The knight retreats so that the bishop on b2 enhances a future e4-e5 or f4-f5 advance.

Fighting for the d6-square.

White is winning.

A pawn sacrifice to create some activity before White consolidates.

4.cxd4 Ba6 5.Qc5 Qb7! with compensation – Tunik.

Black finally accepts the queen exchange, aware that he will soon be able to create new threats.

with equality.

A strong blow that prepares Rac1 with new threats and destroys Black's kingside before he castles into safety.

1....0-0? 2.Rac1 gxh6 3.Rxc4 , followed by 4 Rxc8 and 5 Qg4+
1...gxh6 2.Rac1 Qxd5 3.Bxc4 Qa8 4.Bd5! Qb8 5.Qxa6 Rxc1 6.Rxc1 yields White a clear advantage thanks to his active bishop and the strong passed pawn on a2.