1.g4
Grob's Attack or, "The Spike"
1...e5
In my opinion, the best reply because it stops Bg2 [1...d5!?
2.Bg2
Bxg4
A sifnificant error; white drums up an immediate attack 3.c4
c6
(3...dxc4
4.Bxb7
) 4.Qb3
]
2.Bg2!?
Grob suggested 2.d3 as an improvement [2.f4??
Qh4#
; 2.d3
]
2...h5
Here's the key move, immediately challenging the g4-pawn. It cannot push through (g5 Qxg5) and Defending it with h3 also lose
3.gxh5
[3.h3
hxg4
4.hxg4
Rxh1
5.Bxh1
Qh4
6.Bf3
e4
7.Bxe4
Qxg4
; 3.g5?
Qxg5
]
3...Qg5
Diagram Grob felt that Rxh5 was strong enough that 2.d3 was needed, but Qg5 seems even stronger
4.Bf3
[4.Kf1
Perhaps Kf1 is white's best hope, but it is, of course, quite a concession this early in the game.]
4...Qh4
Idea e5-e4
5.e4
[5.d3
]
5...Bc5
*