Aces High

------This hand was played in one of the team matches and requires a good agreement for partners to be successful at this board.
You hold these cards in the 3rd seat.
♠Q
♥Q
♦AKQT9876
♣J32

While thinking what to open your partner opens 1♣ and your right bids 2♠. You bid 3♦ and your partner 3NT.

W---N---E---S--------Vul----:None
-----------1♣--2♠------Dealer-:E
3♦---P--3NT--P
----Now what you will bid over 3NT? If your partner has aces slam is cold, even Grand slam. So, we need a cooperation about our partners hand. Actually he has already given a wonderful description about his hand while bidding 3NT.
3NT means ♠ stopper and a hand lack of aces. So, 3NT is a discouraging bid.
What if he had this hand?

♠Axxx
♥Axxx
♦xx
♣RDx
Here is the solution; you have 3♥, 3♠ and 3NT bids. You should use 3♥ bid with these kind of hands which are more suitable for playing trump and 3♠ asking a spade stopper .
As you see 3NT is unbeatable.

♠Q-----------------------♠KTx
♥Q-----------------------♥KJ87
♦AKQT9876----------♦xx
♣J32--------------------♣KQxx

Now take a look at the opponents hand.
what would you bid with this hand ?
♠542
♥A6542
♦2
♣A54

W---N---E---S
-----------1♣--2♠
3♦---?

At the table North did not involved in the bidding, however, this may lead a bad result sometimes but you should bid 4♠ anyway. Now opponents are in big trouble. East will double with his values and this should be the end of the bidding.

W---N---E---S
-----------1♣--2♠
3♦---4♠--dbl All pass

If East has a "acey" hand he should pass and over his partners dbl he should bid 3NT or anything else except for pass.
It is very hard for E-W to reach correct contract after opponents 4♠ bid but dbling 4♠ is the best thing cause E-W can hardly make 3NT and 4♦.