I was the original poster's partner on this hand. This was a new partnership. We had not discussed much of anything beforehand, simply agreeing standard bidding (which I took to mean SAYC), standard carding, and 1430. The sequence 2NT-3S is not defined in SAYC. I personally prefer it to mean the minor-suit slam try that partner intended it to mean, but wasn't sure I could safely assume that. Knowing that the convention was in play, I probably would have responded 4D to indicate a minimum (2NT was 20-21) with a diamond fit. Then partner can possibly cuebid 4S with his singleton (I'll be able to infer the shortness from my hand), and I can either bid 4NT to check for whether the ace is there, or just bid 6D myself. Since I wasn't sure we were using MSS, 3NT was intended to show a balanced minimum and invite partner to make the next move. As it happened, it was passed (not necessarily a bad move). I received a spade lead (won in hand), cashed the Kd, ran the Jd to the queen and ace, cashed three more diamonds (discarding a heart as North pitched two clubs while South threw spades). Then I crossed to the Ac and, when North showed out, finessed South for the Qc - making seven. (I was intending to play for the drop in diamonds anyway, but figured I'd give myself an extra chance if West covered. Once North tossed two clubs, I figured on a drop again, but changed my mind when he showed out.) +720 was good for 76.79% of the matchpoints; only three out of 29 pairs bid and made slam. In the absence of agreements to cover West's hand type, I don't see how to get to slam. Since SAYC doesn't include MSS, how can it be bid? Mike