2C : 10+ HCP 6 + card diamonds

: 10+ HCP 5+ cards in a major and 4+ cards in a minor

2D : 10+ HCP 6+ suit hearts

2H : 8+ HCP and 5 - 5 ( better in the majors )

: 10+ HCP and 5 - 4 or better in the majors

2S : 10+ HCP 6+ spades

2NT : 12+ HCP, 6+ card clubs, and a side singleton or void

3C : 10+ HCP, 5+ card clubs, and 4+ card diamonds