Part 1:
Win ♥A and advance ♣Q. Let's assume that West covers. You win the ace in dummy and lead a spade. East ducks (option 1) and from there you enter dummy twice in diamonds to ruff two hearts high. You cash ♣J and exit with a trump to East's ace.
There are four cards left. After East, perforce, cashes a heart (as you pitch a club), you have a low trump and two diamonds, West has a high trump and the high card in each minor, and dummy has a low trump and one of each minor. On the next heart West is squeezed.
If he ruffs high you throw a diamond from dummy and claim. If he throws a diamond you ruff in dummy and ruff a club. If he throws a club you ruff in dummy and cash dummy's club, which is now high, pitching your last diamond.
If West refuses to cover at trick 2, you continue with a club to dummy's ace and proceed as before. The same neat ending will materialise.
Now, let's assume that East rises with ♠A. Then it gets very complicated. West covers the club at trick 2 (option 1). On a trump lead East wins. Suppose he plays a second trump. (I will examine the other possibilities later). You lead a diamond.
1. If West splits, win, pull the last trump and cash the second club, then lead another diamond. West must duck, else your diamond spots win a trick on power. Duck in dummy to endplay East, who is now heart-tight. Pitch on his first high heart; then he must set up dummy's 10 on his next heart lead while you still have a high diamond as an entry to the good heart.
2. If West plays low, duck to East. Now you will be able to ruff your fourth diamond in dummy no matter how East defends. If he plays a high heart, pitch a club. (In most variations I will pitch the first time East plays a heart).
If East continues with a low heart, ruff high, unblock diamonds, ruff a club with your remaining low trump, ruff your fourth diamond, and you have a high trump at trick 13. If West ever discards a diamond, just draw his last trump and cash a diamond.
After East wins the diamond, if he plays anything but a heart, win, unblock diamonds, ruff a heart high, cash your club (if you haven't done so yet), ruff the fourth diamond and exit with the third club. West must win and put you back in hand to claim with good trumps.
Variation:
Suppose East wins the trump ace and plays a high heart immediately. Pitch a club. Now if East plays anything but another heart, transpose to (1) or (2) above. If East continues with a high heart, ruff high and draw trumps; the ♥10 is your 10th trick. If East continues with a low heart, pitch a diamond as West ruffs; later you can squeeze West in the minors for your 10th trick.
...
The last problem arises when West ducks the first club. I'll come back to that when I have recovered my breath. It's 1:10 am here
Roland

Help

s
t
r-m
nd
ing) tr. v. - Any bid made by bridge player with which partner disagrees.
S: 4S
(E opened 2H)
Lead: HK