The Auction
West opened the balanced 16 HCP hand with a routine 1NT, and holding game–going values and 4=3 in the majors, East responded with Puppet 3♣. West rebid 3♦ to deny a 5–card major, and East rebid 3♥ to show the 4–card spade suit. Now, in “standard” Puppet opener’s 3♦ rebid would promise one or both majors, and after East’s 3♥ rebid opener’s 3NT would both deny a spade fit and implicitly reveal the 4–card heart suit. As it was, E/W were playing LIPS. Opener’s 3♦ rebid was duly alerted, and when North asked for an explanation, East replied that while it did deny a 5–card major, opener did not necessarily hold a 4–card major.
The Play
After a “standard” Puppet auction, a North defender might have been discouraged from leading a heart. A diamond lead would not have hurt the defense, and even with the ♥Q onside, declarer would have been held to three tricks in the suit. On the actual auction, our North elected to lead a heart, declarer ducked in dummy, and the ♥8 won the trick! Declarer then ran the ♦J to establish two diamond tricks, and in desperation North returned the ♠Q.
South ducked to avoid setting up two offensive spade tricks immediately. Declarer won the ♠K, finessed the ♥J and unblocked the ♥K, then returned to hand with a diamond and continued the ♠10 to set up the ♠J. South won, but that was the last trick for the defense. Declarer won the diamond return, cashed the ♥A, and claimed. Three clubs, two diamonds, four hearts, and two spades brought eleven tricks home and +460 for a cold, cold top.
Closing Thoughts
Dear Reader, we use “regular” Stayman 2♣ over an opening 1NT if we hold 4–4 in the majors. This is why it is safe for opener’s 3♦ rebid over a Puppet 3♣ response to deny a 5–card major without revealing whether or not there also is at least one 4–card major. This is not the case over an opening 2NT, where 2♣ is not available. So while we may fruitfully adopt LIPS over an opening 1NT, over 2NT we revert to “standard” Puppet, where opener’s 3♦ rebid both denies a 5–card major and promises at least one 4–card major.
Finally, in this February 2020 Bridge Winners article, Richard Granville remarks that if responder uses LIPS instead of “regular” Stayman 2♣ for hands with 4=2 or 2=4 in the majors, then “… the auction 1NT – 2♣ – 2♦ – 3NT can only be based upon 4–4 in the majors. Although this information is of no interest to opener, it's very useful for the opponents, who would therefore have to be alerted. Thus, if the opening leader had a close choice (under normal circumstances) between leading a major suit or a minor, he would tend to choose the minor suit.” There is a vigorous discussion in the article’s Comments section (39 of them!) for those with interest in further arcane details.
All the best,
Rex
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