Here are three hands where the defense depends on your card reading skills. These hands are all matchpoint scoring with BOSTON leads.
Hand 1 (you are East):
Hand 2 (you are South):
Hand 3 (you are East. North is a novice player):
Elementary Card Reading Quiz
1. Take heart winners and then lead back a small diamond.
2. partner did not lead your bid suit-spades, so his club lead is probably a singleton lead back a small club for a ruff.
3. North is out of clubs. Duck the night of clubs and overtake on the next club lead.