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  10. d1c2  10... d8c7 [%c_effect c7;square;c7;type;GreatFind;persistent;true] This is the idea of not developing the knight on c6 so soon. 11. b1d2  11... b8d7  12. a1c1 [%c_effect c1;square;c1;type;Inaccuracy;persistent;true] Another case of the \"wrong rook.\" I think it was Capablanca that once gave the right advice whenever you are in doubt about which rook you should move to a given file: \"Decide which rook looks the most natural to you. Then play the other one\". 12... b7b5  13. a2a4 