Using pure logic and requiring no math to solve, Hashi is an addictive logic puzzle. The goal is to connect all islands of different numbers to one another, so that there are no more than two bridges in the same direction and all bridges are interconnected enabling passage from any island to another. Hashi is also known as Bridges and Hashiwokakero. Volume #6 This book contains 200 Hard 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. We never duplicate a logic puzzle in any of our books. Our books are printed on high quality 60 lb paper. Find more pencil puzzle books on Brainy's website! www.BrainysLogicPuzzles.com