Link to Wikipedia article about the Scotch Game.
Theory and Games
4...Bc5 and 4...Nf6 in the Scotch Game:
1.e4 e5 2.Nf3 Nc6 3.d4 exd4 4.Nxd4 Bc5 5.Be3 (5.Nxc6) 5...Qf6 6.c3 Nge7 7.Bc4 (7.g3 h5 and 7...d5 8.Bg2 dxe4, 8...Bxd4) 7...Ne5 (Or 7...0-0 8.0-0 and 7...b6 8.0-0) 8.Be2 Qg6 9.0-0 d6 (9...Qxe4 10.Nb5 Game Pokorna-Leite, 1996) 10.f3 0-0 11.Kh1
a) 11...Bb6 12.a4
a1) 12...a6 13.Qb3 Kh8 14.Nd2 Nd7 15.a5 Ba7 16.c4 Re8 17.Nc2 Bc5 18.Qc3 Qf6 19.Qxf6 Nxf6 20.Rfd1 White stands slightly better.
a2) 12...N5c6 13.Na3 Nxd4 (13...f5 Hao-Beliavsky, 2006) 14.cxd4 d5 15.Nb5 c6 16.Nc3 White stands slightly better. Najer-Jakovenko, 2006
a3) 12...a5 13. Na3 Van der Weide-Hopman, 2006 and 13.Nd2 Nedev-Arngrimsson, 2009
b) 11...f5 12.Nd2 Bb6 (12...fxe4 13.Qb3+ Qf7 14.Nxe4 Bb6 15.f4 Ng4 16.Bg1 White stands slightly better. Movsesian-Georgiev, 2002) 13.Qb3+ Kh8 14.a4 fxe4 15.fxe4 Bg4 16.Bxg4 Nxg4 17.Bg1 Nc6 Equal position. Amonatov-Geller, 2005
c) 11...d5
c1) 12.Nd2 dxe4 (12...Bb6 13.Bf4 Qf6 14.Bg3 c5 15.Nc2 Equal position. Hector-Sargissian, 2002) 13.fxe4 (13.Nxe4 Nd5 Equal position. Hector-K. Larsen, 2003; 13...Bb6 Milov-David, 2005) 13...Bg4 14.Bf4 Bxe2 15.Qxe2 Bd6 16.Rad1 Rae8 17.Bxe5 (17.Bg3 a6 18.N2b3 b5 Equal position. Rublevsky-Kobalia, 2005) 17...Bxe5 18.Qb5 Bxd4 19.cxd4 Qb6 Equal position. Nedev-Gustafsson, 2006
c2) 12.f4 Ng4 (12...Qxe4 13.Bg1 Movsesian-Hracek, 2001; 13.b4 Najer-Naiditsch, 2008) 13.Bg1 Movsesian-Eljanov, 2009
c3) 12.b4 Bb6 13.Nd2 dxe4 14.fxe4 Bg4 15.Bf4 Amonatov-Lenic, 2010
1.e4 e5 2.Nf3 Nc6 3.d4 exd4 4.Nxd4 Nf6 5.Nxc6 (5.Nc3) 5...bxc6 6.e5 Qe7 7.Qe2 7...Nd5 8.c4 Ba6 (8...Nb6 9.Nc3 Qe6 10.Qe4 Ba6 11.b3; 9...a5 10.Bd2) 9.b3 (9.Nd2) 9...g6 (9...Qh4 10.a3; 9...0-0-0 10.g3; 9...g5 10.g3) 10.f4
a) 10...Qb4+ 11.Bd2 Qb6 12.Nc3
a1) 12...Nxc3 13.Bxc3 Bb4 14.Bxb4 Qxb4+ 15.Qd2 White stands slightly better.
a2) 12...Bb4 13.Qd3 Bxc3 (13...Nxc3 14.Bxc3 Qa5 15.Bxb4 Qxb4 16.Qd2 White stands slightly better; 14...Bxc3+ 15.Qxc3 c5 16.O-O-O Hector-Olsen, 1999) 14.Bxc3 Nxc3 (14...Nxf4 15.Qd2 Ne6 16.0-0-0 0-0-0 17.Ba5 White has a clear advantage. Vukovic-Blagojevic, 1993) 15.Qxc3 White stands slightly better.
