Sometimes the opponents don’t bid like you, indeed, sometimes they bid badly but you have got to survive their bidding and card play! West opened a Precision 2C showing 11- 15 hcp and 5+ clubs with the added proviso that if there isn’t a four card major, there will be a sixth club. North either didn’t have a two suited bid ( 3C for the majors springs to mind) or just wanted to take up as much space as possible and get partner off to the best lead with the 3H bid. With little space left, East tried a take out double and West, with no options, bid 3NT. To his surprise, North opened with the spade four. This is clearly from length and, together with the 3H bid, leaves North with very few cards in the minors. West beats the 6S with the ace and looks to the minors. There appears to be plenty of tricks but there is a problem due to lack of entries to the West hand. There may also be a problem when South clears the spades after a losing minor suit finesse. How would you proceed?
The simplest approach is to lead a small club to the QC at trick two, followed by finessing the club jack. While the KC is very likely to be onside, this line does depend on the clubs being 3- 2 and needs to fall back on the diamond finesse when they are not. A better line is to play a small diamond to the ten and queen. South will return a major suit and you can try running the QC after winning the KS. The queen will be covered by the king, to try to block the suit, but you can win the ace, cross back to the 10C and then back to hand with the JD to enjoy the clubs and then the diamonds as well. This is much better than the previous line.
Now imagine you are defending. Can you beat the second declarer line? The second line provides a re- entry to the West hand as well as, less obviously, a late entry to dummy. South should duck when the 10D is finessed and take the QD when declarer leads small to the jack. Now, declarer can never unravel the nine tricks!