4.Qxd5?! Rxe2 5.Rxe2 Rxe2 6.Qxa5 Ng3! 7.Rf3 Qe4 with a strong attack.

5.bxc4? Qa4+ 6.Kc1 Ba3+ 7.Kb1 Rb6+ 8.Ka1 Qc2 -+

Eyeing the weak square on d3, thus forcing White to give up material.

Black enjoys a sound extra pawn.

Softening up the long diagonal for a future battery.

After 2...cxd5 3.Qd4 mate is inevitable, so Black has to give up a piece.

Keeping the queens in view of Black's exposed king.

With 6 Ra7 coming up, White has a decisive advantage.

Heading for h4 to enhance an attack on the white king.