WHEN TO DRAW THE REMAINING TRUMPS
When you are left with but one remaining trump, and that the commanding one, usually lead it to draw the losing trumps.
When there are but two other remaining trumps, trust that your trump lead will find them divided. If you have reason to know that both are in one hand, one must of course make; but lead the commanding trump, so that but one can make.
With the best trump in your hand and one against you, it is only in critical situations that you should refrain from drawing the losing trump. For instance, when the adversaries hold an established suit and the commanding card of your suit, it is a better play to clear your suit and then refuse a force until the adversary who holds the remaining trump cannot lead his partner’s suit. Take care, however, to accept the force at the right time, for a delay in trumping may allow the adversary to discard a losing card of your suit.