support-3.adoc

Support Doubles

Unless overruled elsewhere, after opener bids a suit and responder bids another suit:

• if RHO overcalls, a double shows 3-card support for responder

• if RHO doubles, a redouble shows 3-card support for responder

Eschewing the support double shows 4-card support.

Support Doubles are on through {support-double-max}. At a higher level, doubles in competition are card-showing.

Exceptions

• 1X-(1Y)-1Z-(1NT);X: penalty

• 1♣-(p)-1♦-(X);XX: support, but bidding a major takes priority

• 1♣-(p)-1♦-(1M);X: negative