gnasher, on 2010-October-25, 11:40, said:
Why should we assume the worst? The expected average heart lengths around the table are roughly 2-3-3, but you seem to be assuming it will nearly always be 1-3-4, 1-4-3, 2-2-4 or 2-4-2. If LHO has two hearts, then 2-3-3 is more likely than 2-2-4.
Nor is there any certainty that RHO will double when he has four hearts. He doesn't have very good spots, and a holding like KJ8x sitting under the length won't look much more useful than it did against 2NT.
When partner has If partner has 2 or 3 hearts, my hand will be worthless in notrumps, but playing in hearts it will usually be worth two tricks. The trump suit will also provide entries to dummy. The weak two-bidder appears to be maximum, so those entries may be quite useful.
I ran some simulations, altho time constraints make my sample small. I gave west 5-10 hcp and 5-6 spades and 4-6 in a minor, and N at least one spade stopper and 16-18 hcp (I think many players would overcall on good 15s but I don't think this invalidates the concept)
I excluded hands on which I felt it fairly likely that East would double 2N, but left in some hands on which East could expect to defeat 2N but would be worried about a runout (in one case, he held AKQJxx in clubs but short hearts.
There was of course a large element of subjectivity in deciding how clear double was as East...and I tried to be conservative.....there were a number of hands on which 3
♥ did badly but on which I felt that double would be aggressive and therefore assumed no double.
based on that, transfering generating 20 disasters, while reaching undoubled contracts that played as well or better in hearts than notrump 7 times, and played worse than notrump, but was undoubled, 5 times. So on an admittedly limited sample, transferring was a very unwise decision.
I assumed that West would never reopen...I think that is valid.
edit: at imps I am a very conservative doubler of part-scores into game and thus when deliberately, as here,, being conservative, I strongly believe that my simulation, if anything understates the frequency of disaster. I should also add that on at least two of the disasters, we hit partner with 18 real and 4 hearts, and I assumed a super-accept...and thus a double when I doubt that East would have doubled 3H (if he is as conservative as I am in doubling partscores into game)
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