The Gray Code Decoder and Gray Code Encoder holes will go live in approximately 4 days. Why not try and solve them ahead of time?
Gray Code Encoder in all languages in chars. 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 Chars Time Submitted 156th DialFrost 🇸🇬 0 51 302ms 8 Sep 2025 156th HumanoidCPU 0 51 394ms 2 days ago 156th albanian-laundromat 0 51 5ms 2 days ago 156th ovs-code 🇩🇪 0 51 19ms 13 hours ago 156th Steffan153 🇫🇮 0 51 17ms 12 hours ago 156th Steffan153 🇫🇮 0 51 124ms 8 hours ago 167th DialFrost 🇸🇬 0 52 461ms 17 Feb 2025 167th CaedenHarper 🇨🇦 0 52 530ms 5 days ago 169th dokutan 0 53 426ms 15 Aug 2025 169th MeWhenI 🇻🇦 0 53 393ms 21 Nov 2025 169th albanian-laundromat 0 53 467ms 15 Jan 2026 169th AlephSquirrel 0 53 383ms 4 days ago 173rd Shanethegamer 🇺🇸 0 54 69ms 12 Dec 2024 173rd error256 0 54 66ms 12 Apr 2025 173rd albanian-laundromat 0 54 779ms 15 Jan 2026 173rd GolfingSuccess 🇬🇷 0 54 71ms 4 days ago 173rd dokutan 0 54 778ms 2 days ago 173rd fuzzylojik-golf 🇺🇸 0 54 81ms 39 hours ago 173rd edsrzf 🇳🇿 0 54 70ms 20 hours ago 180th albanian-laundromat 0 55 39ms 5 days ago 181st hallvabo 🇳🇴 0 56 15ms 29 Nov 2024 181st kg583 🇺🇸 0 56 16ms 1 Dec 2024 181st CornerMercury 🇬🇧 0 56 15ms 3 Dec 2024 181st ndren 0 56 16ms 3 Dec 2024 181st lifthrasiir 🇰🇷 0 56 37ms 11 Dec 2024 181st GolfingSuccess 🇬🇷 0 56 16ms 30 Dec 2024 181st khvdm 0 56 16ms 12 Jan 2025 181st pardouin 🇫🇷 0 56 16ms 24 Feb 2025 181st Shanethegamer 🇺🇸 0 56 66ms 30 Apr 2025 181st GolfingSuccess 🇬🇷 0 56 70ms 8 May 2025 181st sean-niemann 🇺🇸 0 56 67ms 8 May 2025 181st sean-niemann 🇺🇸 0 56 16ms 8 May 2025 181st emgordon154 0 56 16ms 9 May 2025 181st dokutan 0 56 16ms 18 Aug 2025 181st albanian-laundromat 0 56 16ms 2 Dec 2025 181st DialFrost 🇸🇬 0 56 2,628ms 16 Dec 2025 181st Steffan153 🇫🇮 0 56 16ms 21 Feb 2026 181st fuzzylojik-golf 🇺🇸 0 56 17ms 3 days ago 181st Seek64 🇩🇪 0 56 16ms 2 days ago 181st BREMAUCY 🇫🇷 0 56 16ms 2 days ago 181st HumanoidCPU 0 56 15ms 2 days ago 181st plcc0 0 56 17ms 40 hours ago 203rd Shanethegamer 🇺🇸 0 57 326ms 25 May 2025 203rd sean-niemann 🇺🇸 0 57 176ms 25 May 2025 203rd edsrzf 🇳🇿 0 57 167ms 25 May 2025 203rd GolfingSuccess 🇬🇷 0 57 171ms 13 Dec 2025 203rd Matter1024 🇮🇳 0 57 68ms 13 Feb 2026 203rd albanian-laundromat 0 57 296ms 3 days ago 209th GolfingSuccess 🇬🇷 0 58 4,218ms 8 May 2025 209th dokutan 0 58 189ms 34 hours ago 211th GolfingSuccess 🇬🇷 0 59 17ms 8 May 2025 211th IanUtley 0 59 18ms 8 May 2025 211th GolfingSuccess 🇬🇷 0 59 63ms 8 May 2025 214th pardouin 🇫🇷 0 60 2,725ms 15 Feb 2026 214th fuzzylojik-golf 🇺🇸 0 60 16ms 3 days ago 214th emgordon154 0 60 3,008ms 2 days ago 214th edsrzf 🇳🇿 0 60 2,595ms 2 days ago 214th fuzzylojik-golf 🇺🇸 0 60 2,673ms 42 hours ago 219th GolfingSuccess 🇬🇷 0 61 2,438ms 8 May 2025 219th madex 🇩🇪 0 61 2,738ms 5 days ago 221st AlephSquirrel 0 62 15ms 25 Nov 2024 221st btnlq 0 62 15ms 4 Dec 2024 221st Shanethegamer 🇺🇸 0 62 16ms 10 Dec 2024 221st Artemis21 🇬🇧 0 62 16ms 24 Dec 2024 221st ovs-code 🇩🇪 0 62 15ms 5 Jan 2025 221st bricknellj 0 62 16ms 30 Jan 2025 221st DialFrost 🇸🇬 0 62 15ms 17 Feb 2025 221st error256 0 62 16ms 12 Apr 2025 221st MeWhenI 🇻🇦 0 62 14ms 8 May 2025 221st Shanethegamer 🇺🇸 0 62 2,495ms 8 May 2025 221st 4atj 0 62 16ms 9 May 2025 221st Natanaelel 🇸🇪 0 62 16ms 11 May 2025 221st hiichbindermax 0 62 18ms 17 Aug 2025 221st 5cw 🇺🇸 0 62 15ms 22 Aug 2025 221st commandz0 🇺🇸 0 62 15ms 27 Aug 2025 221st SirBogman 🇺🇸 0 62 15ms 12 Oct 2025 221st KasperKivimaeki 🇫🇮 0 62 15ms 20 Oct 2025 221st Matter1024 🇮🇳 0 62 15ms 12 Feb 2026 221st lukegustafson 🇺🇸 0 62 36ms 17 days ago 221st aksyristos 0 62 14ms 15 days ago First Prev 161–240 of 457 Next Last