INTERNATIONAL MATCHPOINT (imp) STRATEGY
PART 3: DOUBLING IN IMPs
1. Doubling Part Scores. The gain will be about 2 or 3 IMPs. The lose is about 9 or 10 IMPs . Doubling part score contracts is bad bridge at imp scoring or playing rubber bridge. Just do not do it.
2. Doubling Game Contracts. Doubling game contracts is good stratagy in IMP bridge. The lose is usually about 5 IMPs and the gain can be considerable. Be carefull to not double a game exclusivly on a trump stack - you may help declarer make his contract.
3. Doubling or going on if the they try to sacrifice. Take your plus. "The five level belongs to the opponents" in IMP scoring. If you bid again maybe you should go to six.
4 Doubling Slam Contracts. Doubling of 3NT or slam contracts should be for a lead.
5. Doubling for a One Trick Set. The gain on a one trick set is very little (2 or 3 IMPs). If they make it with an overtrick the lose will be 7 or 9 IMPs. It is just not worth it.
IMPS Vrs Match Points