Slam play problem from the Transnational in Chennai in 2015

West

♠

42

♥

KQJ1092

♦

A52

♣

AQ

East

♠

K

♥

A83

♦

KJ763

♣

K1093

W

N

E

S

2♠

X

4♠

6♥

P

P

P

2♠ showed 3-10 HCP. North leads the ♦10. Plan the play. If you lead a round of trump everyone follows.