b) 10...Bg7 11.Qf2
b1) 11...Nb6 12.Ba3
b1a) 12...Qe6 13.Nd2 (13.Nc3; 13.c5 Demchenko-Kharchenko, 2008) 13...d6 14.0-0-0 0-0 15.Bd3 c5 16.Rhe1 Rad8 17.f5 gxf5 18.Bxf5 White has a clear advantage. Vorobiov-Obukhov, 1997
b1b) 12...d6 13.Nd2 (13.Nc3 G Jones-T Nixon, 2004) 13...0-0 14.0-0-0 Rfd8 15.Ne4 c5 16.Bd3 dxe5 17.f5 White has a clear advantage. Amonatov-Silivanov, 2004
b2) 11...Nb4 12.a3 Bxe5 13.fxe5 Qxe5+ 14.Kd1 (14.Qe2 Nc2+ 15.Kd1 Qxe2+ 16.Bxe2 Nxa1 17.Bb2 0-0 18.Bxa1 Rfe8 Unclear position) 14...Qxa1 15.axb4 Qxb1 16.Qe3+ Kd8 17.Qc3 Re8 18.Bd3 Qa2 19.Bb2 Bxc4 20.bxc4 c5 (21...a5 Dworakowska-Trabert, 2001) 21.Kd2 Qa6 22.bxc5 Qb7 23.Qf6+ Kc8 24.c6 Qxc6 (24...dxc6 25.Bc3 Unclear position) 25.Qxc6 dxc6 26.g4 a5 Equal position.
c) 10...f6 11.exf6 (11.Ba3 Nb4 12.Bb2 Bh6; 11...Qf7 12.Qd2 Nb6)
c1) 11...Nxf6 12.Bb2 0-0-0 (12...Bg7 13.Nd2 Qxe2+ 14.Bxe2 0-0 15.0-0-0 d5 16.Rhe1 Rad8 17.Bf3 White stands slightly better. Nataf-Daurelle, 2003; 12...Kf7 Goerlinger-Sarink, Correspondence 2002) 13.Nd2 Qf7 (13...d5 14.0-0-0 White has a clear advantage.) 14.0-0-0 Bg7 15.g3 Nd5 (15...Rhe8 16.Qf2 Kb8 17.Bh3 White stands slightly better.) 16.Ne4 Rhe8 17.Qf3 Bxb2+ 18.Kxb2 Qg7+ 19.Kc2 White stands slightly better.
c2) 11...Qxe2+ 12.Bxe2 Bb4+ 13.Bd2 Bxd2+ 14.Nxd2 Nxf4 15.Rf1 Nxe2 (15...Nxg2+ 16.Kf2 Nf4 17.Bg4 0-0 18.Kg3 Ne6 19.Rae1 Rae8 20.Ne4 Kh8 21.Nc3 White stands slightly better; 17...0-0-0 18.Kg3 Nd3 19.Nf3 White has a clear advantage. Rublevsky-Tseshkovsky, 2003) 16.Kxe2 Kf7 17.Kd3 Rae8 18.Rae1 (18.g4) 18...Rxe1 19. Rxe1 Kxf6 20. Ne4+ Equal position.
Theory and Games
4...Bc5 and 4...Nf6 in the Scotch Game:
1.e4 e5 2.Nf3 Nc6 3.d4 exd4 4.Nxd4 Bc5 5.Be3 (5.Nxc6) 5...Qf6 6.c3 Nge7 7.Bc4 (7.g3 h5 and 7...d5 8.Bg2 dxe4, 8...Bxd4) 7...Ne5 (Or 7...0-0 8.0-0 and 7...b6 8.0-0) 8.Be2 Qg6 9.0-0 d6 (9...Qxe4 10.Nb5 Game Pokorna-Leite, 1996) 10.f3 0-0 11.Kh1
a) 11...Bb6 12.a4
a1) 12...a6 13.Qb3 Kh8 14.Nd2 Nd7 15.a5 Ba7 16.c4 Re8 17.Nc2 Bc5 18.Qc3 Qf6 19.Qxf6 Nxf6 20.Rfd1 White stands slightly better.
a2) 12...N5c6 13.Na3 Nxd4 (13...f5 Hao-Beliavsky, 2006) 14.cxd4 d5 15.Nb5 c6 16.Nc3 White stands slightly better. Najer-Jakovenko, 2006
a3) 12...a5 13. Na3 Van der Weide-Hopman, 2006 and 13.Nd2 Nedev-Arngrimsson, 2009
b) 11...f5 12.Nd2 Bb6 (12...fxe4 13.Qb3+ Qf7 14.Nxe4 Bb6 15.f4 Ng4 16.Bg1 White stands slightly better. Movsesian-Georgiev, 2002) 13.Qb3+ Kh8 14.a4 fxe4 15.fxe4 Bg4 16.Bxg4 Nxg4 17.Bg1 Nc6 Equal position. Amonatov-Geller, 2005
c) 11...d5
c1) 12.Nd2 dxe4 (12...Bb6 13.Bf4 Qf6 14.Bg3 c5 15.Nc2 Equal position. Hector-Sargissian, 2002) 13.fxe4 (13.Nxe4 Nd5 Equal position. Hector-K. Larsen, 2003; 13...Bb6 Milov-David, 2005) 13...Bg4 14.Bf4 Bxe2 15.Qxe2 Bd6 16.Rad1 Rae8 17.Bxe5 (17.Bg3 a6 18.N2b3 b5 Equal position. Rublevsky-Kobalia, 2005) 17...Bxe5 18.Qb5 Bxd4 19.cxd4 Qb6 Equal position. Nedev-Gustafsson, 2006
c2) 12.f4 Ng4 (12...Qxe4 13.Bg1 Movsesian-Hracek, 2001; 13.b4 Najer-Naiditsch, 2008) 13.Bg1 Movsesian-Eljanov, 2009
c3) 12.b4 Bb6 13.Nd2 dxe4 14.fxe4 Bg4 15.Bf4 Amonatov-Lenic, 2010
1.e4 e5 2.Nf3 Nc6 3.d4 exd4 4.Nxd4 Nf6 5.Nxc6 (5.Nc3) 5...bxc6 6.e5 Qe7 7.Qe2 7...Nd5 8.c4 Ba6 (8...Nb6 9.Nc3 Qe6 10.Qe4 Ba6 11.b3; 9...a5 10.Bd2) 9.b3 (9.Nd2) 9...g6 (9...Qh4 10.a3; 9...0-0-0 10.g3; 9...g5 10.g3) 10.f4
a) 10...Qb4+ 11.Bd2 Qb6 12.Nc3
a1) 12...Nxc3 13.Bxc3 Bb4 14.Bxb4 Qxb4+ 15.Qd2 White stands slightly better.
