Large Print Sudoku 16x16 - 100 Hard Puzzles Unlike classic Sudoku, Sudoku 16x16 (also called hexadoku) 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 hard puzzles in this book. Due to the large grid and the difficulty level, this book is a real challenge even for Sudoku experts.
ThriftBooks sells millions of used books at the lowest everyday prices. We personally assess every book's quality and offer rare, out-of-print treasures. We deliver the joy of reading in recyclable packaging with free standard shipping on US orders over $15. ThriftBooks.com. Read more. Spend less.