Snapdragon Double - folksbridge21/system2 GitHub Wiki

(1x)-1Y-(z)-X (Snapdragon)

Competing values (7+ HCP, a decent 5-card suit, tolerance of partner‘s suit) o Lead direction Possible double fit with partner Overcall does not deny an opening hand so it might well be the overcalling side to declare.The Snapdragon double essentially says "partner, I have the decent 5+ card 4th suit and some values (about negative double strength). If you don’t fit the suit I am showing, you can rebid your suit cheaply (I have enough tolerance) and we will at least be in a playable contract." Notes:

It is more useful to use the double to promise Hx (honor-doubleton) in partner's suit and a desire to compete. This information may be just what he need on defense as well as to decide what to rebid. Some players would also make a Snapdragon double with 3 baby cards in partner's suit if balanced, and/or a weakfish 6-card suit. Some players use Snapdragon aggressively as a powerful tool to diagnose fits after an over call. Some basic concepts: Support is 3+ cards Tolerance: usually 2 cards or 3 baby cards No-support: 0-1 cards. Note: If you have a better (support) or worse (no-support) fit, you cannot use snapdragon. This is one of the primary benefits of playing snapdragon - the negative inference:

When partner just bids the 4th suit, he is saying that he either has a very good fit (he would bid on later) or no fit.