Sicilian Defense: Scheveningen Variation, Keres Attack

g4 launches a fast kingside attack against black with g5 next.

The Keres attack has long been considered the acid test against the Scheveningen since the 1970s. In fact, the idea of quickly playing g4-g5 to dislodge the f6-knight and begin a kingside assault has led some players at the top level to drop this line as black entirely.