This position occurred in a game between Sir G. A. Thomas of
London and the author. Black has just played Q-e7 in order to
protect the mate which was threatened by Ktxf6+ followed by Qxh7.
If in the position of the diagram White played Kt-f6+, Black
would retake with the Pawn, thereby protecting the Pawn h7 with
his Queen. However, White can force the mate with a neat Queen's
sacrifice which drives Black's King right into the arms of the
remaining White pieces. Play continued as follows:

(1) Qxh7+ Kxh7
(2) Ktxf6++ K-h6

The King cannot go to h8 on account of Kt-g6 mate. White now
continually checks Black's King in such a manner that he has only
one square to go to until he is finally driven to the first rank,
all White pieces participating in the chase.

(3) Kte5-g4+

In answer to Ktf6-g4+ Black would play K-h5; (4) B-g6+, K-h4; (5)
P-g3+, K-h3 and there is no mate.

(3) ... K-g5
(4) P-h4+ K-f4
(5) P-g3+ K-f3
(6) B-e2+ K-g2
(7) R-h2+ K-g1
(8) K-d2 mate.