Shikaku is a fun and challenging game. Some of the squares in the grid have a number. The objective is to divide the grid into rectangular and square sections such that each section contains exactly one number, that number represents the size of the rectangle or square. For instance a square with a 4 in it can have 4 squares running horizontally, vertically or form a 2x2 square. Volume 2 This book contains 200 Easy 10x10 puzzles, 4 per page. We are sure you will find these puzzles offer an entertaining yet effective way to exercise your brain and keep your mind sharp. All puzzles have been checked to ensure there is only one valid answer. Find more pencil puzzle books on Brainy's website www.BrainysLogicPuzzles.com