Posted 2012-August-05, 16:55
We are in a strongly anti-field contract, which is important to recognize playing matchpoints - the majority will be in 4S, with some enterprising souls maybe reaching 6, and others maybe in 3N like you, but those being outliers. A quick look at this shows that the expectation is that 4S is making easily, with as many as 12 tricks if things behave. Let's take the scenerios 1 by 1:
Spades are 4-0. 4S will likely lose 1 spade, potentially 1-3 hearts (3 if a doubleton heart is led & W ducks from AJxxx initially, with E having 4 spades) In NT you will rarely achieve equity whether the ace of hearts is onside or off, because they have the tempo to establish an extra diamond trick or two even with a safety play to ensure your contract.
Spades are 3-1, Q is not singleton, E does not have a stiff T - you are in a similar position to spades being 4-0 in terms of equity, you will not benefit from the safety play against 4S contracts, only against 3N and 6S contracts.
Spades are 3-1, Q is singleton, or E has a stiff T - now you are in a position to win some matchpoints from the 4S bidders, you have a chance to play for the same number of tricks, though it does involve risk in the heart suit. (ie, W can duck his ace the first time, now you are in a position to have to make a decision). The safety play costs all chance to win equity against 4S contracts, and also puts you behind BTTW (Balls to the wall) 3N contracts, with 6S contracts being irrelevant to this scenario, as your matchpoint position to those does not depend on your own actions.
Spades are 2-2 (losing the scenerio where E has QT by implication of the previous scenerio) - another position to win matchpoints from the 4S bidders if you play BTTW, but where the safety play costs all chance to win equity.
My own inclination would be to forego the safety play, because I don't see that winning many matchpoints against a typical field even when its right - the 4S bidders can all afford to lay down a high spade honor 1st and still pick up 4-0 breaks, so they will always benefit from the full score of the last two scenerios.
Chris Gibson
BunnyGo writes "This was a club game with some special week going on, so there were better players than usual. My partner was off on the ogust response, but there we were in 3NT. Sadly, I got the expected low diamond lead. Do I now play spades from the top going for 6 tricks in spades (either stiff Q or Qx) or lead small to the J (picking up 5 tricks on any layout)? Would you just have bid 4S?"
Perhaps a compromise is possible: Win ♦K and lead a ♥ to ♥Q
Run ♠J unless covered. If it is covered, re-enter hand and finesse again
This loses 2 ♠ tricks when RHO has ♠ QT87 but makes at least 5 ♠ tricks against other layouts.
A possible advantage is that you make 6 ♠ tricks when RHO has a a small ♠ doubleton or a ♠ singleton (other than ♠Q). So occasionally, you do better than players in 4♠