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Chess Openings Trainer

The Opening Explorer is a great tool for exploring the most comprehensive chess database online and learning from the greatest players of all time. Now the Opening Explorer has the best companion: the Chess Openings Trainer. Expanding your opening repertoire has never been easier or more fun.

A12: English, London defensive system
1. Nf3 d5 2. c4 c6 3. b3 Nf6 4. g3 Bf5

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