You are playing in a Club Swiss when this hand comes up:

All of the players are active members of the Bridgewinners community, so you are going to have to be at your best to make this contract.

West leads the ♠4 to her partner’s Ace and the play proceeds as follows:

West now leads the ♦2, small, 6, ten, at which point you realize that you are taking -50 to your teammates.

Where did you go wrong?

Of course. You were careless.  You should have played the ♦7 on West’s deuce. Then you could have cashed the A and taken the proven finesse.

Bridge is an easy game…or is it?

Unfortunately (for you), your Bridgewinner’s opponent in the West seat won’t lead the ♦2, but will lead the ♦9 instead. Look what happens:

Your Bridgewinner’s teammates aren’t going to like this -50 any better than the other one.

Is there nothing to be done?

Luckily, these plays all took place in the time while you were thinking at trick one. You finally realized that there was no problem if Diamonds were 3-2 with the Queen onside. Instead, you need to plan for Diamonds to be 4-1. Now what? If West is 4441 as you suspect, then you have a chance for a Heart/Diamond squeeze. Just isolate the menace in Hearts and run the clubs.  Will that fancy ♦9 play work this time?

No, it won't work.  There is a beer in your future after all.