Black probably missed that 8...Bxb4 fails to 9.Qg4+-

9...Kg7 10.Bxg6!+-

White soon won.

Initiating a minority attack to soften up the white queenside.

Some clever prophylaxis, directed at 7...Kg7 8.Qe6 , which now fails to 8...Rxg2+! 9.Kxg2 Qxf3 10.Kh3 Bd7 -+

Preventing 9 Nf4 and overprotecting the d6-pawn.

With a slight initiative thanks to the more active pieces.

Softening up the c6-square for the knight.

1...Qxb4 2.axb7+-
1...Rxc3 2. axb7 Rb8 3.Nc6! Bxc6 4.dxc6 Rd3 5.Be3 the passed pawns are decisive – Polgar.