Zap!Chess "FlowHideBoxes" studying the fundamental principles of

studying the fundamental principles of the Sicilian Defense and its many variations

American IM and theoretical expert David Vigorito provides a full repertoire for Black with two options against the main lines

A soft black cover encloses the entire set when folded for storage

and the games are very well annotated

Zap!Chess "FlowHideBoxes" studying the fundamental principles ofZap! Chess is the commercial version of Zappa, the 2005 World Computer Chess Champion. The CD contains two versions: "Paderborn" and "Reykjavik". Reyjavik is the version that won the World Championship; Paderborn includes some ideas from my work at Illinois. I myself do not know which one is better; you'll have to find that out for yourself. The style of the program reflects my background as a computer engineer. Rather than developing clever search