Dear Mr. Wolff: You hold ? K-Q-10-4, ? 8-7-6-4, ? K-9-4-2, ? 5 and pass as dealer at favorable vulnerability. The next player opens one diamond and partner makes an unusual two-no-trump overcall to show hearts and clubs. What will you do when the next hand passes?

— Good Fit, Pueblo, Colorado

Answer: My pointed-suit honors are facing partner’s short suits, but they stand to cover one of his losers. I do have four-card support and the singleton club could prove useful for ruffing the opponents’ cards in partner’s side-suit. I think I owe partner more than a call of three hearts, so I would either bid game or cue-bid three diamonds as an unspecified game try, planning to pass a three-heart response. You could bid this way with a club fit instead of a heart fit, planning to correct partner’s three-heart call to four clubs.

Dear Mr. Wolff: A lot of my bridge friends play Precision Club. What are the advantages of this system over natural Standard American methods?

— Strong Club, Huntington, West Virginia

Answer: The main upside is for the strong slam-going hands. Precision pairs get to start their investigation by opening one club. The rest of us have to open two clubs, losing an entire level of bidding. Lighter openers (and the knowledge that partner is limited) also allow you to get more into your opponents’ faces. I favor a natural approach, but I’m aware that being able to relay out to show the exact shape can work very well sometimes.

Dear Mr. Wolff: How important would you say it is to have a system file in your partnership?

— Memory Strain, Olympia, Washington

Answer: In serious partnerships, it is crucial to write down all of your agreements in one place. You are apt to forget them otherwise. I find it also is good practice to write out your methods so as to find any holes or ways you can improve what you play.

Dear Mr. Wolff: With this hand: ? K-Q-9-7-3, ? J-5, ? Q-5-4, ? Q-J-2, in third position, non-vulnerable, would you open one spade?

— Gimcrack, Portland, Oregon

Answer: I am somewhat ambidextrous; I would certainly cut off my left hand before passing. I’m not sure about my right. Yes, open the bidding when you have a decent suit in third seat at all forms of scoring and vulnerabilities with the slightest excuse — and sometimes without. I’m glad you didn’t ask if I might open in first chair.

Dear Mr. Wolff: How does one show a void in response to Roman Key-Card Blackwood?

— Matter of Agreement, Hartford, Connecticut

Answer: If you have already shown the void, or your void is not useful — either because partner has shown the ace or your void is in partner’s long suit — ignore the void. If the void is useful and you are willing to force to the slam-level, bid five no-trump to show two key-cards with a void somewhere. Make a six-level bid with an odd number, bidding the suit of your void if possible, or six of your trump suit if the void is in a higher suit than your trump suit. With no aces, I’d conceal the void.

Contact Bobby Wolff at bobbywolff@mindspring.com