When you and partner freely exchange bids without opposition interference, you can be said to have a CONSTRUCTIVE auction. However when one side starts overcalling you are now into the crazy world of the DESTRUCTIVE auction. They overcall to destroy your auction, to suggest leads or to steal away what may rightfully be yours. This is when you need to access your inner Dalek and EXTERMINATE! Fits in suits often count for more than mere HCP so be on the look out for these situations.
At the recent pan- galactic tournament on Arcturus V the hotly contested final was between Humanoids and Daleks. This hand arose with the match all square. N & S (vul) were the Humanoids, S dealt:
The tough auction went:
1H - 1S - 2S! - 5S
2S by North was a good raise (10+) and a 4+ fit. Despite his zero count the Dalek East imagined his species cry of "EXTERMINATE" and went through the roof with his bid of 5S but this induced the catastrophic error by S of 6H which went 2 off after the efficient defence of AC, club ruff and a Diamond return. -200. At the other table with the Daleks sitting N- S the auction was a gentler affair but with a sting in the tail:
1H - 1S - 2S! - 4S
5H - X - Passed out
Bemused by his partner's pass of the double, West now made a series of Humanoid defensive errors and led the AS, ruffed by the Dalek South, who drew trumps and led a club. Winning his A the Humanoid West compounded his errors by leading a low Diamond, won by the Q on the table so the Dalek South could claim his doubled vulnerable contract PLUS ONE and score +1050 which the Daleks gleefully added to the 200 won at the other table for a total of +1250. The humanoids caved in and duly lost the rest of the match by a heavy margin. After the match the Daleks discussed the hand:
"Why you make lunatic bid of 5S? Could be disastrous. Right this time, lucky......"
"Had to do desperate thing. Never know. If they bid 6H's and make, I will congratulate warmly then terminate me in nearest Nova. But I don't think so..."
5S is a "pressure bid." Pressure induces mistakes. A destructive auction can go either way. Make sure it's your way...