GNT: Two Grand Slam decisions

So, my team won the District 13 Flight A GNT, and I'll be heading to the summer nationals for the second year in a row. Here are two interesting hands which involved grand slam decisions.



For our first hand, partner opens 2C, and we're looking at a monster. We're vulnerable versus non-vul opponents. RHO overcalls 3H.

AKQJ5

96

43

A1065



The auction proceeds:

2C - (3H) - 3S - (p)

4D - (p) - 5C - (p)

6C - (p) - ???



I posted this as a bidding problem on bridgewinners.com, and the discussion is interesting.





For our second hand, you hold only ten points, but five-card support for partner.

AK1085

void

K10542

976



The opponents are silent, and the auction proceeds.

1D - 1S

2H - 3D (forcing)

3H - 3S

4C - ???

What is your plan? Do you push for six? Try for seven? What line of play do you envision?

GNT: Two Grand Slam decisions