Muiderberg 2♠
Muiderberg shows exactly 5 cards in the bid major and a side minor suit. Multi 2♦ already takes care of 6+ cards.
| 2♠- | PRE, 5=♠, 4+♦♣ |
|---|---|
| 2NT! | INV+, ask for the minor suit |
| 3♣! | P/C |
| 3♦! | INV+, 3+ SUPP |
| 2♠-2NT | (R) INV+ |
|---|---|
| 3♣ | MIN, 4+♣ |
| 3♦ | MIN, 4+♦ |
| 3♥! | MAX, 4=♣ |
| 3♠! | MAX, 4=♦ |
| 3NT! | MAX, 5+♦ |
| 4♣ | MAX, 5+♣ |