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 bytes. 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 Bytes Time Submitted 155th fuzzylojik-golf 🇺🇸 0 67 490ms 3 days ago 155th HumanoidCPU 0 67 577ms 2 days ago 155th madex 🇩🇪 0 67 9ms 9 hours ago 164th lifthrasiir 🇰🇷 0 68 559ms 11 Dec 2024 164th Shanethegamer 🇺🇸 0 68 257ms 13 Dec 2024 164th Yax42 🇫🇷 0 68 16ms 3 days ago 167th khvdm 0 69 137ms 13 Jan 2025 167th 4atj 0 69 1,062ms 21 May 2025 167th albanian-laundromat 0 69 533ms 6 Dec 2025 167th GolfingSuccess 🇬🇷 0 69 447ms 14 Jan 2026 167th albanian-laundromat 0 69 380ms 22 Feb 2026 167th error256 0 69 410ms 4 days ago 167th edsrzf 🇳🇿 0 69 394ms 2 days ago 174th btnlq 0 70 193ms 4 Dec 2024 174th error256 0 70 129ms 15 Jan 2026 174th error256 0 70 18ms 14 days ago 174th Seek64 🇩🇪 0 70 116ms 3 days ago 174th DialFrost 🇸🇬 0 70 116ms 25 hours ago 179th GolfingSuccess 🇬🇷 0 71 3ms 12 Jan 2026 179th GolfingSuccess 🇬🇷 0 71 24ms 12 Jan 2026 179th GolfingSuccess 🇬🇷 0 71 18ms 14 Jan 2026 179th ovs-code 🇩🇪 0 71 134ms 2 days ago 179th edsrzf 🇳🇿 0 71 18ms 2 days ago 179th kg583 🇺🇸 0 71 18ms 2 days ago 179th rhdqor213 0 71 4ms 2 days ago 179th ovs-code 🇩🇪 0 71 129ms 24 hours ago 187th dokutan 0 72 525ms 15 Aug 2025 187th rucin93 🇵🇱 0 72 9ms 20 days ago 187th aksyristos 0 72 247ms 15 days ago 187th blaztoma 🇱🇹 0 72 123ms 3 days ago 187th Emutis 🇱🇹 0 72 121ms 3 days ago 187th KasperKivimaeki 🇫🇮 0 72 4ms 2 days ago 187th edsrzf 🇳🇿 0 72 9ms 2 days ago 187th zacjl 0 72 131ms 36 hours ago 187th Steffan153 🇫🇮 0 72 3ms 26 hours ago 196th pardouin 🇫🇷 0 73 179ms 14 Feb 2026 196th Steffan153 🇫🇮 0 73 166ms 19 Feb 2026 198th saito-ta 🇯🇵 0 74 3ms 11 May 2025 198th error256 0 74 3ms 12 Jan 2026 198th lukegustafson 🇺🇸 0 74 189ms 18 days ago 198th albanian-laundromat 0 74 9ms 10 days ago 202nd kg583 🇺🇸 0 75 38ms 1 Dec 2024 202nd hallvabo 🇳🇴 0 75 131ms 30 Dec 2024 202nd Shanethegamer 🇺🇸 0 75 71ms 7 May 2025 202nd Natanaelel 🇸🇪 0 75 19ms 11 May 2025 202nd commandz0 🇺🇸 0 75 1,210ms 27 Aug 2025 202nd albanian-laundromat 0 75 108ms 5 Jan 2026 202nd albanian-laundromat 0 75 455ms 6 Jan 2026 202nd GolfingSuccess 🇬🇷 0 75 19ms 11 Jan 2026 202nd albanian-laundromat 0 75 238ms 24 days ago 202nd madex 🇩🇪 0 75 34ms 8 days ago 202nd CaedenHarper 🇨🇦 0 75 149ms 5 days ago 202nd fuzzylojik-golf 🇺🇸 0 75 123ms 3 days ago 202nd Yax42 🇫🇷 0 75 4ms 2 days ago 202nd edsrzf 🇳🇿 0 75 17ms 2 days ago 202nd plcc0 0 75 22ms 2 days ago 202nd zgialor-lab 0 75 25ms 47 hours ago 202nd ndren 0 75 19ms 22 hours ago 202nd madex 🇩🇪 0 75 439ms 9 hours ago 202nd CornerMercury 🇬🇧 0 75 19ms 6 mins ago 221st Shanethegamer 🇺🇸 0 76 129ms 13 Dec 2024 221st ovs-code 🇩🇪 0 76 3ms 10 May 2025 221st AlephSquirrel 0 76 43ms 3 Dec 2025 221st AlephSquirrel 0 76 445ms 3 Dec 2025 221st albanian-laundromat 0 76 18ms 24 days ago 221st albanian-laundromat 0 76 188ms 18 days ago 221st MeWhenI 🇻🇦 0 76 586ms 11 days ago 221st MeWhenI 🇻🇦 0 76 184ms 41 hours ago 221st duckyluuk 🇳🇱 0 76 128ms 25 hours ago 230th lifthrasiir 🇰🇷 0 77 192ms 11 Dec 2024 230th Shanethegamer 🇺🇸 0 77 19ms 13 Dec 2024 230th DialFrost 🇸🇬 0 77 18ms 8 May 2025 230th emgordon154 0 77 161ms 9 May 2025 230th Natanaelel 🇸🇪 0 77 3ms 11 May 2025 230th addmai 0 77 20ms 24 Jul 2025 230th hiichbindermax 0 77 19ms 17 Aug 2025 230th 5cw 🇺🇸 0 77 18ms 22 Aug 2025 230th davecame 0 77 135ms 25 Sep 2025 230th SirBogman 🇺🇸 0 77 232ms 13 Oct 2025 230th jtaxen 0 77 19ms 16 Oct 2025 First Prev 161–240 of 381 Next Last