Tuesday, July 12, 2005 4:34 AM

D.S.I.P. Invitational Hands




          D.S.I.P. doubles are defined for all competitive auctions where forcing pass theory does not apply. This means all invitational ( limit raise hands) fall under D.S.I.P. jurisdiction until game is reached by our side than forcing pass theory takes over. BJ and I had three D.S.I.P. auctions where invitational hands were front and center. I opened 1 in 3rd seat and the vul opponent bid 2NT . BJ bid 3♣ which I alerted as a limit raise in spades. The opponents crawled in 3and I passed. LHO made a game try and they settled in 4 and around to me. I held 3 defensive tricks which books them in my own hand and I did not think 4 would go down more than one so I made a D.S.I.P. double. BJ had a trick also so he passed and we got +200 against our –50 in 4.


           Another D.S.I.P. inference surfaced with an invitational auction. The opponents opened 1♣ and vul against not , I doubled with a 4-4-4-1 10 HCP . LHO passed and BJ bid 2 invitational. RHO bid 3♣ so I had a decision to make. We are in a competitive auction so D.S.I.P. theory should apply when partner invites. I can bid 3 with my nothing as I am just competing in the absence of a D.S.I.P. double. The 2nd double by a T/O doubler is always D.S.I.P.  We can make +140 in spades and they make +110 in clubs which is a substantial IMP difference. If I pass , BJ will also pass as he was all in with his 2♠ bid and did not have the controls for a D.S.I.P. double himself ( he would need two controls for a double at the 3 level after my double ) .


          Another auction BJ made a D.S.I.P. double but I did not recognize it as such. Both sides vul I made a belated takeout double with 10 HCP’s and two defensive tricks. They leapt to a vul game in 4 which was their suit I doubled at the two level. BJ doubled 4 with two defensive tricks and we were +200 .  BJ contends that the auction is still at the 4 level so D.S.I.P. doubles should apply. BJ had a huge heart fit with me and was willing to sacrifice in 5 if I could not stand 4X. The opponents are bidding this to make so a trump stack double is probably silly ( helps them play the hand ) and a belated double is unknown as far as defensive tricks are concerned ( could be quite shapely). I think I must agree with BJ that the double was a 3rd case D.S.I.P. double as they owned the auction so we are deemed as the pests.  Comments ?