
'I would not worry too much about vulnerability, but there is something to be
said for playing Moscito in 1st and 2nd seats and say Standard in 3rd and
4th.'
Here's the original post:
I have been considering which systems are most suitable in different
seats and at different vuls. This is entirely theoretical, at least
until I have practised all the systems thoroughly and have found a
partner as insane as I am! Any additions, comments or criticisms?

1st seat
Favourable vul - you have quite a lot of reason to be preemptive (two
opps and only one partner to preempt). This favours Weak Opening
Systems, Mini NTs, loose preempts. MOSCITO, or even better, a similar
forcing pass system, would be ideal.
Unfavourable - The opps can now interfere aggressively over a strong
bid, destroying our constructive bidding, so a multi-club would seem to
be best. A two-way pass is ruled out by the fert bid being more risky
for less gain. Preempts are also riskier for less gain, so are now
primarily used to show hands that are close to opening (6/7-10 or so).
Multi+Lucas would help resist the temptation to open 1M light,
particularly useful for playing 2/1 GF.
What would you choose for both vul and neither vul?
2nd seat
3rd seat is often well placed to preempt now, as partner has limited
his strength, so a lot of hands he now knows that his side will not
have game. For this reason, it is important to be as descriptive as
possible in one bid. A multi-club system is particularly vulnerable to
this interference, the ambiguity of the multi-club backfiring, making it
completely unsound here IMO. There is also less reason to be
pre-emptive. Maybe MOSCITO/forcing pass at green vul with either strong
NT+5 card majors or Nightmare (1C 15+bal or clubs, or any GF, weak NT,
Precision 2C opener) at other vuls - I believe the latter should handle
interference a lot better than a regular strong club? Constructive
multi+lucas as in 1st unfavourable.
3rd+4th seat
4 card majors, strongish NT (something like 14-16 assuming you open bal
12s but not bal 11s in 1st+2nd), possibly with a strong club+relays at
green vul would seem reasonable. 4 card suits let you make lead
directing bids (particularly when 1C is also natural), and lets you open
a suit and pass partner's response on weak NTs - should a 2/1 require a
5 card suit for this reason? I have Mike Lawrence's Passed Hand Bidding
on order!

Hope someone out there found this interesting!