THE DEFENCE AGAINST OVERTAKING AND “DUCKING”
When you open a suit and find that it is dummy’s strength do not attempt to win the second trick if the dealer leads through your hand, that is, unless you can mark the dealer with no other card of the suit to lead; by taking the third round instead, you will often save a trick or two.
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In this case the dealer takes the first trick with the jack and leads the queen. No attempt should be made to cover the card. In this way the dealer is forced to win the third round and dummy’s suit is blocked.