Plan your play... note if the play of the ♣9 or ♣2 has any influence on the line you choose. Does the experience/play level of EAST make a difference in your choice?
bbo hand, with bbo bidding...EW passing
1♥ 4NT
5♥ 6♥
Pass
Opening Lead ♥6 to 4 8 T
Trick TWO, ♥A-♥2-♥5- and either ♣9 or ♣2
Three rounds of ♠ West playing 3,4,J, East 6,7,T (thrid round ruffed)
♦7-8-Q-2
1♥ 4NT
5♥ 6♥
Pass
Opening Lead ♥6 to 4 8 T
Trick TWO, ♥A-♥2-♥5- and either ♣9 or ♣2
Three rounds of ♠ West playing 3,4,J, East 6,7,T (thrid round ruffed)
♦7-8-Q-2
(modified due to good comment from pretzalz)
This post has been edited by inquiry: 2009-January-18, 23:48

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1♥ 4NT
5♥ 6♥
Pass
Opening Lead ♥6 to 4 8 T
Trick TWO, ♥A-♥2-♥5- and either ♣9 or ♣2
Three rounds of ♠ West playing 3,4,J, East 6,7,T (thrid round ruffed)
♦7-8-Q-2