Type "Interference over 1 no trump lebensohl convention" into google. This also allows double to be retained for penalties.

Many thanks.

David

The simle way on this hand is to play takeout doubles even after our side opens 1NT.  That is a very common treatment amoung top pairs.  The auction would go...

1. North doubles for takeout (they are balanced enough to be happy if south elects to pass the double because they hold a resonable 4+ card heart suit.  If they are more distributional, say 4162 or the like, so not happy to hear their double passed by partner if their partner has hearts, they could use Leb to show 4S and no stopper).
2. South bids 2S (you might jump to 3S with a good max but this is not that with so many point concentreated in the doubleton heart).
3. North raises to 4S (you might try to do something more considerate in case south has bid 2S with only 3, but 4S is fair).

The flipside to takeout doubles is that to penalise you'd have to pass and hope that the opener will make a takeout double that you can then pass... not as risky as it sounds, as partner will be there for you whenever they can be.

There is also Rubensohl  ( sometimes spelled Rubinsohl).