How to play this hand (GIB say slam)

[kontoleon]

Ok this hand is on single Rodot game, and always in robot game you are S i am 2nd chair

 

[hv=pc=n&s=shat85dak97cak754&w=skj54hj976dqjcqj8&n=st9863hdt8652ct93&e=saq72hkq432d43c62]399|300|East open 1H[/hv]

 

Ok here is out of Question that The best is D but here i found the C.

 

I just miss some trics, but the possision is slam even we play C here. And the slam is if Why PLAY D here and no C! But why?I try to have the opponent no C but i fail.

 

What i miss?

 

EDIT: i dont need the beat system i need to understand why is slam here in BOTH C and D...(Really sorry from ny english)

[nige1]

[hv=pc=n&s=shat85dak97cak754&w=skj54hj976dqjcqj8&n=st9863hdt8652ct93&e=saq72hkq432d43c62]399|300|

East open 1H Ok this hand is on single Rodot game, and always in robot game you are S i am 2nd chairOk here is out of Question that The best is D but here i found the C.I just miss some trics, but the possision is slam even we play C here. And the slam is if Why PLAY D here and no C! But why?I try to have the opponent no C but i fail.What i miss? EDIT: i dont need the beat system i need to understand why is slam here in BOTH C and D...(Really sorry from my english)[/hv]

In 6♣ a possible line is win ♣Q lead with ♣K, ruff a ♥, ♦K, ruff a ♥, ♦A, ♣A, lose ♣7 to LHO's ♣J. Win LHO's return -- with ♥A (say), cash ♣9, ♦9T8, You make 1 x ♥, 2 x ♥ ruffs in dummy, 4 x more trumps, and 5 x ♦s. A good declarer would probably find a winning line at the table.

 

You can learn and check out play, using GIB. For example GIB shows how you make 7♦.