 However, 28...Rf4 also seems to present White with an opportunity to win back a pawn or expose Black's king with 29.Re1+ and now (a) 29...Ne5 allows 30.Qxb7+; (b) 29...Re4 allows 30.Rxe4+ Qxe4 31.Qxa7 Qe1+ 32.Qg1; and (c) 29...Kf6?allows 30.Qh8+, forcing 30...Kf5 or 30...Kg5.Lured by this possibility, White played 29.Re1+?