White advances his (or her) King's Knight's
Pawn to KKt4(g4), planning a
2.B-Kt2(g2) attack.
This irregular flank opening analysed by Swiss
player Henry Grob (1904-79) - "Spike" refers to his newspaper column
days - offers Black the centre and so White must employ a high degree of
tactical skill to work the attack to his advantage.
W-Alt.