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 149th bricknellj 0 62 16ms 30 Jan 2025 149th DialFrost 🇸🇬 0 62 15ms 17 Feb 2025 149th pardouin 🇫🇷 0 62 14ms 24 Feb 2025 149th error256 0 62 16ms 12 Apr 2025 149th MeWhenI 🇻🇦 0 62 14ms 8 May 2025 149th Shanethegamer 🇺🇸 0 62 2,495ms 8 May 2025 149th sean-niemann 🇺🇸 0 62 16ms 8 May 2025 149th 4atj 0 62 16ms 9 May 2025 149th emgordon154 0 62 16ms 9 May 2025 149th Natanaelel 🇸🇪 0 62 16ms 11 May 2025 149th dokutan 0 62 14ms 15 Aug 2025 149th hiichbindermax 0 62 18ms 17 Aug 2025 149th 5cw 🇺🇸 0 62 15ms 22 Aug 2025 149th commandz0 🇺🇸 0 62 15ms 27 Aug 2025 149th SirBogman 🇺🇸 0 62 15ms 12 Oct 2025 149th KasperKivimaeki 🇫🇮 0 62 15ms 20 Oct 2025 149th albanian-laundromat 0 62 16ms 2 Dec 2025 149th GolfingSuccess 🇬🇷 0 62 5ms 13 Dec 2025 149th Matter1024 🇮🇳 0 62 15ms 12 Feb 2026 149th Steffan153 🇫🇮 0 62 16ms 19 Feb 2026 149th lukegustafson 🇺🇸 0 62 36ms 14 days ago 149th aksyristos 0 62 14ms 12 days ago 149th madex 🇩🇪 0 62 15ms 4 days ago 149th CaedenHarper 🇨🇦 0 62 16ms 2 days ago 149th KatieLG 🇬🇧 0 62 17ms 5 hours ago 149th KatieLG 🇬🇧 0 62 416ms 5 hours ago 149th scpchicken 🇵🇼 0 62 15ms 5 hours ago 149th fuzzylojik-golf 🇺🇸 0 62 15ms 5 hours ago 189th sean-niemann 🇺🇸 0 63 43ms 8 May 2025 189th albanian-laundromat 0 63 44ms 14 Jan 2026 191st jameswmccarty 0 64 15ms 29 Mar 2025 191st albanian-laundromat 0 64 188ms 2 days ago 193rd Shanethegamer 🇺🇸 0 66 1,317ms 26 Nov 2024 193rd rucin93 🇵🇱 0 66 6ms 8 May 2025 193rd sean-niemann 🇺🇸 0 66 7ms 8 May 2025 193rd AdrienHache 🇫🇷 0 66 421ms 2 Nov 2025 193rd namelessiw 0 66 434ms 2 Nov 2025 193rd GolfingSuccess 🇬🇷 0 66 430ms 4 Feb 2026 193rd albanian-laundromat 0 66 1,391ms 2 days ago 193rd Yax42 🇫🇷 0 66 484ms 14 hours ago 193rd fuzzylojik-golf 🇺🇸 0 66 456ms 3 hours ago 202nd GolfingSuccess 🇬🇷 0 67 12ms 8 May 2025 203rd Shanethegamer 🇺🇸 0 68 145ms 26 Nov 2024 203rd sean-niemann 🇺🇸 0 68 131ms 8 May 2025 203rd edsrzf 🇳🇿 0 68 113ms 25 May 2025 203rd GolfingSuccess 🇬🇷 0 68 110ms 28 hours ago 207th GolfingSuccess 🇬🇷 0 69 10ms 8 May 2025 207th CaedenHarper 🇨🇦 0 69 486ms 31 hours ago 209th JOrE20 0 70 41ms 13 Feb 2026 210th kg583 🇺🇸 0 71 27ms 1 Dec 2024 210th CLOStrophobic 🇮🇹 0 71 13ms 18 Jan 2025 210th GolfingSuccess 🇬🇷 0 71 14ms 7 May 2025 210th edsrzf 🇳🇿 0 71 14ms 8 May 2025 210th AlephSquirrel 0 71 13ms 9 May 2025 215th Shanethegamer 🇺🇸 0 72 27ms 9 Dec 2024 215th dokutan 0 72 62ms 8 Feb 2026 217th GolfingSuccess 🇬🇷 0 73 16ms 8 May 2025 218th Shanethegamer 🇺🇸 0 75 99ms 26 Nov 2024 218th sean-niemann 🇺🇸 0 75 103ms 8 May 2025 220th GolfingSuccess 🇬🇷 0 76 133ms 28 Nov 2025 220th fuzzylojik-golf 🇺🇸 0 76 104ms 3 hours ago 222nd rucin93 🇵🇱 0 77 130ms 8 May 2025 222nd ovs-code 🇩🇪 0 77 81ms 30 May 2025 222nd Shanethegamer 🇺🇸 0 77 146ms 12 Nov 2025 225th saito-ta 🇯🇵 0 78 4ms 10 May 2025 225th rhdqor213 0 78 4ms 10 May 2025 225th albanian-laundromat 0 78 100ms 2 days ago 228th GolfingSuccess 🇬🇷 0 79 79ms 14 May 2025 229th sean-niemann 🇺🇸 0 80 455ms 8 May 2025 230th kumavale 0 81 156ms 26 Nov 2025 230th Matter1024 🇮🇳 0 81 45ms 14 Feb 2026 230th albanian-laundromat 0 81 46ms 2 days ago 233rd GolfingSuccess 🇬🇷 0 82 502ms 8 May 2025 233rd emgordon154 0 82 162ms 14 Feb 2026 235th Shanethegamer 🇺🇸 0 83 484ms 26 Nov 2024 235th edsrzf 🇳🇿 0 83 414ms 9 Jul 2025 235th Shanethegamer 🇺🇸 0 83 403ms 9 Jul 2025 235th fantaize 0 83 156ms 13 days ago 239th Shanethegamer 🇺🇸 0 84 416ms 26 Nov 2024 239th ovs-code 🇩🇪 0 84 12ms 10 May 2025 First Prev 161–240 of 312 Next Last