2. No. If you draw trump and then run diamonds (throwing your hearts), you will be at the mercy of the A being in front of the king (a 50-50 chance). Better is to cross to your hand at trick 2 (let's say with a to the ace) and trump a heart high. Then play the other high spade and draw trump ending in hand. You will throw one heart and one club on the long diamonds, to take 12 tricks. Only a 5-0 split in spades or diamonds would ruin this plan. The full deal:

	KQ3  A  KQ1075  J763
4  QJ1072  9842  A108		9852  K983  6  Q954
	AJ1076  654  AJ3  K2

1 Yes. You can draw trump and then run diamonds. On the diamonds you throw both losing hearts from your hand. You knock out the A and have 12 easy tricks. There is no need to first try to trump hearts in dummy.

The full deal:

	KQ3  A  KQ1075  Q873
9854  KQ1072 -- J1052		2  J983  98642  A96
	AJ1076  654  AJ3  K4

2 No. If you draw trump, what will you do with all of your red-suit losers? In fact, drawing trump will likely lead to down 3! Be happy you didn't receive a trump lead. This is a cross-ruff hand. Play a club at trick two and trump a heart with dummy's 3 (saving the high ones for later). Trump a club with the 6 and trump another heart. Trump a spade with the 7 (you have to take a chance that LHO didn't start with a doubleton). If you panic and trump high, you will end up with the 7 as a loser at the end. Once the second ruff (low) in hand lives, you are home free. Trump your last heart in dummy and your AJ10 are high. You lose only 3 diamond tricks. Don't ask how we got so high!

The full deal:

	KQ3  A  J875  Q7642
952  QJ109  K102  J93		84  K853  AQ9  K1085
	AJ1076  7642  643  A

2 No. Sure, you can draw trump and take 12 easy tricks--2 overtricks. But, why not take 13 (3 overtricks) for a better matchpoint score? At trick 2, play the 3 to the 8 (a club would be risky as they might be 3-0). Trump a heart in dummy. Overtake dummy's last trump to draw trump (even a 5-0 break won't hurt). Then run the clubs to throw both diamond losers, making 7 for a good board. The full deal:

	KQ3  A  762  Q109653
764  KQJ102  K985  8		52  98764  AQ104  J7
	AJ1098  53  J3  AK42

3. Trumping a heart in dummy is a reasonable thought, but you'd still need to do something with all the diamonds. Better is to try to use dummy's clubs. At trick 2, play the A and trump a club. If they are 5-1, abandon that suit and trump your heart in dummy. But, if everyone follows to the second club, cross to dummy in spades and trump another club. If they are 3-3, you have 3 good clubs in dummy for discards. If trump are 2-2, you can even ruff your heart in dummy and make 12 tricks. If clubs are 4-2, cross again in trump and ruff the clubs good. Even if trump are 3-1, you still have 2 good clubs in dummy to throw losers.

The full deal:

	KQ10  A  876  A76543
542  J1087  AQJ9  KJ		3  KQ9432 52  Q1092
	AJ9876  65  K1043  8

Here is how the play would go (declarer takes the first 10 tricks):
T1)
T2-3) A-club ruff
T4) to dummy
T5) ruff
T6) to dummy
T7) ruff with A
T8) Declarer's last spade to dummy's last spade
T9-10) Good clubs