The Gray Code Decoder and Gray Code Encoder holes will go live in approximately 3 days. Why not try and solve them ahead of time?
Gray Code Encoder 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 157th Shanethegamer 🇺🇸 0 51 150ms 8 May 2025 157th sean-niemann 🇺🇸 0 51 150ms 9 May 2025 157th DialFrost 🇸🇬 0 51 302ms 8 Sep 2025 157th albanian-laundromat 0 51 5ms 3 days ago 157th ovs-code 🇩🇪 0 51 19ms 47 hours ago 157th Steffan153 🇫🇮 0 51 17ms 47 hours ago 157th Steffan153 🇫🇮 0 51 124ms 43 hours ago 168th DialFrost 🇸🇬 0 52 461ms 17 Feb 2025 168th CaedenHarper 🇨🇦 0 52 530ms 6 days ago 168th HumanoidCPU 0 52 394ms 3 days ago 168th plcc0 0 52 459ms 2 days ago 172nd antimon2 🇯🇵 0 53 288ms 16 Dec 2024 172nd Shanethegamer 🇺🇸 0 53 315ms 1 Feb 2025 172nd dokutan 0 53 426ms 15 Aug 2025 172nd MeWhenI 🇻🇦 0 53 360ms 21 Nov 2025 172nd albanian-laundromat 0 53 467ms 15 Jan 2026 172nd AlephSquirrel 0 53 383ms 5 days ago 172nd DialFrost 🇸🇬 0 53 330ms 2 days ago 172nd ovs-code 🇩🇪 0 53 272ms 47 hours ago 172nd Steffan153 🇫🇮 0 53 290ms 40 hours ago 181st Shanethegamer 🇺🇸 0 54 69ms 12 Dec 2024 181st error256 0 54 66ms 12 Apr 2025 181st albanian-laundromat 0 54 779ms 15 Jan 2026 181st GolfingSuccess 🇬🇷 0 54 71ms 5 days ago 181st dokutan 0 54 778ms 3 days ago 181st fuzzylojik-golf 🇺🇸 0 54 81ms 3 days ago 181st edsrzf 🇳🇿 0 54 70ms 2 days ago 181st madex 🇩🇪 0 54 10ms 32 hours ago 189th albanian-laundromat 0 55 39ms 6 days ago 190th Shanethegamer 🇺🇸 0 56 66ms 30 Apr 2025 190th GolfingSuccess 🇬🇷 0 56 70ms 8 May 2025 190th sean-niemann 🇺🇸 0 56 67ms 8 May 2025 190th DialFrost 🇸🇬 0 56 2,628ms 16 Dec 2025 194th Shanethegamer 🇺🇸 0 57 326ms 25 May 2025 194th sean-niemann 🇺🇸 0 57 176ms 25 May 2025 194th edsrzf 🇳🇿 0 57 167ms 25 May 2025 194th GolfingSuccess 🇬🇷 0 57 171ms 13 Dec 2025 194th Matter1024 🇮🇳 0 57 68ms 13 Feb 2026 194th albanian-laundromat 0 57 296ms 5 days ago 194th MeWhenI 🇻🇦 0 57 161ms 30 hours ago 201st GolfingSuccess 🇬🇷 0 58 4,218ms 8 May 2025 202nd GolfingSuccess 🇬🇷 0 59 17ms 8 May 2025 202nd IanUtley 0 59 18ms 8 May 2025 202nd GolfingSuccess 🇬🇷 0 59 63ms 8 May 2025 202nd acollett89 0 59 13ms 23 hours ago 206th pardouin 🇫🇷 0 60 2,725ms 15 Feb 2026 206th fuzzylojik-golf 🇺🇸 0 60 16ms 4 days ago 206th emgordon154 0 60 3,008ms 3 days ago 206th edsrzf 🇳🇿 0 60 2,595ms 3 days ago 206th fuzzylojik-golf 🇺🇸 0 60 2,673ms 3 days ago 211th GolfingSuccess 🇬🇷 0 61 2,438ms 8 May 2025 211th madex 🇩🇪 0 61 2,500ms 7 days ago 211th dokutan 0 61 189ms 3 days ago 214th lifthrasiir 🇰🇷 0 62 37ms 22 Nov 2024 214th GolfingSuccess 🇬🇷 0 62 15ms 25 Nov 2024 214th AlephSquirrel 0 62 15ms 25 Nov 2024 214th hallvabo 🇳🇴 0 62 38ms 26 Nov 2024 214th kg583 🇺🇸 0 62 36ms 1 Dec 2024 214th CornerMercury 🇬🇧 0 62 15ms 3 Dec 2024 214th ndren 0 62 15ms 3 Dec 2024 214th btnlq 0 62 15ms 4 Dec 2024 214th Shanethegamer 🇺🇸 0 62 16ms 10 Dec 2024 214th Artemis21 🇬🇧 0 62 16ms 24 Dec 2024 214th ovs-code 🇩🇪 0 62 15ms 5 Jan 2025 214th khvdm 0 62 15ms 12 Jan 2025 214th bricknellj 0 62 16ms 30 Jan 2025 214th DialFrost 🇸🇬 0 62 15ms 17 Feb 2025 214th pardouin 🇫🇷 0 62 14ms 24 Feb 2025 214th error256 0 62 16ms 12 Apr 2025 214th MeWhenI 🇻🇦 0 62 14ms 8 May 2025 214th Shanethegamer 🇺🇸 0 62 2,495ms 8 May 2025 214th sean-niemann 🇺🇸 0 62 16ms 8 May 2025 214th 4atj 0 62 16ms 9 May 2025 214th emgordon154 0 62 16ms 9 May 2025 214th Natanaelel 🇸🇪 0 62 16ms 11 May 2025 214th dokutan 0 62 14ms 15 Aug 2025 214th hiichbindermax 0 62 18ms 17 Aug 2025 214th 5cw 🇺🇸 0 62 15ms 22 Aug 2025 214th commandz0 🇺🇸 0 62 15ms 27 Aug 2025 214th SirBogman 🇺🇸 0 62 15ms 12 Oct 2025 First Prev 161–240 of 485 Next Last