When destroying Yagura castle with a silver in hand, it is best to drop at S*52 rather than S*41.1S*52From here you can win the gold. If the gold tries to escape you can win the bishop.1.S*41If S*41 is played, the gold on 32 can simply run to 31 while the silver will be trapped.2.G-31The silver could try to attempt a vain attack on either of the bishop or the gold on 43 however those can also be easily sidestep meanwhile the silver will be further away from the king.3.S-52+3.S-52=4.G-534.B-642G-533S-41+