[jillybean]

For clarification,
Multi players playing the weak only version, with 2M being 5 cards 8-10, do you play it only promising the major?
Best practice?

I ask because if we are waiting for a 5M5m hand to use Muiderberg, we could be waiting a while and miss opening those 5M 8-10 hands

[DavidKok]

I don't fully understand your question, sorry.

Over here it is common to play a multi 2♦ with Muiderberg 2M openings. The multi contains weak hands with 6(+) cards in an unknown major. The Muiderberg openings show exactly 5 in that major with 4(+) in an unknown minor. I think waiting for a 5-5 is foolish.

[mw64ahw]

I have a Rainbow version of the Multi-2♦ which only promises 5 as it can be balanced 8~10. Occasionally you find partner trying to find a minor and end up with a 7-card fit.

[Cyberyeti]

The following are common here:

Weak only multi, 5+ cards, bad 6 card suit plus any of

Classical weak 2s, 5-9, 6 card suit
Lucas 2s 5+/4+ similar if not identical to Muiderberg

Also possible is to play intermediate 2M with all weak 2s in the multi

I play all weak 2s in the multi (except a classical 2♠ in one partnership)

2♥ Ekren
2♠ Classical weak 2 in one partnership, weak 5-5 minors or reds or a bad 3♥ preempt in the other

[awm]

Technically Muiderberg shows five in the bid major and 4+ in a minor (does not require five). This is normally combined with a multi 2♦ that always shows a six-card major (with or without additional strong options).

The 2M bids that show 5+/5+ should have a different name; sometimes they are called Polish Twos (although technically the 2♥ in Polish Twos is 5+♥ and 5+ any, which could be spades).

People who play a 2♦ multi that "could be five card suit" are not also playing Muiderberg; they include those sorts of hands in the 2♦ opening (along with some six card weak twos with non-great suits and maybe also some 5332 hands). They use the 2M openings for something else (2♥ as both majors is popular as is 2M as intermediate but there are definitely other possibilities too).

[jillybean]

Thanks! I was invited to play M/M with Muiderberg being 5M5m , 54 makes so much more sense.
Do we need 5M4m? Playing Multi with 2M being a 5 card preempt sounds like an useful gadget, or Multi 5crd+ and 2M intermediate, the possibilities are endless

[DavidKok]

You can play this way (though I think it's slightly more popular to invert the two, playing 2♦ as the 'garbage' preempt and 2M as the 'normal' preempt). Do keep in mind though that if you play a five card preempt you have one of three options:

• Permit preempting on 5M332.
  
• Permit preempting with 4 cards in the other major.
  
• Play Muiderberg.

Note that a 5(+) card preempt contains more options, but if you specifically box off the six card suits with a multi you need to ask yourself if you're winning on the 5M332 and 5M4oM preempts. Personally I think the answer is 'yes, if done right' but I think the opposite belief is more commonly held.


Multi 5+ with 2M intermediate is an option that quite a few strong pairs play. It allows the flexibility of aggressive preempts with the constructive 2Ms. Ultimately it boils down to how much you like the constructive preempts, I feel. Personally I score far too well with '2♠ shows a weak hand with some spade length', and I'd hate to have to open 2♦ with that. But opinions are divided, and it's a very sensible approach.