Deal 1: East Deals, E-W Vul.

Scores:

6:10
5:5
7:3

After Easts 1 and West's 1, East might choose to ignore the spades (due to his flat shape and poor spades). West could just sign-off in 4, but if he uses Responder's bid in a new minor after opener's notrump rebid to check for major suits new minor and finds a heart fit, he might then self-splinter (if possible) in spades. Something like: 1-1-1NT-2-2-3. East's hand is now tremendous; he could use Abbreviation for A system to ask for not only the 4 aces, but the trump king as well Roman Keycard Blackwood RKC (even if West can show 2 with and a void, East should be content to stop in 6--as many pairs might stop in game). If East rebids 1, it is harder to reach this excellent slam (I'd guess it to be about 90%).

Deal 2: West Deals, E-W Vul.

Scores:

6: 10
5: 6
1: 3

If West starts with 2, it rates to go:2-2-2-2NT-3. If East raises to 4, West might pass. If East bids 4, that should be a control-bid raise (too late for diamonds)--but it isn't clear he is worth it. If he does bid 4, West will Abbreviation for A system to ask for not only the 4 aces, but the trump king as well Roman Keycard Blackwood RKC into the great slam. If West starts with 1, well ... you see the score listed.

Deal 3: West deals, N-S Vul.

Scores:

7NT: 10
7: 9
7: 8
6NT: 6
6: 5
6:4
Games: 1

Over East's 2 (assuming 2NT tops out at 21), West doesn't have enough for 3. Assuming he waits with 2, does he have a way to show minors (maybe 3) after the 2NT rebid? If so, East would/should show clubs. West maybe uses 5 next as Exclusion RKC? Not an easy one!

Deal 4: East Deals, Nobody Vul.

KQ93 Q 642 AK982

AJ2 K984 AK3 Q65

Scores:

6NT: 10
6: 9
6: 8
5NT: 5
4: 4
5: 3

After East's 1NT, it is a matter of methods. How does West show 5 clubs and 4 spades? If he does, East has a beautiful hand fora club slam and likely he will take over at some point with a keycard ask. Knowing everything is present except for 1 keycard, perhaps he can take a stab at 6NT.