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 154th HumanoidCPU 0 67 577ms 2 days ago 154th madex 🇩🇪 0 67 9ms 20 mins ago 163rd lifthrasiir 🇰🇷 0 68 559ms 11 Dec 2024 163rd Shanethegamer 🇺🇸 0 68 257ms 13 Dec 2024 163rd Yax42 🇫🇷 0 68 16ms 2 days ago 166th khvdm 0 69 137ms 13 Jan 2025 166th 4atj 0 69 1,062ms 21 May 2025 166th albanian-laundromat 0 69 533ms 6 Dec 2025 166th GolfingSuccess 🇬🇷 0 69 447ms 14 Jan 2026 166th albanian-laundromat 0 69 380ms 22 Feb 2026 166th error256 0 69 410ms 4 days ago 166th edsrzf 🇳🇿 0 69 394ms 2 days ago 173rd btnlq 0 70 193ms 4 Dec 2024 173rd error256 0 70 129ms 15 Jan 2026 173rd error256 0 70 18ms 13 days ago 173rd Seek64 🇩🇪 0 70 116ms 2 days ago 173rd DialFrost 🇸🇬 0 70 116ms 16 hours ago 178th GolfingSuccess 🇬🇷 0 71 3ms 12 Jan 2026 178th GolfingSuccess 🇬🇷 0 71 24ms 12 Jan 2026 178th GolfingSuccess 🇬🇷 0 71 18ms 14 Jan 2026 178th ovs-code 🇩🇪 0 71 134ms 2 days ago 178th edsrzf 🇳🇿 0 71 18ms 2 days ago 178th kg583 🇺🇸 0 71 18ms 2 days ago 178th rhdqor213 0 71 4ms 2 days ago 178th ovs-code 🇩🇪 0 71 129ms 15 hours ago 186th dokutan 0 72 525ms 15 Aug 2025 186th rucin93 🇵🇱 0 72 9ms 19 days ago 186th aksyristos 0 72 247ms 15 days ago 186th blaztoma 🇱🇹 0 72 123ms 2 days ago 186th Emutis 🇱🇹 0 72 121ms 2 days ago 186th KasperKivimaeki 🇫🇮 0 72 4ms 2 days ago 186th edsrzf 🇳🇿 0 72 9ms 46 hours ago 186th zacjl 0 72 131ms 27 hours ago 186th Steffan153 🇫🇮 0 72 3ms 17 hours ago 195th pardouin 🇫🇷 0 73 179ms 14 Feb 2026 195th Steffan153 🇫🇮 0 73 166ms 19 Feb 2026 197th saito-ta 🇯🇵 0 74 3ms 11 May 2025 197th error256 0 74 3ms 12 Jan 2026 197th lukegustafson 🇺🇸 0 74 189ms 18 days ago 197th albanian-laundromat 0 74 9ms 10 days ago 201st kg583 🇺🇸 0 75 38ms 1 Dec 2024 201st hallvabo 🇳🇴 0 75 131ms 30 Dec 2024 201st Shanethegamer 🇺🇸 0 75 71ms 7 May 2025 201st Natanaelel 🇸🇪 0 75 19ms 11 May 2025 201st commandz0 🇺🇸 0 75 1,210ms 27 Aug 2025 201st albanian-laundromat 0 75 108ms 5 Jan 2026 201st albanian-laundromat 0 75 455ms 6 Jan 2026 201st GolfingSuccess 🇬🇷 0 75 19ms 11 Jan 2026 201st albanian-laundromat 0 75 238ms 24 days ago 201st madex 🇩🇪 0 75 34ms 8 days ago 201st CaedenHarper 🇨🇦 0 75 149ms 5 days ago 201st fuzzylojik-golf 🇺🇸 0 75 123ms 3 days ago 201st Yax42 🇫🇷 0 75 4ms 2 days ago 201st edsrzf 🇳🇿 0 75 17ms 47 hours ago 201st plcc0 0 75 22ms 41 hours ago 201st zgialor-lab 0 75 25ms 38 hours ago 201st ndren 0 75 19ms 13 hours ago 201st madex 🇩🇪 0 75 439ms 18 mins 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 18 days ago 219th MeWhenI 🇻🇦 0 76 586ms 11 days ago 219th MeWhenI 🇻🇦 0 76 184ms 32 hours ago 219th duckyluuk 🇳🇱 0 76 128ms 16 hours ago 228th CornerMercury 🇬🇧 0 77 18ms 3 Dec 2024 228th lifthrasiir 🇰🇷 0 77 192ms 11 Dec 2024 228th Shanethegamer 🇺🇸 0 77 19ms 13 Dec 2024 228th DialFrost 🇸🇬 0 77 18ms 8 May 2025 228th emgordon154 0 77 161ms 9 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 232ms 13 Oct 2025 228th jtaxen 0 77 19ms 16 Oct 2025 228th albanian-laundromat 0 77 19ms 25 Nov 2025 First Prev 161–240 of 378 Next Last