WesleyC, on 2015-November-06, 00:31, said:
Knockout IMPs!
West leads the
♠2. East wins with the
♠A and returns the
♠7 as West follows with the
♠6.
Plan the play!
Unblock a spade honor from hand on the
♠A.
Win second spade in hand and play
♦6.
If West goes in you are obviously in great shape with 3 entries to dummy.
For example if West continues spades, win in dummy and run a diamond honor. If East does not cover, discard.
Whenever diamonds are no worse than 4-2 you are home. with 3 diamond tricks.
So let's assume West plays low to the first diamond.
Now comes the critical play, duck in dummy!
If diamonds are 4-2 either way your best chance is that someone holds
♦Kx or
♦Ax.
Your intention is to ruff a second low diamond from dummy and if an honor drops give up a third diamond to the remaining honor.
If no honor drops hope diamonds are 3-3.
If West has ducked with
♦AKxx the first diamond from hand look for different opponents. These ones are too tough.
How good is this line?
After the trump lead and continuation chances that there is a singleton or void in diamonds must be negligible.
Assuming West would not duck with
♦AKxx the line is somewhere between 85 and 90% and this assumes West would lead a trump holding a small doubleton in diamonds.
Rainer Herrmann