How to open the following:
S QJ9
H K7
D AQJT5
C JT8
Normal bid is to open 1D.
Consider opening !NT with the playing strength of this hand, particularly if NV.
How to open?
S AKJ9
H 5
D K73C
C J8652
Normally 1C. However....
In third seat, the better opening is 1S. Keep in mind: which suit is the better lead director -- which bid has more preemptive value against your unlimited LHO?
When might it be a consideration to open a weak 2 with only five cards, such as:
S KQJT6
H 3
D QJ43
C 972
1. In third seat.
2. Your suit is a good lead director for partner.
3. Your side is NV.
Your side does not have the Balance of Power, but the Opponents might not reach the best contract with you opening 2S.
How best to open this hand?
S 7
H 93
D KQT975
C QT62
NV, consider opening 3D, a small lie.
In 1st seat, what is the chance of preempting your partner with a weak opening?
33%
In second seat, what are the chances of preempting your partner with a weak opening?
50%
This is why 2nd seat preempts should be SOUND, showing good suit quality, particularly when Vul.
In 3rd seat, what is the chance of preempting your partner with a weak opening?
Zero.