An opening Flannery 2 bid shows 11-15 HCP with exactly 4♠ and 5♥. 

The purpose of Flannery is to avoid rebid problems with this hand type.

2♦ - ?

• Pass - 6+♦, signoff;

• 2♥ - natural, signoff

• 2♠ - natural, signoff

• 2NT - strong, artificial and forcing, asking opener to further describe his hand:

  • • 3♣ - 4513

    • 3♦ - 4531

    • 3♥ - 4522, 11-13 HCP

    • 3♠ - 4522, 14-15 HCP

    • 3NT - 4522, 14-15 HCP, Qx or better in the both minors

    • 4♣ - 4504

    • 4♦ - 4540

• 3♣ - 6+♣, signoff

• 3♦ - 6+♦, invitational

• 3♥ - 3+♥, 10-12 points, invitational

• 3♠ - 3+♠, 10-12 points, invitational

• 3NT - natural, signoff

• 4♣ - 3+♥, strong, forcing

• 4♦ - 3+♠, strong, forcing

• 4♥ - 4+♥, signoff

• 4♠ - 4+♠, signoff