2♣ ---
2♦* : Artificial negative (<8 HCP) or relay with stronger hand.
2♥ : Kokish relay, forcing to 2♠, either 24+ HCP, bal, or ♥ 5+
: after responder bid 2♠ ...
2NT : 24+ HCP, GF (includes ♥ 5,bal)
3♣ : ♥ 5+, ♣ 4+
3♦ : ♥ 5+, ♦ 4+
3♥ : ♥ 6+
3♠ : ♥ 5+, ♠ 4+
2♠/3♣/♦ : 22-23 HCP, 5+ suit
2NT : 22-23 HCP, balanced or semi-balanced
similiar development as 2NT opening
3♥/♠/4♣/♦ : 5+ suit, 24+ HCP or 9+ tricks
2♥/♠/3♣/♦ : Natural, 8-9 HCP, 5+ suit with 2 honors, or 10+ HCP.
2NT : 8+ HCP, balanced or semi-balanced.
}
After Interference
2♣ - (X) - ?
Pass : Weak or misfit.
RDbl* : 7+ HCP, positive.
New Suit : 6+ HCP, natural.
{
2♣ - (overcall) - ?
Dbl : takeout, 0+ HCP
New Suit : 6+ HCP, natural.
}