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.