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 150th khvdm 0 62 15ms 12 Jan 2025 150th bricknellj 0 62 16ms 30 Jan 2025 150th DialFrost 🇸🇬 0 62 15ms 17 Feb 2025 150th pardouin 🇫🇷 0 62 14ms 24 Feb 2025 150th error256 0 62 16ms 12 Apr 2025 150th MeWhenI 🇻🇦 0 62 14ms 8 May 2025 150th Shanethegamer 🇺🇸 0 62 2,495ms 8 May 2025 150th sean-niemann 🇺🇸 0 62 16ms 8 May 2025 150th 4atj 0 62 16ms 9 May 2025 150th emgordon154 0 62 16ms 9 May 2025 150th Natanaelel 🇸🇪 0 62 16ms 11 May 2025 150th dokutan 0 62 14ms 15 Aug 2025 150th hiichbindermax 0 62 18ms 17 Aug 2025 150th 5cw 🇺🇸 0 62 15ms 22 Aug 2025 150th commandz0 🇺🇸 0 62 15ms 27 Aug 2025 150th SirBogman 🇺🇸 0 62 15ms 12 Oct 2025 150th KasperKivimaeki 🇫🇮 0 62 15ms 20 Oct 2025 150th albanian-laundromat 0 62 16ms 2 Dec 2025 150th GolfingSuccess 🇬🇷 0 62 5ms 13 Dec 2025 150th Matter1024 🇮🇳 0 62 15ms 12 Feb 2026 150th Steffan153 🇫🇮 0 62 16ms 19 Feb 2026 150th lukegustafson 🇺🇸 0 62 36ms 15 days ago 150th aksyristos 0 62 14ms 12 days ago 150th madex 🇩🇪 0 62 15ms 4 days ago 150th CaedenHarper 🇨🇦 0 62 16ms 2 days ago 150th KatieLG 🇬🇧 0 62 17ms 9 hours ago 150th KatieLG 🇬🇧 0 62 416ms 9 hours ago 150th scpchicken 🇵🇼 0 62 15ms 9 hours ago 150th fuzzylojik-golf 🇺🇸 0 62 15ms 9 hours ago 150th StefanHabel 🇨🇦 0 62 15ms 3 hours ago 150th Seek64 🇩🇪 0 62 15ms 96 mins ago 150th blaztoma 🇱🇹 0 62 15ms 81 mins ago 193rd sean-niemann 🇺🇸 0 63 43ms 8 May 2025 193rd albanian-laundromat 0 63 44ms 14 Jan 2026 195th jameswmccarty 0 64 15ms 29 Mar 2025 195th albanian-laundromat 0 64 188ms 2 days ago 197th Shanethegamer 🇺🇸 0 66 1,317ms 26 Nov 2024 197th rucin93 🇵🇱 0 66 6ms 8 May 2025 197th sean-niemann 🇺🇸 0 66 7ms 8 May 2025 197th AdrienHache 🇫🇷 0 66 421ms 2 Nov 2025 197th namelessiw 0 66 434ms 2 Nov 2025 197th GolfingSuccess 🇬🇷 0 66 430ms 4 Feb 2026 197th albanian-laundromat 0 66 1,391ms 2 days ago 197th Yax42 🇫🇷 0 66 484ms 18 hours ago 197th fuzzylojik-golf 🇺🇸 0 66 456ms 7 hours ago 206th GolfingSuccess 🇬🇷 0 67 12ms 8 May 2025 207th Shanethegamer 🇺🇸 0 68 145ms 26 Nov 2024 207th sean-niemann 🇺🇸 0 68 131ms 8 May 2025 207th edsrzf 🇳🇿 0 68 113ms 25 May 2025 207th GolfingSuccess 🇬🇷 0 68 110ms 32 hours ago 211th GolfingSuccess 🇬🇷 0 69 10ms 8 May 2025 211th CaedenHarper 🇨🇦 0 69 486ms 35 hours ago 213th JOrE20 0 70 41ms 13 Feb 2026 214th kg583 🇺🇸 0 71 27ms 1 Dec 2024 214th CLOStrophobic 🇮🇹 0 71 13ms 18 Jan 2025 214th GolfingSuccess 🇬🇷 0 71 14ms 7 May 2025 214th edsrzf 🇳🇿 0 71 14ms 8 May 2025 214th AlephSquirrel 0 71 13ms 9 May 2025 219th Shanethegamer 🇺🇸 0 72 27ms 9 Dec 2024 219th dokutan 0 72 62ms 8 Feb 2026 221st GolfingSuccess 🇬🇷 0 73 16ms 8 May 2025 222nd Shanethegamer 🇺🇸 0 75 99ms 26 Nov 2024 222nd sean-niemann 🇺🇸 0 75 103ms 8 May 2025 224th GolfingSuccess 🇬🇷 0 76 133ms 28 Nov 2025 224th fuzzylojik-golf 🇺🇸 0 76 104ms 7 hours ago 226th rucin93 🇵🇱 0 77 130ms 8 May 2025 226th ovs-code 🇩🇪 0 77 81ms 30 May 2025 226th Shanethegamer 🇺🇸 0 77 146ms 12 Nov 2025 229th saito-ta 🇯🇵 0 78 4ms 10 May 2025 229th rhdqor213 0 78 4ms 10 May 2025 229th albanian-laundromat 0 78 100ms 2 days ago 232nd GolfingSuccess 🇬🇷 0 79 79ms 14 May 2025 233rd sean-niemann 🇺🇸 0 80 455ms 8 May 2025 234th kumavale 0 81 156ms 26 Nov 2025 234th Matter1024 🇮🇳 0 81 45ms 14 Feb 2026 234th albanian-laundromat 0 81 46ms 2 days ago 237th GolfingSuccess 🇬🇷 0 82 502ms 8 May 2025 237th emgordon154 0 82 162ms 14 Feb 2026 239th Shanethegamer 🇺🇸 0 83 484ms 26 Nov 2024 239th edsrzf 🇳🇿 0 83 414ms 9 Jul 2025 First Prev 161–240 of 316 Next Last