[0wcli]

I have play Help Suit Game Try with my regular partners. However, We have some problems in the agreement on whether we should start the counter help. We have 2 different agreements as follows:

(1) When we have no help on partner's help suit (say 1♥-2♥-2♠) but maximum hand (say ♠xxx ♥Kxx ♦AQxx ♣xxx) , we would use counter help (say 3♣ in this example); or
(2) When we have help on partner's help suit but not good enough to bid game (same sequence and you hold ♠KTx ♥Jxx ♦Kx ♣T98xx).

Any opinion on which one is surperior and why?

[Zelandakh]

Option 3
(3) I am not sure whether to bid game and have losers in this suit.

No need to make it more complicated than this

[dake50]

As Zelandakh, partner may have chosen this help suit just so you will have a counter help-bid.
Whether to show losers here (my preference) or quacks/help here is your decision.

[SteveMoe]

Generally respond to help based on loser count in the target suit. With 1 we go, with 3 we sign off.
With 2 we can choose to counter help showing concentrated values 2T3 usually...to invite partner to help make a close decision. Of course, the counter has to be lower than 3M, otherwise we've forced game and told the opponents too much...