Playhand 36

Board 36
South Deals
Both Vul
7 3
Q J 10 8
Q 6 4
A 5 3 2
Q 10 2
9 4 3 2
9
K Q J 10 7
N
W E
S
J 9 8 6 5
J 10 8 7 2
9 8 4
 
A K 4
A K 7 6 5
A K 5 3
6

South dealt and open 1, a much better choice than 2NT, with the 21 pts. North replied 3, and South then asked for aces by bidding 4NT. Finding one ace, South then bid 7, hoping there were not wasted values in the North hand in the suit

The K was led can you make all 13 tricks ?

The trap is to ruff 4 in dummy. Instead win the opening lead and ruff  s in declarers hand, three times, on the 2nd and 3rd ruffs ,then ruff with K and A of s, getting to dummy with a Q and then8. Having done that the remaining trumps can be drawn and the contract made