[HardVector]

pes_6, on 2019-May-16, 15:01, said:

I really can't bid game (3nt) without any heart from my side after double. Isn't my mistake, it's hard shape.

Partner's double is a mistake, unless you are playing penalty doubles. Even then, partner doesn't have enough to double 2h opposite a normal opener. So, if partner's double was takeout, then they are promising at least a good 10 count to go to the 3 level, so you DO have enough to bid game. You don't know which game, so I'd bid 3h with your hand, not 3c.

[Vampyr]

HardVector, on 2019-May-17, 17:41, said:

Partner's double is a mistake, unless you are playing penalty doubles. Even then, partner doesn't have enough to double 2h opposite a normal opener. So, if partner's double was takeout, then they are promising at least a good 10 count to go to the 3 level, so you DO have enough to bid game. You don't know which game, so I'd bid 3h with your hand, not 3c.

I have been persuaded by mikeh’s argument above that 4♥is a better bid than 3♥, and shows the hand pretty much exactly.