The Gray Code Decoder and Gray Code Encoder holes will go live in approximately 7 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 160th GolfingSuccess 🇬🇷 0 62 15ms 25 Nov 2024 160th AlephSquirrel 0 62 15ms 25 Nov 2024 160th hallvabo 🇳🇴 0 62 38ms 26 Nov 2024 160th kg583 🇺🇸 0 62 36ms 1 Dec 2024 160th CornerMercury 🇬🇧 0 62 15ms 3 Dec 2024 160th ndren 0 62 15ms 3 Dec 2024 160th btnlq 0 62 15ms 4 Dec 2024 160th Shanethegamer 🇺🇸 0 62 16ms 10 Dec 2024 160th Artemis21 🇬🇧 0 62 16ms 24 Dec 2024 160th ovs-code 🇩🇪 0 62 15ms 5 Jan 2025 160th khvdm 0 62 15ms 12 Jan 2025 160th bricknellj 0 62 16ms 30 Jan 2025 160th DialFrost 🇸🇬 0 62 15ms 17 Feb 2025 160th pardouin 🇫🇷 0 62 14ms 24 Feb 2025 160th error256 0 62 16ms 12 Apr 2025 160th MeWhenI 🇻🇦 0 62 14ms 8 May 2025 160th Shanethegamer 🇺🇸 0 62 2,495ms 8 May 2025 160th sean-niemann 🇺🇸 0 62 16ms 8 May 2025 160th 4atj 0 62 16ms 9 May 2025 160th emgordon154 0 62 16ms 9 May 2025 160th Natanaelel 🇸🇪 0 62 16ms 11 May 2025 160th dokutan 0 62 14ms 15 Aug 2025 160th hiichbindermax 0 62 18ms 17 Aug 2025 160th 5cw 🇺🇸 0 62 15ms 22 Aug 2025 160th commandz0 🇺🇸 0 62 15ms 27 Aug 2025 160th SirBogman 🇺🇸 0 62 15ms 12 Oct 2025 160th KasperKivimaeki 🇫🇮 0 62 15ms 20 Oct 2025 160th albanian-laundromat 0 62 16ms 2 Dec 2025 160th GolfingSuccess 🇬🇷 0 62 5ms 13 Dec 2025 160th Matter1024 🇮🇳 0 62 15ms 12 Feb 2026 160th Steffan153 🇫🇮 0 62 16ms 19 Feb 2026 160th lukegustafson 🇺🇸 0 62 36ms 15 days ago 160th aksyristos 0 62 14ms 12 days ago 160th madex 🇩🇪 0 62 15ms 5 days ago 160th CaedenHarper 🇨🇦 0 62 16ms 3 days ago 160th KatieLG 🇬🇧 0 62 17ms 22 hours ago 160th KatieLG 🇬🇧 0 62 416ms 22 hours ago 160th scpchicken 🇵🇼 0 62 15ms 22 hours ago 160th fuzzylojik-golf 🇺🇸 0 62 15ms 21 hours ago 160th StefanHabel 🇨🇦 0 62 15ms 15 hours ago 160th Seek64 🇩🇪 0 62 15ms 14 hours ago 160th blaztoma 🇱🇹 0 62 15ms 13 hours ago 160th BREMAUCY 🇫🇷 0 62 16ms 11 hours ago 160th Emutis 🇱🇹 0 62 16ms 11 hours ago 160th Andrey2001 0 62 17ms 5 hours ago 160th anter69 🇭🇺 0 62 15ms 79 mins ago 207th sean-niemann 🇺🇸 0 63 43ms 8 May 2025 207th albanian-laundromat 0 63 44ms 14 Jan 2026 207th tomh1012 0 63 15ms 9 hours ago 210th jameswmccarty 0 64 15ms 29 Mar 2025 210th albanian-laundromat 0 64 188ms 2 days ago 212th Shanethegamer 🇺🇸 0 66 1,317ms 26 Nov 2024 212th rucin93 🇵🇱 0 66 6ms 8 May 2025 212th sean-niemann 🇺🇸 0 66 7ms 8 May 2025 212th AdrienHache 🇫🇷 0 66 421ms 2 Nov 2025 212th namelessiw 0 66 434ms 2 Nov 2025 212th GolfingSuccess 🇬🇷 0 66 430ms 4 Feb 2026 212th albanian-laundromat 0 66 1,391ms 2 days ago 212th Yax42 🇫🇷 0 66 484ms 31 hours ago 212th fuzzylojik-golf 🇺🇸 0 66 456ms 20 hours ago 221st GolfingSuccess 🇬🇷 0 67 12ms 8 May 2025 221st tomh1012 0 67 429ms 9 hours ago 223rd Shanethegamer 🇺🇸 0 68 145ms 26 Nov 2024 223rd sean-niemann 🇺🇸 0 68 131ms 8 May 2025 223rd edsrzf 🇳🇿 0 68 113ms 25 May 2025 223rd GolfingSuccess 🇬🇷 0 68 110ms 45 hours ago 227th GolfingSuccess 🇬🇷 0 69 10ms 8 May 2025 227th CaedenHarper 🇨🇦 0 69 486ms 47 hours ago 229th JOrE20 0 70 41ms 13 Feb 2026 230th kg583 🇺🇸 0 71 27ms 1 Dec 2024 230th CLOStrophobic 🇮🇹 0 71 13ms 18 Jan 2025 230th GolfingSuccess 🇬🇷 0 71 14ms 7 May 2025 230th edsrzf 🇳🇿 0 71 14ms 8 May 2025 230th AlephSquirrel 0 71 13ms 9 May 2025 235th Shanethegamer 🇺🇸 0 72 27ms 9 Dec 2024 235th dokutan 0 72 62ms 8 Feb 2026 235th edsrzf 🇳🇿 0 72 7ms 2 hours ago 238th GolfingSuccess 🇬🇷 0 73 16ms 8 May 2025 239th Shanethegamer 🇺🇸 0 75 99ms 26 Nov 2024 239th sean-niemann 🇺🇸 0 75 103ms 8 May 2025 First Prev 161–240 of 340 Next Last