Know Your Customer

"Know your customer" is a good motto, irrespective of the setting. Nevertheless, at bridge, "knowing your customer" can often mean the difference between success and failure

In today's column, John Koch tells us about a regional barometer game where he and partner were doing well. As John plays a 3NT contract, he meshes the odds along with the likelihood of what his "customer for the round" would do.

Remember this, too. Keeping your opponents a bit off guard can aid your game. If it's tougher for your opponents to know who their customer is, then you have one more weapon to your advantage!|

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Comments

[Rainer Herrmann]

A good play from East would have been the D9
at trick one, even though this sometimes costs a trick if declarer has AJxx or ATxx.
However, declarer might have preferred a slower route to 3NT with these holdings.
Anyway declarer has two stoppers in diamonds with these holdings, East having no entry outside diamonds.
The value of playing the D9 is even more obvious when you exchange the D7 and the D8 in the actual layout.