Challenge yourself with this entertaining collection of five brain-teasers. These puzzles range in difficulty from moderate to difficult, and span a range of clever conundrums: from calculating the number of cars on a race track to playing a variant of chess involving 8 bishops! Other puzzles include "Alpha Blocks", "Eight Counters" and "Naval Convoy", wherein the formation of an entire enemy convoy must be deduced based on the position of only 2 ships!