Yet another improvement

I was looking for improvements on my game last week, where my opponent was baffled by my audacious 1.d4 d5 2.e4 dxe4 3.Nc3 Nf6 4.f3 exf3 5.Nxf3 Bg4 6.h3 Bh5 7.g4 Bg6 8.Ne5 e6 9.Qf3 Nd5 10.Bb5+ c6 11.0-0.

My opponent choose the inferior 11...f6, but I realised black would get trhe upper hand aftre the correct 11...Nf6, as 12.Rf2 complicates things even further, but black remains on top after the simple 12...Be7.

But now I see that 11.0-0 is in fact the bad move ! 11.Rf1 (diagram) is much stronger.

a/ 11...Qh4+ 12.Kd1
...a1/ 12...cxb5 13.Nxd5 (++)
...a2/ 12...Nxc3+ 13.bxc3 (+=)
...a3/ 12...Be7 13.Nxd5 (+=)
...a4/ 12...f6 13.Nxd5 (++)

...a5/ 12...Qf6 13.Qg2 (=)

...a6/ 12...Qe7 13.Nxd5 (++)

...a7/ 12...Bd6 13.Nxg6 (++)

b/ 11...cxb5 12.Nxg6 (++)

c/ 11...Nf6 12.Be2 (=)

d/ 11...Qf6 12.Nxd5

...d1/ 12...exd5 13.Qxd5 (+=)

...d2/ 12...Qxf3 13.Nc7+ Kd8 14.Rxf3 Kxc7 15.Nxf7 (+)

e/ 11...f6 12.Nxg6 hxg6 13.Bd3 (=)

f/ 11...f5 12.Nxd5 

...f1/ 12...Qxd5 13.Qxd5 exd5 14.Bd3 (+=)

...f2/ 12...exd5 13.Bd3 (+=)

So it seems to me that 11.Rf1 is much stronger than 11.0-0. There is no advantage in sight for black and he will soon be drowning the terrible complications against a well prepared attacker.

Also, black can hold in three lines :

> 11...Qh4+ 12.Kd1 Qf6 Qg2

> 11...Nf6 12.Be2

> 11...f6 12.Nxg6 hxg6 13.Bd3

My next post will focus on these lines.