Speed: Bullet to Correspondence Rating:
Sicilian Defense: Scheveningen Variation, Keres AttackBETA
never wins the g4 pawn because white has Nf5 jumping deeper into black's camp.
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.