[Event "Baden-Baden"] [Site "?"] [Round "0"] [White "Alekhine"] [Black "Marshall"] [Result "1-0"] [ECO "D06"] [Opening "QGD: Marshall Defence, 3.cxd5 Nxd5"] {The Kingside majority on the attack} 1. d4 d5 2. c4 Nf6 3. cxd5 Nxd5 4. e4 Nf6 5. Bd3 e5 6. dxe5 Ng4 7. Nf3 Nc6 8. Bg5 Be7 9. Bxe7 Qxe7 10. Nc3 Ncxe5 11. Nxe5 Qxe5 (11... Nxe5 12. O-O O-O 13. Be2 Be6 {Black's Queenside majority would then have been certainly no less strong than White's on the Kingside. After Black's actual move, the White majority can roll forward with the gain of tempo}) 12. h3 Nf6 13. Qd2 $1 Bd7 14. Qe3 { Prevents Queenside castling and prepares Pf4} 14... Bc6 15. O-O-O O-O 16. f4 Qe6 (16... Qa5 17. e5 Nd5 18. Nxd5 Bxd5 19. Bxh7+ Kxh7 20. Qd3+ {(Alekhine)}) 17. e5 Rfe8 {else Pf5} 18. Rhe1 Rad8 19. f5 Qe7 20. Qg5 Nd5 21. f6 Qf8 22. Bc4 Nxc3 (22... h6 23. fxg7) 23. Rxd8 Rxd8 24. fxg7 Nxa2+ (24... Qe8 25. Bxf7+ Kxf7 26. Rf1+ Ke6 27. Rf6+ Kd5 28. Rf8) 25. Kb1 Qe8 26. e6 Be4+ 27. Ka1 f5 (27... fxe6 28. Bxe6+ Qxe6 29. Qxd8+ Kxg7 30. Qd4+) 28. e7+ Rd5 29. Qf6 Qf7 30. e8=Q+ 1-0