The Gray Code Decoder and Gray Code Encoder holes will go live in approximately 6 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 161st kg583 🇺🇸 0 75 38ms 1 Dec 2024 161st hallvabo 🇳🇴 0 75 131ms 30 Dec 2024 161st Shanethegamer 🇺🇸 0 75 71ms 7 May 2025 161st Natanaelel 🇸🇪 0 75 19ms 11 May 2025 161st commandz0 🇺🇸 0 75 1,210ms 27 Aug 2025 161st albanian-laundromat 0 75 108ms 5 Jan 2026 161st albanian-laundromat 0 75 455ms 6 Jan 2026 161st GolfingSuccess 🇬🇷 0 75 18ms 11 Jan 2026 161st albanian-laundromat 0 75 238ms 22 days ago 161st madex 🇩🇪 0 75 18ms 6 days ago 161st CaedenHarper 🇨🇦 0 75 149ms 3 days ago 161st fuzzylojik-golf 🇺🇸 0 75 123ms 26 hours ago 161st Yax42 🇫🇷 0 75 4ms 7 hours ago 174th Shanethegamer 🇺🇸 0 76 129ms 13 Dec 2024 174th edsrzf 🇳🇿 0 76 114ms 10 May 2025 174th ovs-code 🇩🇪 0 76 3ms 10 May 2025 174th AlephSquirrel 0 76 43ms 3 Dec 2025 174th AlephSquirrel 0 76 445ms 3 Dec 2025 174th albanian-laundromat 0 76 18ms 22 days ago 174th albanian-laundromat 0 76 188ms 15 days ago 174th MeWhenI 🇻🇦 0 76 586ms 8 days ago 182nd CornerMercury 🇬🇧 0 77 18ms 3 Dec 2024 182nd ndren 0 77 20ms 3 Dec 2024 182nd lifthrasiir 🇰🇷 0 77 192ms 11 Dec 2024 182nd Shanethegamer 🇺🇸 0 77 19ms 13 Dec 2024 182nd DialFrost 🇸🇬 0 77 19ms 8 May 2025 182nd emgordon154 0 77 161ms 9 May 2025 182nd edsrzf 🇳🇿 0 77 1,938ms 9 May 2025 182nd Natanaelel 🇸🇪 0 77 3ms 11 May 2025 182nd addmai 0 77 20ms 24 Jul 2025 182nd hiichbindermax 0 77 19ms 17 Aug 2025 182nd 5cw 🇺🇸 0 77 18ms 22 Aug 2025 182nd davecame 0 77 150ms 25 Sep 2025 182nd SirBogman 🇺🇸 0 77 240ms 13 Oct 2025 182nd jtaxen 0 77 19ms 16 Oct 2025 182nd albanian-laundromat 0 77 19ms 25 Nov 2025 182nd albanian-laundromat 0 77 412ms 6 Dec 2025 182nd anter69 🇭🇺 0 77 139ms 4 Feb 2026 182nd Matter1024 🇮🇳 0 77 17ms 12 Feb 2026 182nd KasperKivimaeki 🇫🇮 0 77 564ms 9 days ago 182nd StefanHabel 🇨🇦 0 77 1,207ms 20 hours ago 182nd ahmetdemirag 🇨🇾 0 77 18ms 14 hours ago 182nd tomh1012 0 77 17ms 13 hours ago 182nd HumanoidCPU 0 77 230ms 2 hours ago 205th jameswmccarty 0 78 20ms 29 Mar 2025 205th DialFrost 🇸🇬 0 78 940ms 10 May 2025 205th DialFrost 🇸🇬 0 78 3ms 10 May 2025 205th solisolu 0 78 20ms 10 Nov 2025 209th BREMAUCY 🇫🇷 0 79 18ms 16 hours ago 209th Andrey2001 0 79 18ms 10 hours ago 211th Shanethegamer 🇺🇸 0 80 5ms 3 Jun 2025 211th error256 0 80 466ms 16 Jan 2026 211th madex 🇩🇪 0 80 378ms 19 hours ago 214th Shanethegamer 🇺🇸 0 81 348ms 3 Jun 2025 215th bricknellj 0 82 17ms 30 Jan 2025 215th dokutan 0 82 17ms 15 Aug 2025 215th scpchicken 🇵🇼 0 82 402ms 26 hours ago 215th KatieLG 🇬🇧 0 82 18ms 26 hours ago 215th madex 🇩🇪 0 82 4ms 19 hours ago 220th GolfingSuccess 🇬🇷 0 83 114ms 12 Jan 2026 220th GolfingSuccess 🇬🇷 0 83 386ms 12 Jan 2026 220th error256 0 83 430ms 12 Jan 2026 220th albanian-laundromat 0 83 9ms 26 Jan 2026 224th Shanethegamer 🇺🇸 0 85 6ms 13 Dec 2024 224th edsrzf 🇳🇿 0 85 1,065ms 25 May 2025 224th albanian-laundromat 0 85 92ms 6 Dec 2025 224th GolfingSuccess 🇬🇷 0 85 25ms 14 Jan 2026 228th kg583 🇺🇸 0 86 23ms 2 Oct 2025 228th GolfingSuccess 🇬🇷 0 86 2,109ms 15 days ago 230th sean-niemann 🇺🇸 0 87 42ms 9 May 2025 230th CaedenHarper 🇨🇦 0 87 439ms 2 hours ago 232nd edsrzf 🇳🇿 0 88 2,094ms 15 May 2025 232nd muser-logiccpu 🇺🇦 0 88 72ms 2 Sep 2025 232nd solisolu 0 88 3ms 11 Nov 2025 232nd albanian-laundromat 0 88 1,372ms 5 Jan 2026 232nd error256 0 88 3,067ms 14 Jan 2026 232nd IanUtley 0 88 2,941ms 16 Jan 2026 232nd edsrzf 🇳🇿 0 88 26ms 6 hours ago 239th Shanethegamer 🇺🇸 0 89 99ms 13 Dec 2024 239th GolfingSuccess 🇬🇷 0 89 65ms 12 Jan 2026 First Prev 161–240 of 306 Next Last