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 156th KasperKivimaeki 🇫🇮 0 72 4ms 12 hours ago 162nd IISResetMe 0 73 310ms 10 Jan 2026 162nd pardouin 🇫🇷 0 73 179ms 14 Feb 2026 162nd Steffan153 🇫🇮 0 73 1,278ms 19 Feb 2026 165th saito-ta 🇯🇵 0 74 3ms 11 May 2025 165th kg583 🇺🇸 0 74 135ms 3 Oct 2025 165th error256 0 74 3ms 12 Jan 2026 165th lukegustafson 🇺🇸 0 74 189ms 16 days ago 165th albanian-laundromat 0 74 9ms 8 days ago 170th kg583 🇺🇸 0 75 38ms 1 Dec 2024 170th hallvabo 🇳🇴 0 75 131ms 30 Dec 2024 170th Shanethegamer 🇺🇸 0 75 71ms 7 May 2025 170th Natanaelel 🇸🇪 0 75 19ms 11 May 2025 170th commandz0 🇺🇸 0 75 1,210ms 27 Aug 2025 170th albanian-laundromat 0 75 108ms 5 Jan 2026 170th albanian-laundromat 0 75 455ms 6 Jan 2026 170th GolfingSuccess 🇬🇷 0 75 18ms 11 Jan 2026 170th albanian-laundromat 0 75 238ms 22 days ago 170th madex 🇩🇪 0 75 18ms 6 days ago 170th CaedenHarper 🇨🇦 0 75 149ms 3 days ago 170th fuzzylojik-golf 🇺🇸 0 75 123ms 32 hours ago 170th Yax42 🇫🇷 0 75 4ms 14 hours ago 183rd Shanethegamer 🇺🇸 0 76 129ms 13 Dec 2024 183rd edsrzf 🇳🇿 0 76 114ms 10 May 2025 183rd ovs-code 🇩🇪 0 76 3ms 10 May 2025 183rd AlephSquirrel 0 76 43ms 3 Dec 2025 183rd AlephSquirrel 0 76 445ms 3 Dec 2025 183rd albanian-laundromat 0 76 18ms 22 days ago 183rd albanian-laundromat 0 76 188ms 16 days ago 183rd MeWhenI 🇻🇦 0 76 586ms 9 days ago 191st CornerMercury 🇬🇧 0 77 18ms 3 Dec 2024 191st ndren 0 77 20ms 3 Dec 2024 191st lifthrasiir 🇰🇷 0 77 192ms 11 Dec 2024 191st Shanethegamer 🇺🇸 0 77 19ms 13 Dec 2024 191st DialFrost 🇸🇬 0 77 19ms 8 May 2025 191st emgordon154 0 77 161ms 9 May 2025 191st edsrzf 🇳🇿 0 77 1,938ms 9 May 2025 191st Natanaelel 🇸🇪 0 77 3ms 11 May 2025 191st addmai 0 77 20ms 24 Jul 2025 191st hiichbindermax 0 77 19ms 17 Aug 2025 191st 5cw 🇺🇸 0 77 18ms 22 Aug 2025 191st davecame 0 77 150ms 25 Sep 2025 191st SirBogman 🇺🇸 0 77 240ms 13 Oct 2025 191st jtaxen 0 77 19ms 16 Oct 2025 191st albanian-laundromat 0 77 19ms 25 Nov 2025 191st albanian-laundromat 0 77 412ms 6 Dec 2025 191st anter69 🇭🇺 0 77 139ms 4 Feb 2026 191st Matter1024 🇮🇳 0 77 17ms 12 Feb 2026 191st KasperKivimaeki 🇫🇮 0 77 564ms 9 days ago 191st StefanHabel 🇨🇦 0 77 1,207ms 26 hours ago 191st ahmetdemirag 🇨🇾 0 77 18ms 21 hours ago 191st tomh1012 0 77 17ms 19 hours ago 191st HumanoidCPU 0 77 230ms 9 hours ago 191st qpwoeirut 0 77 20ms 4 hours ago 191st btjones0 0 77 19ms 2 hours ago 191st ComradeSquirrel 0 77 18ms 34 mins ago 217th jameswmccarty 0 78 20ms 29 Mar 2025 217th DialFrost 🇸🇬 0 78 940ms 10 May 2025 217th DialFrost 🇸🇬 0 78 3ms 10 May 2025 217th solisolu 0 78 20ms 10 Nov 2025 221st BREMAUCY 🇫🇷 0 79 18ms 23 hours ago 221st Andrey2001 0 79 18ms 16 hours ago 223rd Shanethegamer 🇺🇸 0 80 5ms 3 Jun 2025 223rd error256 0 80 466ms 16 Jan 2026 223rd madex 🇩🇪 0 80 378ms 25 hours ago 223rd stefangimmillaro 0 80 19ms 3 hours ago 223rd albanian-laundromat 0 80 28ms 3 hours ago 228th Shanethegamer 🇺🇸 0 81 348ms 3 Jun 2025 229th bricknellj 0 82 17ms 30 Jan 2025 229th dokutan 0 82 17ms 15 Aug 2025 229th scpchicken 🇵🇼 0 82 402ms 33 hours ago 229th KatieLG 🇬🇧 0 82 18ms 33 hours ago 229th madex 🇩🇪 0 82 4ms 25 hours ago 234th GolfingSuccess 🇬🇷 0 83 114ms 12 Jan 2026 234th GolfingSuccess 🇬🇷 0 83 386ms 12 Jan 2026 234th error256 0 83 430ms 12 Jan 2026 234th albanian-laundromat 0 83 9ms 26 Jan 2026 234th edsrzf 🇳🇿 0 83 473ms 2 hours ago 234th edsrzf 🇳🇿 0 83 1,251ms 45 mins ago 240th Shanethegamer 🇺🇸 0 85 6ms 13 Dec 2024 First Prev 161–240 of 321 Next Last