[Event "St. Petersburg"] [Site "?"] [Round "0"] [White "Von Freymann"] [Black "Alekhine"] [Result "0-1"] [ECO "D02"] [Opening "Queen's Pawn: 2.Nf3 Nf6"] 1. d4 d5 2. Nf3 Nf6 3. c4 e6 4. Bg5 h6 5. Bh4 {Taking the dark squared bishop away from the queenside allows Black to take the c-pawn. Better was to play 5. Bxf6. 5.Bxf6 Qxf6} 5... dxc4 { 5...Bb4+ Developing another piece before taking the pawn might be more precise. } 6. Qa4+ {6.e3 Bb4+ 7.Nc3 b5 allows Black to keep his extra pawn.} 6... Nbd7 7. Qxc4 c5 8. Nc3 a6 {Black's idea is to fianchetto his light-square bishop on b7 after advancing his pawn to b5.} 9. a4 {An interesting mistake since it appears that White has foiled Black's intended pawn advance. 9.e3 Preparing to develop the light squared bishop was better. Although after 9... b5 10.Qb3 Bb7 Black would have a good game due to his well placed pieces and pressure on White's center.} 9... b5 10. Qd3 {10.axb5 would be a big mistake since after 10...axb5 11.Qxb5 Rxa1+ Black would be a rook ahead.} 10... c4 11. Qb1 Bb7 { With this move Black sacrifices his b-pawn in order to gain a lead indevelopmen t.} 12. axb5 axb5 13. Nxb5 Bb4+ 14. Nc3 g5 15. Bg3 Ne4 16. Qc1 Nb6 { With the idea of putting more pressure on White's pinned knight with 17..Na4 .} 17. Rxa8 Qxa8 18. Nd2 Nxd2 19. Kxd2 Qa2 {With the idea of playing 20... Na4 putting more pressure on White's pinned knight.} 20. Kd1 Qb3+ 21. Qc2 Bxc3 22. bxc3 Be4 {A nice decoying move which forces White to exchange queens giving Black a passed b-pawn.} 23. Qxb3 cxb3 24. e3 {24.Kc1 Trying to stop the b-pawn from promoting would fail to 24...Nc4 when Black plays 25...b2+ and then promotes the pawn on b1.} 24... b2 { White resigned since he can't stop Black's b-pawn from promoting.} 0-1