Colle system

Colle system

1. d4 d5 2. Nf3 Nf6 3. e3 e6 4. Bd3 c5 5. c3

Colle system

1. d4 d5 2. Nf3 Nf6 3. e3 e6 4. Bd3 c5 5. c3

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