Winstonm, on Apr 28 2007, 10:28 PM, said:
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Generally not a good idea to use pass here for all weak hands but only for weaker hands with no convenvient bid. The Walsh structure is designed for non-competitive auctions and is no longer followed when the opponents bid. The 1S bid over 1H should not express any extra values, shape, or additional length. If you pass with AQxx, xxx, xx, AKxx the auction may procede p-1C-p-1D-1H-p-4H-X-p-?
Are you going to bid 4S when partner may hold KJ, x, AQxxxx, Jxxx? Will you pass for penalty when he might hold: Kxxx, x, AKJxx, xxx?
If opener had bid 1S over 1H, you can pass the double easily with the first and will play 4S opposite the second.
P.S. Using support double for diamonds is an extremely poor choice, IMO. A better choice is to show a 4-card heart suit in case the auction is p-1c-p-1D-1S-X as now if you pass even a simple preemptive jump to 3S can shut out hearts. If you use this method double here: p-1C-P-1D-1H-X can show 4 spades and bidding 1 spade can show 56.
Jdonn's thread, I will let him explain his agreements, that is most important.
For me partner cannot have your second example and respond with one diamond.