1. d2d4  1... g8f6  2. c1g5  2... d7d5  3. b1d2 The Torre Attack is a dangerous weapon for  White. It was once a favourite opening of the ninth world champion Tigran  Petrosian. 3... b8d7  4. g1f3  4... h7h6  5. g5h4  5... c7c5  6. e2e3  6... e7e6  7. c2c3  7... f8e7  8. f1d3  8... d8c7  9. d1e2  9... e8g8  10. e1g1  10... b7b6  11. h4f6 For her intended set-up Tan does not  need this bishop. 11... d7f6 