The Gray Code Decoder and Gray Code Encoder holes will go live in approximately 5 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 edsrzf 🇳🇿 0 69 394ms 32 hours ago 162nd btnlq 0 70 193ms 4 Dec 2024 162nd error256 0 70 129ms 15 Jan 2026 162nd error256 0 70 18ms 13 days ago 162nd Seek64 🇩🇪 0 70 116ms 47 hours ago 166th GolfingSuccess 🇬🇷 0 71 3ms 12 Jan 2026 166th GolfingSuccess 🇬🇷 0 71 24ms 12 Jan 2026 166th GolfingSuccess 🇬🇷 0 71 18ms 14 Jan 2026 166th ovs-code 🇩🇪 0 71 134ms 45 hours ago 166th edsrzf 🇳🇿 0 71 18ms 37 hours ago 166th kg583 🇺🇸 0 71 18ms 36 hours ago 166th rhdqor213 0 71 4ms 31 hours ago 173rd dokutan 0 72 525ms 15 Aug 2025 173rd rucin93 🇵🇱 0 72 9ms 19 days ago 173rd aksyristos 0 72 247ms 14 days ago 173rd blaztoma 🇱🇹 0 72 123ms 2 days ago 173rd Emutis 🇱🇹 0 72 121ms 2 days ago 173rd KasperKivimaeki 🇫🇮 0 72 4ms 43 hours ago 173rd edsrzf 🇳🇿 0 72 9ms 30 hours ago 173rd zacjl 0 72 131ms 11 hours ago 173rd Steffan153 🇫🇮 0 72 4ms 43 mins ago 182nd IISResetMe 0 73 310ms 10 Jan 2026 182nd pardouin 🇫🇷 0 73 179ms 14 Feb 2026 182nd Steffan153 🇫🇮 0 73 166ms 19 Feb 2026 185th saito-ta 🇯🇵 0 74 3ms 11 May 2025 185th kg583 🇺🇸 0 74 135ms 3 Oct 2025 185th error256 0 74 3ms 12 Jan 2026 185th lukegustafson 🇺🇸 0 74 189ms 17 days ago 185th albanian-laundromat 0 74 9ms 9 days ago 190th kg583 🇺🇸 0 75 38ms 1 Dec 2024 190th hallvabo 🇳🇴 0 75 131ms 30 Dec 2024 190th Shanethegamer 🇺🇸 0 75 71ms 7 May 2025 190th Natanaelel 🇸🇪 0 75 19ms 11 May 2025 190th commandz0 🇺🇸 0 75 1,210ms 27 Aug 2025 190th albanian-laundromat 0 75 108ms 5 Jan 2026 190th albanian-laundromat 0 75 455ms 6 Jan 2026 190th GolfingSuccess 🇬🇷 0 75 18ms 11 Jan 2026 190th albanian-laundromat 0 75 238ms 23 days ago 190th madex 🇩🇪 0 75 18ms 7 days ago 190th CaedenHarper 🇨🇦 0 75 149ms 4 days ago 190th fuzzylojik-golf 🇺🇸 0 75 123ms 2 days ago 190th Yax42 🇫🇷 0 75 4ms 45 hours ago 190th edsrzf 🇳🇿 0 75 17ms 30 hours ago 190th plcc0 0 75 22ms 24 hours ago 190th zgialor-lab 0 75 25ms 22 hours ago 206th Shanethegamer 🇺🇸 0 76 129ms 13 Dec 2024 206th ovs-code 🇩🇪 0 76 3ms 10 May 2025 206th AlephSquirrel 0 76 43ms 3 Dec 2025 206th AlephSquirrel 0 76 445ms 3 Dec 2025 206th albanian-laundromat 0 76 18ms 23 days ago 206th albanian-laundromat 0 76 188ms 17 days ago 206th MeWhenI 🇻🇦 0 76 586ms 10 days ago 206th MeWhenI 🇻🇦 0 76 184ms 16 hours ago 206th duckyluuk 🇳🇱 0 76 123ms 12 mins ago 215th CornerMercury 🇬🇧 0 77 18ms 3 Dec 2024 215th ndren 0 77 20ms 3 Dec 2024 215th lifthrasiir 🇰🇷 0 77 192ms 11 Dec 2024 215th Shanethegamer 🇺🇸 0 77 19ms 13 Dec 2024 215th DialFrost 🇸🇬 0 77 19ms 8 May 2025 215th emgordon154 0 77 161ms 9 May 2025 215th Natanaelel 🇸🇪 0 77 3ms 11 May 2025 215th addmai 0 77 20ms 24 Jul 2025 215th hiichbindermax 0 77 19ms 17 Aug 2025 215th 5cw 🇺🇸 0 77 18ms 22 Aug 2025 215th davecame 0 77 135ms 25 Sep 2025 215th SirBogman 🇺🇸 0 77 240ms 13 Oct 2025 215th jtaxen 0 77 19ms 16 Oct 2025 215th albanian-laundromat 0 77 19ms 25 Nov 2025 215th albanian-laundromat 0 77 412ms 6 Dec 2025 215th anter69 🇭🇺 0 77 139ms 4 Feb 2026 215th Matter1024 🇮🇳 0 77 17ms 12 Feb 2026 215th KasperKivimaeki 🇫🇮 0 77 564ms 10 days ago 215th StefanHabel 🇨🇦 0 77 1,217ms 2 days ago 215th ahmetdemirag 🇨🇾 0 77 18ms 2 days ago 215th tomh1012 0 77 17ms 2 days ago 215th HumanoidCPU 0 77 230ms 40 hours ago 215th qpwoeirut 0 77 20ms 35 hours ago 215th btjones0 0 77 19ms 33 hours ago 215th ComradeSquirrel 0 77 18ms 31 hours ago 215th bzijlema 🇳🇱 0 77 18ms 30 hours ago First Prev 161–240 of 362 Next Last