Posted 2013-July-08, 08:23
opening off-shaped 2NT is something to be avoided if possible. it makes it very difficult to bid slams. this south hand has massive slam potential opposite quite mediocre hands which wouldn't investigate over 2NT.
with a singleton spade the prospects of a 1H opener being passed out are very slim.
anyway after intervention over 2NT, it's normal to play take-out doubles. Yes, north should make one. It means he loses the 5th heart but you have to some sacrifices when you have no space.
over 4S, south should pass. this should be forcing and showing a hand interested in bidding more. forcing because there's no way you would want to defend 4S undoubled after opening 2NT and hearing partner show values (i.e. by doubling 3S). then north with a singleton spade and 1.5 hearts more than he's promised will be tempted to bid on as he'll know south has no soft cards in spades. forcing passes are a very tricky area of bidding. expert players often find it difficult to agree when they apply, so it's not exactly a b/n issue. of course with such a crappy hand in hcp terms, north might decide not to bid on anyway, as 11 tricks are unlikely to be cold.