Alekhine's Defence: 1.e4 Nf6 2.e5 Nd5 3.d4 d6 4.c4 Nb6 5.exd6 cxd6 6.Nc3 g6 7.a4 Bg7 8.a5 N6d7 9.Be3 [9.Nf3 Nc6 10.Ra3 Nxa5 11.d5 b6 12.b4 Nb7 13.Nd4 Nb8 14.Ncb5 a5 15.Be2 Qd7 16.Bf3 Na6 17.Nc6 axb4 18.Rxa6 Rxa6 19.Nb8 Ra1 20.Nxd7 Bxd7 21.0-0 Nc5 22.Qe2 0-0 23.g4 b3 Hanley,C (2331)-Grunberg,M (2445)/Port Erin 2002/CBM 090 ext/0-1 (31); 9.d5 0-0 10.Nf3 Na6 11.Be2 Nf6 12.h3 e6 13.0-0 exd5 14.cxd5 Nc5 15.Be3 Nfe4 16.Nxe4 Nxe4 17.Bd4 Ng5 18.Ne1 Nxh3+ 19.gxh3 Bxh3 20.Bxg7 Qg5+ 21.Kh2 Bxf1 22.Bc3 Qf4+ 23.Kg1 Bxe2 Cubas,J (2387)-Bronstein,L (2362)/Pinamar 2005/CBM 106 ext/½-½ (51)] 9...0-0 10.Nf3 e5N [10...Nc6 11.d5 Nce5 12.Nxe5 Bxe5 13.Be2 Nc5 14.Ra3 Bf5 15.0-0 b6 16.b4 Na6 17.Qb3 Qb8 18.axb6 axb6 19.c5 Nc7 20.cxb6 Rxa3 21.Qxa3 Bxc3 22.bxc7 Qxb4 23.Ra1 Kg7 24.Qxb4 Bxb4 25.Ra7 Lutz,K (2300)-Schneider,H/Doernigheim 1994/GER/1-0] 11.Be2 Black has a cramped position. Black's piece can't move: c8 11...Nc6 Black threatens to win material: Nc6xa5 12.d5 White threatens to win material: d5xc6 12...Ne7 13.Nb5 [13.0-0!?±] 13...Nf5² 14.Bxa7 e4 15.Nfd4 Ne5? [¹15...Nc5!? and Black could well hope to play on 16.Bb6 Qg5 17.Nxf5 Bxf5=] 16.Nxf5 Bxf5 17.Qd2?? forfeits the advantage [¹17.0-0+- White would have gained the upper hand] 17...Rxa7= 18.Nxa7 e3 19.Qxe3 Nd3+ 20.Kf1 [¹20.Bxd3!? might be a viable alternative 20...Re8 21.Bxf5 Rxe3+ 22.fxe3 Qh4+ 23.g3 Qxc4 24.Bd7=] 20...Re8µ 21.Qd2 Diagram
Updated Aug 2012