Hexadoku

Think you've mastered classic Sudoku? HexaDoku takes the concept much further, using a 16×16 hexadecimal grid where you must place the following symbols: 0 1 2 3 4 5 6 7 8 9 A B C D E F Each row, column, and 4×4 block must contain all the symbols without repetition. Get ready for one of the greatest logic challenges ever created for Android devices.