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 401st UnderKoen 🇳🇱 0 107 2,121ms 29 hours ago 402nd edsrzf 🇳🇿 0 109 21ms 11 hours ago 403rd Steffan153 🇫🇮 0 110 28ms 42 mins ago 404th GolfingSuccess 🇬🇷 0 111 107ms 15 hours ago 405th retrohun 0 112 16ms 2 days ago 405th edsrzf 🇳🇿 0 112 27ms 13 hours ago 407th edsrzf 🇳🇿 0 114 30ms 23 hours ago 408th prestosilver 🇺🇸 0 115 418ms 2 days ago 408th HumanoidCPU 0 115 260ms 17 hours ago 408th emgordon154 0 115 73ms 4 hours ago 411th GolfingSuccess 🇬🇷 0 117 34ms 25 Dec 2025 412th HumanoidCPU 0 118 14ms 12 hours ago 413th emgordon154 0 119 56ms 37 hours ago 413th not-a-pokemon 0 119 15ms 26 hours ago 415th edsrzf 🇳🇿 0 127 58ms 32 hours ago 416th saito-ta 🇯🇵 0 128 1,990ms 8 May 2025 417th CaedenHarper 🇨🇦 0 129 446ms 4 days ago 418th Natanaelel 🇸🇪 0 130 360ms 2 May 2025 419th edsrzf 🇳🇿 0 134 22ms 16 hours ago 420th Shanethegamer 🇺🇸 0 136 315ms 26 Nov 2024 421st albanian-laundromat 0 137 27ms 4 days ago 422nd GolfingSuccess 🇬🇷 0 138 336ms 8 May 2025 423rd GolfingSuccess 🇬🇷 0 140 94ms 21 hours ago 424th canissimia 🇦🇶 0 143 15ms 36 hours ago 425th emgordon154 0 150 15ms 9 May 2025 425th albanian-laundromat 0 150 28ms 4 days ago 427th kasarino 0 157 12ms 24 hours ago 428th JOrE20 0 159 69ms 14 Feb 2026 429th emgordon154 0 162 1,822ms 14 hours ago 430th RYSF13 🇨🇳 0 168 13ms 25 Jun 2025 431st Shanethegamer 🇺🇸 0 197 1,442ms 1 Feb 2025 432nd emgordon154 0 199 1,419ms 20 hours ago 433rd voytxt 🇨🇿 0 200 1,425ms 6 Feb 2026 433rd GolfingSuccess 🇬🇷 0 200 1,407ms 39 hours ago 435th albanian-laundromat 0 235 112ms 17 hours ago 436th ovs-code 🇩🇪 0 237 107ms 19 hours ago 437th albanian-laundromat 0 243 15ms 4 days ago 438th JOrE20 0 381 2,653ms 29 Dec 2025 439th CaedenHarper 🇨🇦 0 853 550ms 3 days ago First Prev 401–439 of 439
UnderKoen
🇳🇱
edsrzf
🇳🇿
Steffan153
🇫🇮
GolfingSuccess
🇬🇷
retrohun
prestosilver
🇺🇸
HumanoidCPU
emgordon154
not-a-pokemon
saito-ta
🇯🇵
CaedenHarper
🇨🇦
Natanaelel
🇸🇪
Shanethegamer
🇺🇸
albanian-laundromat
canissimia
🇦🇶
kasarino
JOrE20
RYSF13
🇨🇳
voytxt
🇨🇿
ovs-code
🇩🇪