Black had a curious defence, involving the sacrifice of the h6-pawn: 19...f5! 20.Qxh6 (20.exf6? Bxf6 would be strong if 21.Qxh6? wasn’t refuted by 21...Qxe3+) 20...Kf7! (with the idea of winning the queen by 21...Rh8) 21.Qh7+ Ke6 (now the threat is to repeat moves, starting with 22...Rh8) 22.Bh4! Qf7 23.Qxf7 Rxf7 24.Bxe7 Rxe7 – now White has an extra pawn and a decent advantage, but the win is far from assured.

To exchange the best black piece.

Kashdan sacrifices the e5-pawn to quickly get his rooks into play. 22.exf4, with the idea of taking on g6 and playing f4- f5 again in order to permanently eliminate the black pawns on g6, was also strong.

Black resigned.