Chess: Understanding Petroff's Defense

1 e4 e5 2 Nf3 Nf6 3 Nxe5 d6 4 Nf3 Nxe4
5 Nc3:



5 ... Nf6 6 d4 Be7 7 Bd3 O-O
8 h3 Nc6 9 a3 Re8 10 O-O h6
11 Re1 Bf8 12 Rxe8 Qxe8
13 Nb5 Qd8.



5 ... Nf6 6 d4 Be7 7 Bd3 O-O
8 h3 Nc6 9 a3 Re8 10 O-O h6
11 d5 Ne5 12 Nxe5 dxe5
13 Re1 Bc5 14 Qf3 Bd4
15 Nb5 e4.



5 ... Nf6 6 d4 Be7 7 Bd3 O-O
8 h3 Nc6 9 a3 Re8 10 O-O d5
11 Bf4 Nh5 12 Be3 a6
13 Ne5 g6 14 Qf3 Nxe5
15 dxe5 d4.



5 ... Nf6 6 d4 Be7 7 Bd3 O-O
8 h3 Nc6 9 a3 Re8 10 O-O Be6
11 d5 Nxd5 12 Nxd5 Bxd5
13 Bxh7+ Kxh7 14 Qxd5.



5 ... Nf6 6 d4 Be7 7 Bd3 O-O
8 h3 Nc6 9 d5 Nb4 10 Bc4 c6
11 O-O Nbxd5 12 Nxd5 Nxd5
13 Bxd5 cxd5 14 Qxd5 Be6
15 Qxb7 Bf6.



5 ... Nf6 6 d4 Be7 7 Bd3 O-O
8 h3 Nc6 9 d5 Nb4 10 Bc4 c6
11 O-O Bf5 12 dxc6 Nxc2 13 cxb7.



5 ... Nf6 6 d4 Be7 7 Bd3 O-O
8 h3 Nc6 9 d5 Nb4 10 Bc4 c6
11 O-O Bf5 12 dxc6 Nxc2
13 Nh4 Nxa1 14 Nxf5.



5 ... Nf6 6 d4 Be7 7 Bd3 O-O
8 Ne2 Re8 9 O-O Nc6 10 c3 Bf8
11 Ng3 h6 12 Bc2 d5 13 Bf4 Bd6
14 Bxd6 Qxd6 15 Qd3 Bg4 16 h3 Be6
17 Rfe1 Re7 18 Ne5 Rb8 19 Nh5 Ne4.



5 ... Nf6 6 d4 Be7 7 Bd3 O-O
8 Ne2 Re8 9 O-O Nc6 10 c3 Bf8
11 Ng3 h6 12 Bc2 d5 13 Bf4 Bd6
14 Bxd6 Qxd6 15 Qd3 Qf4 16 h3 g6
17 Rae1 Re6 18 Re3 Bd7 19 Rfe1 Rae8
20 b3 Kg7.



5 ... Nf6 6 d4 Be7 7 Bd3 O-O
8 Ne2 Re8 9 O-O c5 10 d5 Bg4
11 c4 Nbd7 12 Ng3 Ne5 13 Be2 Nxf3+
14 Bxf3 Qd7 15 h3 Bxf3 16 Qxf3 b5.



5 ... Nf6 6 d4 Be7 7 Bd3 Bg4
8 h3 Bh5 9 Bf4 O-O 10 g4 Bg6
11 Qd2 Nc6 12 Bxg6 hxg6
13 d5 Ne5 14 Bxe5 dxe5
15 Nxe5 Bd6.



5 ... Nf6 6 d4 Be7 7 h3 O-O
8 Bd3 Nc6 9 a3 Re8 10 O-O h6
11 Re1 d5 12 Be3 a5 13 Nb5 Be6
14 Ne5 Ne4 15 Qh5 Bf8 16 Rad1.