Petrovs Defense Classical Variation 106 Petrovs Defense Three Knights Game 29 Petrovs Defense 3.d3 Nc6 14 Petrovs Defense 3.d3 Nc6 4.Be2 10 Petrovs Defense Three Knights Game 3...Bb4 4 Petrovs Defense Classical Variation 3...d6 4.Nf3 3 Petrovs Defense Classical Damiano Variation Kholmov Gambit 5.Qxe4 3 Petrovs Defense Classical Cozio Attack 5...Qe7 6.d3 Nf6 3 Petrovs Defense Classical Cozio Attack 3 Petrovs Defense Three Knights Game 3...Bb4 4.Nxe5 2 Petrovs Defense Steinitz Attack 3...exd4 2 Petrovs Defense Classical Variation 3...d6 4.Nf3 Nxe4 2 Petrovs Defense Classical Paulsen Attack 2 Petrovs Defense Classical French Attack 2 Petrovs Defense 3.d3 Nc6 4.c3 2 Petrovs Defense Three Knights Game 3...Bb4 4.Bc4 O O 5.O O 1 Petrovs Defense Steinitz Attack 3...exd4 4.e5 1 Petrovs Defense Classical Variation 3...d6 1 Petrovs Defense Classical Paulsen Attack 4...Nxe4 1 Petrovs Defense Classical Nimzowitsch Attack 1 Petrovs Defense Classical French Attack 5...Nf6 1 Petrovs Defense Classical Damiano Variation Kholmov Gambit...6.d4 dxe5 7.dxe5 Nc6 1 Petrovs Defense Classical Damiano Variation Kholmov Gambit 5.Qxe4 d6 1 Petrovs Defense Classical Cozio Attack...8.Bxe2 Be7 9.Nc3 h6 1 Petrovs Defense Classical Cozio Attack...7.Bg5 Qxe2 8.Bxe2 Be7 1 Petrovs Defense Classical Cozio Attack 5...Qe7 1