Discards
When you no longer have a card in the suit being played, you must play (discard) a card of a suit other than the one led.
which card should you choose? :
- The Declarer discards, keeping his long suits, his honors and open communications
- Playing defence, don't discard the Declarer's long suit and keep an eye on dummy.
Your P is going to cash 4 ♠ tricks.
Keep your ♣, Declarer needs to establish ♣ tricks, discard ♦ - they are worthless!