Solitaire Module is the first expansion set for the Battle over Britain game series. (You must own Battle over Britain, or Faith, Hope & Charity: Battle over Malta to use this set.) As with all games in the series, planes are interchangeable. Includes twelve-page illustrated rules (advanced optional and solitaire rules, Poland 1939 and Netherlands 1940 campaign games), Reference Card, and set of 8 airplane counters. Planes included are Polish P-11C, British Supermarine Spitfire I, Bleinheim, Dutch Fokker D-XXI, Italian MC-200 Saetta, German He-111, Me-110C, and Hs-123. The game system is very solitaire friendly to begin with, and this expansion provides additional rules to enhance variation and fun.