More PCG with 4.Bc4 and 5.Ng5

At his Contre Gambit Philidor blog, Frederic Fournier analyzes the position after 1.e4 e5 2.Nf3 d6 3.d4 f5 4.Bc4 Nc6 5.Ng5 Nh6 6.O-O Nxd4 7.c3 f4 8.Nxh7 Ng4, recommending two lines:

a) 9.cxd4 Qh4 (9...Nxh2? 10.Qh5+ +-) 10.h3 Qxh7 11.Qb3 +=;

b) 9.h3 Rxh7 10.cxd4 Qh4 11.Qb3 exd4 12.Bg8 (threatening 13.Qf7+ +/-) Ne5 13.Bxh7 Qxh7 14.Bxf4 Qxe4 15.Bxe5 dxe5 16.Nd2 (with the idea of Rae1 and Nc4) +/-.


But Black does better to omit ...Qh4 until White captures with hxg4. For example, 9.cxd4 Rxh7 10.h3 c6 11.hxg4 (11.Qb3 Nh6=) Qh4 12.f3 Be7 13.Qb3 g6 yields Black a dangerous attack.

The same position arises after 9.h3 Rxh7 10.cxd4 c6 11.hxg4 Qh4, etc.

Instead of 8...Ng4, Fritz8 prefers 8...Bg4 9.f3 Be6 10.Nd2 Bxc4 11.Nxc4 Ne2+ 12.Qxe2 Rxh7 which is slightly better for Black.