Polish two-suiters (Muiderberg Two Bids) - preemtive 11- HCP (Jassem version):

• • 2♥ - 5+♥ and 5+♠ or 5+m:

    • • 2♠ - weak 2+♠ or signoff 6+♠;

      • 2 NT - ask for second suit, 3+♣ i 3+♦ or strong;

      • 3♣ - weak to the partner's longer;

      • 3♦ - inviting;

      • 3/4♥ - blocking,

  • 2♠ -5+♠ and 5+m:

    • • 2 NT - ask for second suit, 3+♣ i 3+♦ or strong;

      • 3♣ - weak to the partner's longer;

      • 3♦ - inviting;

      • 3/4♠ - blocking.

After the intervention, the bidding is natural.