(threatening 33...Bxe2+) 33.Rxd1 Rxd4 34.exd4 Qh5 35.Be3 Qf3+ 36.Ke1 Re8 37.Kd2 Nf2 (Ossip Bernstein) or (b) 32...Rxd4 33.exd4 g5!34.fxg6 Qh5!, when Black avoids being mated and himself threatens 35...Qf3+ and mate next move.