The Gray Code Decoder and Gray Code Encoder holes will go live in approximately 5 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 319th GolfingSuccess 🇬🇷 0 86 44ms 7 May 2025 319th GolfingSuccess 🇬🇷 0 86 2,577ms 8 May 2025 319th sean-niemann 🇺🇸 0 86 496ms 25 Sep 2025 319th MeWhenI 🇻🇦 0 86 381ms 21 Nov 2025 319th GolfingSuccess 🇬🇷 0 86 399ms 12 Jan 2026 319th elgan65536 🇺🇸 0 86 168ms 24 days ago 319th CaedenHarper 🇨🇦 0 86 399ms 4 days ago 319th CaedenHarper 🇨🇦 0 86 153ms 3 days ago 319th edsrzf 🇳🇿 0 86 414ms 25 hours ago 319th emgordon154 0 86 406ms 12 hours ago 319th GolfingSuccess 🇬🇷 0 86 19ms 4 hours ago 332nd Shanethegamer 🇺🇸 0 87 42ms 15 Apr 2025 332nd Shanethegamer 🇺🇸 0 87 20ms 8 May 2025 332nd albanian-laundromat 0 87 1,424ms 4 days ago 332nd Yax42 🇫🇷 0 87 2,430ms 34 hours ago 336th kg583 🇺🇸 0 88 23ms 12 Feb 2026 336th fuzzylojik-golf 🇺🇸 0 88 152ms 2 days ago 338th Shanethegamer 🇺🇸 0 89 341ms 6 May 2025 338th Shanethegamer 🇺🇸 0 89 511ms 24 Sep 2025 338th DialFrost 🇸🇬 0 89 367ms 21 Nov 2025 338th CaedenHarper 🇨🇦 0 89 103ms 3 days ago 342nd Yax42 🇫🇷 0 90 13ms 34 hours ago 343rd GolfingSuccess 🇬🇷 0 91 14ms 13 Dec 2025 344th namelessiw 0 92 504ms 10 Oct 2025 344th fuzzylojik-golf 🇺🇸 0 92 383ms 2 days ago 344th madex 🇩🇪 0 92 12ms 29 hours ago 347th edsrzf 🇳🇿 0 93 187ms 17 May 2025 347th CaedenHarper 🇨🇦 0 93 13ms 4 days ago 349th DialFrost 🇸🇬 0 94 13ms 10 May 2025 349th edsrzf 🇳🇿 0 94 21ms 9 hours ago 351st Yax42 🇫🇷 0 95 389ms 34 hours ago 352nd GolfingSuccess 🇬🇷 0 96 182ms 7 May 2025 352nd HumanoidCPU 0 96 160ms 28 hours ago 354th Shanethegamer 🇺🇸 0 98 7ms 6 May 2025 355th snydej 0 99 43ms 22 Nov 2024 355th albanian-laundromat 0 99 343ms 4 days ago 355th dokutan 0 99 409ms 16 hours ago 358th dokutan 0 100 19ms 16 hours ago 359th HumanoidCPU 0 101 361ms 6 hours ago 359th HumanoidCPU 0 101 382ms 4 hours ago 361st sean-niemann 🇺🇸 0 102 286ms 8 May 2025 361st Shanethegamer 🇺🇸 0 102 307ms 8 May 2025 361st edsrzf 🇳🇿 0 102 295ms 9 May 2025 361st GolfingSuccess 🇬🇷 0 102 306ms 9 May 2025 361st ovs-code 🇩🇪 0 102 311ms 13 Dec 2025 361st kg583 🇺🇸 0 102 13ms 25 Jan 2026 361st CaedenHarper 🇨🇦 0 102 301ms 4 days ago 361st fuzzylojik-golf 🇺🇸 0 102 292ms 2 days ago 361st emgordon154 0 102 274ms 22 hours ago 370th lukechampine 0 103 301ms 7 Jun 2025 370th chris124567 0 103 294ms 8 Jun 2025 370th albanian-laundromat 0 103 270ms 16 Dec 2025 370th GolfingSuccess 🇬🇷 0 103 336ms 14 Jan 2026 370th HumanoidCPU 0 103 329ms 3 hours ago 375th UnderKoen 🇳🇱 0 107 2,121ms 15 hours ago 376th GolfingSuccess 🇬🇷 0 111 107ms 2 hours ago 377th retrohun 0 112 16ms 38 hours ago 378th edsrzf 🇳🇿 0 114 30ms 9 hours ago 379th prestosilver 🇺🇸 0 115 418ms 37 hours ago 379th HumanoidCPU 0 115 260ms 3 hours ago 381st emgordon154 0 116 69ms 2 mins ago 382nd GolfingSuccess 🇬🇷 0 117 34ms 25 Dec 2025 383rd emgordon154 0 119 56ms 23 hours ago 383rd not-a-pokemon 0 119 15ms 13 hours ago 385th edsrzf 🇳🇿 0 127 58ms 18 hours ago 386th saito-ta 🇯🇵 0 128 1,990ms 8 May 2025 387th CaedenHarper 🇨🇦 0 129 446ms 4 days ago 388th Natanaelel 🇸🇪 0 130 360ms 2 May 2025 389th edsrzf 🇳🇿 0 134 22ms 2 hours ago 390th Shanethegamer 🇺🇸 0 136 315ms 26 Nov 2024 391st albanian-laundromat 0 137 27ms 4 days ago 392nd GolfingSuccess 🇬🇷 0 138 336ms 8 May 2025 393rd GolfingSuccess 🇬🇷 0 140 94ms 7 hours ago 393rd edsrzf 🇳🇿 0 140 29ms 3 hours ago 395th canissimia 🇦🇶 0 143 15ms 22 hours ago 396th emgordon154 0 150 15ms 9 May 2025 396th albanian-laundromat 0 150 28ms 4 days ago 396th HumanoidCPU 0 150 4ms 2 hours ago 399th kasarino 0 157 12ms 10 hours ago 400th JOrE20 0 159 69ms 14 Feb 2026 First Prev 321–400 of 411 Next Last