This one came from Wednesday 11/5 Week 19 of the X-Club deals. Don't check it out on the website before you look at the problem that I will put in front of you. Here it is:
You are declarer in 4S and the lead is the JACK OF DIAMONDS. How will you plan your play?
This is the set up when the dummy comes down:
Here is what a competent declarer should be thinking: where are my potential TRICKS and where are my potential LOSERS?