inaccessible to Black. (9) K-e8; (10) B-c7, K-f8; (11) Kt-f5, K-
e8; (12) Kt-g7, K-f8; (13) K-f6, K-g8; (14) K-g6, K-f8; (15) B-
d6, K-g8; (16) Kt-f5, K-h8; (17)

+---------------------------------------+
8 | | #K | | | | | | |
|---------------------------------------|
7 | | | | | | | | |
|---------------------------------------|
6 | | ^K | | ^Kt| | | | |
|---------------------------------------|
5 | | | ^Kt| | | | | |
|---------------------------------------|
4 | | | | | | | | |
|---------------------------------------|
3 | | | | | | | | |
|---------------------------------------|
2 | | | | | | | | |
|---------------------------------------|
1 | | | | | | | | |
---------------------------------------
a b c d e f g h

DIAGRAM 13.

B-a3. Again a waiting move. White cannot play Kt-h6 right away as
Black would be stalemate. (17) ..., K-g8; (18) Kt-h6, K-h8; (19)
B-b2 mate.

It is not possible to force a mate with King and two Knights, for