Muiderberg 2M
Muiderberg shows exactly 5 cards in the bid major and a side minor suit. Multi 2♦ already takes care of 6+ cards. I recommend response structure combining Meckstroth and transfer advances.
| 2M - | |
|---|---|
| 2♠! | NAT NF |
| 2NT! | INV+, ask for the minor suit |
| 3♣! | P/C |
| 2♥ - | |
|---|---|
| 3♦! | INV+, 3+♥ |
| 2♠ - | |
|---|---|
| 3♦! | TRF: (FG, 5+♥) or (INV, 6+♥) |
| 3♥! | INV+, 3+♠ |
| 2M - 2NT - | |
|---|---|
| 3♣ | MIN, 4+♣ |
| 3♦ | MIN, 4+♦ |
| 3♥! | MAX, 4=♣ |
| 3♠! | MAX, 4=♦ |
| 3NT! | MAX, 5+♦ |
| 4♣ | MAX, 5+♣ |