MFA, on Apr 29 2009, 01:20 PM, said:
I don't see why everything has to be so speculative. Double spade finesse is my first and only thought.
As you might guess, the decision to post was coloured by the actual layout. West had
♠KQxx so taking the double spade finesse was -150 while playing on hearts is +400. It's quite trivial at Imps -- take your best shot in spades -- but not at BaM.
If you believe the other table will be in 2NT and they will play on spades, what should you do? If you duplicate their line (& clubs are 4-4 as they strongly appear), 50% you win the board, 50% you lose.
If you play hearts, you win when you make, around 30-35%. If you are -50, you can tie or even win when the spade line goes badly. -50 beats -150.
So you win when you make OR West has
♠KQxx, which brings you to 50%. (Okay, that's a slight fudge)
You gain by tieing, while duplicating their line can never tie. Take the typical layout where East has
♠Hxxx and diamonds don't break. They will be -50 in 2NT, while you will be -50 in 3NT around 70% of the time.
1NT (14-16) 2♥
2♠ 3♦
3NT