Large Print Sudoku 16x16 - 100 Medium PuzzlesUnlike classic Sudoku, Sudoku 16x16 is based on a 16x16 grid, and the object is to place the numbers 1 to 16 in the empty squares so that each row, each column, and each 4x4 box contains the same number only once.There are 100 medium hexadoku puzzles in this book.Though the level is medium, due to the large grid and the quantity of logic numbers to place, it is still a great way to challenge and exercise your brain.