1. d2d4  1... g8f6  2. c1g5  2... d7d5  3. e2e3  3... c7c5 This variation is considered one of Black's best options against the Trompowsky. 4. g5f6  4... g7f6  5. d4c5  5... e7e6  6. g1f3  6... f8c5  7. f1e2  7... e8g8  8. e1g1  8... c5e7 [%c_effect e7;square;e7;type;Interesting;persistent;true] A clever move, probably prepared beforehand. The bishop is useful on e7, as it can later be positioned on f6 (with f6-f5 and then Bf6). Meanwhile, Black fights against White's most active plan (c2-c4) by preparing to exchange queens. 9. c2c4  9... d5c4 