 The Dutch grandmaster Jan Hein Donner swindled future World Champion Bobby Fischer in similar fashion at the second Piatigorsky Cup tournament (had Fischer won, he would have tied with Boris Spassky for first place).In the position at right Black, a pawn behind, has just played 29...Qf5, attacking White's rook and hoping for the obvious 30.Bd3?which seems at first glance to win a second pawn, e.g.