Black cannot play 12-16, as 27-24 would win a piece.
(3) … 27-32 (4) 28-24
Again 12-16 is not possible on account of 32-27 winning a piece in three moves.
(4) … 23-18
32 31 30
+———————————————————-+
| | oo | | | | | | | 29
|———————————————————-|
28 | | | | | | | | |
|———————————————————-|
| | ** | | | | | | | 21
|———————————————————-|
20 | | | | | oo | | | |
|———————————————————-|
| | | | | | | | | 13
|———————————————————-|
12 | * | | | | | | | |
|———————————————————-|
| | | | | | | | | 5
|———————————————————-|
4 | | | | | | | | |
+———————————————————-+
3 2 1
DIAGRAM 94.
White played 32-28 Black would exchange by five 24-19 and draw the game.
In the position of the Diagram Black has the choice between 24- 20, 12-16, 24-19 or 24-28, but he loses, no matter what move he makes as demonstrated below.
(A) (5) 24-20 32-27 (6) 20-16 18-15 (7) 16-20 15-18 (8) 12-16 18-15