If you play for the drop and your opponent is holding Qxx, you’re not likely to get it.
When running a suit, you can capture a high card by playing low cards towards your high cards with your highest cards in reserve. (a.k.a: the finesse)
- Play high card from South towards North’s ace and king. If the queen does not play in West, allow it to continue as the high card into East. You have a 50/50 chance of winning the trick, but you’ll know the queen is in West if it wins.
- Transfer back to South, and continue to play from South towards North until the queen is played, taking it with either of your high cards.