a2) 12...Bb4 13.Qd3 Bxc3 (13...Nxc3 14.Bxc3 Qa5 15.Bxb4 Qxb4 16.Qd2 White stands slightly better; 14...Bxc3+ 15.Qxc3 c5 16.O-O-O Hector-Olsen, 1999) 14.Bxc3 Nxc3 (14...Nxf4 15.Qd2 Ne6 16.0-0-0 0-0-0 17.Ba5 White has a clear advantage. Vukovic-Blagojevic, 1993) 15.Qxc3 White stands slightly better.
b) 10...Bg7 11.Qf2
b1) 11...Nb6 12.Ba3
b1a) 12...Qe6 13.Nd2 (13.Nc3; 13.c5 Demchenko-Kharchenko, 2008) 13...d6 14.0-0-0 0-0 15.Bd3 c5 16.Rhe1 Rad8 17.f5 gxf5 18.Bxf5 White has a clear advantage. Vorobiov-Obukhov, 1997
b1b) 12...d6 13.Nd2 (13.Nc3 G Jones-T Nixon, 2004) 13...0-0 14.0-0-0 Rfd8 15.Ne4 c5 16.Bd3 dxe5 17.f5 White has a clear advantage. Amonatov-Silivanov, 2004
b2) 11...Nb4 12.a3 Bxe5 13.fxe5 Qxe5+ 14.Kd1 (14.Qe2 Nc2+ 15.Kd1 Qxe2+ 16.Bxe2 Nxa1 17.Bb2 0-0 18.Bxa1 Rfe8 Unclear position) 14...Qxa1 15.axb4 Qxb1 16.Qe3+ Kd8 17.Qc3 Re8 18.Bd3 Qa2 19.Bb2 Bxc4 20.bxc4 c5 (21...a5 Dworakowska-Trabert, 2001) 21.Kd2 Qa6 22.bxc5 Qb7 23.Qf6+ Kc8 24.c6 Qxc6 (24...dxc6 25.Bc3 Unclear position) 25.Qxc6 dxc6 26.g4 a5 Equal position.
c) 10...f6 11.exf6 (11.Ba3 Nb4 12.Bb2 Bh6; 11...Qf7 12.Qd2 Nb6)
c1) 11...Nxf6 12.Bb2 0-0-0 (12...Bg7 13.Nd2 Qxe2+ 14.Bxe2 0-0 15.0-0-0 d5 16.Rhe1 Rad8 17.Bf3 White stands slightly better. Nataf-Daurelle, 2003; 12...Kf7 Goerlinger-Sarink, Correspondence 2002) 13.Nd2 Qf7 (13...d5 14.0-0-0 White has a clear advantage.) 14.0-0-0 Bg7 15.g3 Nd5 (15...Rhe8 16.Qf2 Kb8 17.Bh3 White stands slightly better.) 16.Ne4 Rhe8 17.Qf3 Bxb2+ 18.Kxb2 Qg7+ 19.Kc2 White stands slightly better.
c2) 11...Qxe2+ 12.Bxe2 Bb4+ 13.Bd2 Bxd2+ 14.Nxd2 Nxf4 15.Rf1 Nxe2 (15...Nxg2+ 16.Kf2 Nf4 17.Bg4 0-0 18.Kg3 Ne6 19.Rae1 Rae8 20.Ne4 Kh8 21.Nc3 White stands slightly better; 17...0-0-0 18.Kg3 Nd3 19.Nf3 White has a clear advantage. Rublevsky-Tseshkovsky, 2003) 16.Kxe2 Kf7 17.Kd3 Rae8 18.Rae1 (18.g4) 18...Rxe1 19. Rxe1 Kxf6 20. Ne4+ Equal position.
