🇺🇸 0 75 1,210ms 27 Aug 2025 207th albanian-laundromat 0 75 108ms 5 Jan 2026 207th albanian-laundromat 0 75 455ms 6 Jan 2026 207th GolfingSuccess 🇬🇷 0 75 19ms 11 Jan 2026 207th albanian-laundromat 0 75 238ms 24 days ago 207th madex 🇩🇪 0 75 25ms 8 days ago 207th CaedenHarper 🇨🇦 0 75 149ms 5 days ago 207th Yax42 🇫🇷 0 75 4ms 2 days ago 207th edsrzf 🇳🇿 0 75 17ms 41 hours ago 207th zgialor-lab 0 75 25ms 33 hours ago 219th Shanethegamer 🇺🇸 0 76 129ms 13 Dec 2024 219th ovs-code 🇩🇪 0 76 3ms 10 May 2025 219th AlephSquirrel 0 76 43ms 3 Dec 2025 219th AlephSquirrel 0 76 445ms 3 Dec 2025 219th albanian-laundromat 0 76 18ms 24 days ago 219th albanian-laundromat 0 76 188ms 17 days ago 219th MeWhenI 🇻🇦 0 76 586ms 10 days ago 219th MeWhenI 🇻🇦 0 76 184ms 27 hours ago 219th duckyluuk 🇳🇱 0 76 128ms 10 hours ago 228th Shanethegamer 🇺🇸 0 77 19ms 13 Dec 2024 228th DialFrost 🇸🇬 0 77 18ms 8 May 2025 228th Natanaelel 🇸🇪 0 77 3ms 11 May 2025 228th addmai 0 77 20ms 24 Jul 2025 228th hiichbindermax 0 77 19ms 17 Aug 2025 228th 5cw 🇺🇸 0 77 18ms 22 Aug 2025 228th davecame 0 77 135ms 25 Sep 2025 228th SirBogman 🇺🇸 0 77 240ms 13 Oct 2025 228th jtaxen 0 77 19ms 16 Oct 2025 228th albanian-laundromat 0 77 412ms 6 Dec 2025 228th Matter1024 🇮🇳 0 77 17ms 12 Feb 2026 228th KasperKivimaeki 🇫🇮 0 77 564ms 11 days ago 228th StefanHabel 🇨🇦 0 77 1,217ms 2 days ago First Prev 161–240 of 368 Next Last