Everyone Vulnerable, LHO starts the bidding and it goes:
2♣ shows <15HCP and at least 4-4♠-♣, both 'decent' suits.
You hold ♠KQ98x ♥T ♦xxxx ♣xxx. What do you bid?
With my ♠ holding, I know partner either has the Ace or a 5+ card suit without the Ace. I also know opponent's have a ♥ fit, and partner will be short in ♦, so I bid 3♠. LHO ends the auction with 4♥.
Here's the full deal:
Normally, nobody would lead ♠, but my partner did because of the bidding. It was the only lead which defeated the contract. Partner lead ♠A (I played the Q, showing the K and an odd nr of ♠s) and continued with ♠J which declarer ruffed. Either way she plays, she had no way to 10 tricks because she got too short on trumps and lost control. Every time we had the lead we continued ♠.
Note: 3♠ will go down 1 only after a ♠ lead and a ♦ shift.