Give your brain a workout on the type of brainteasers that
challenge the best solvers at the World Puzzle Championships. They're
tough, but fun, and the feeling of satisfaction you get when you succeed
is simply unbeatable. Some of the puzzles are oldies but goodies, like
battleships--and its many variants--where you search for a fleet hidden
within a grid. In "Eminent Domain," try to determine which blanks cells
are owned by the numbered ones. For "Hex Loops," locate a path that
travels through adjacent hexagons: the trick is, it has to end where it
started, and the lines can't touch or cross. From Snaky Tiles to Spiral
Galaxies, these level conundrums will get your mind in
shape.