Heading for the protected square at f6.

1...0-0-0?! 2.Rxg3! hxg3 3.Nxe5 with compensation – Alekhine.

By using some minor tactics White secures the e5-pawn.

Winning a pawn, and soon the game as well.

Giving up the exchange in order to seize the weak dark squares on the enemy kingside.

The most powerful recapture, which vacates the f4-square for the knight.

Thanks to his grip on the dark squares, Black is much better. The game continued:

Followed by ...h5-h4, and Black went on to win.

Clearing the way for the rook towards the weak square at c6.

Seizing the seventh rank.