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Rule of 2-3-4 - Based on Ely Culbertson's
preemptive bidding methods, hand evaluation based on the number of
anticipated losers in relation to the aggregate vulnerability. Perhaps
preemptive opener is considering a preemptive bid with 7 losers, uncertain
of how high to make the preemptive call:
Anticipated
Winners |
Vulnerability |
Bidding
Factor |
Calculation |
| 6 |
Favorable
(only opponents Vulnerable) |
4 |
6+4=10
Bid at 4 level |
| 6 |
Neutral
(both Vulnerable or
Non-Vulnerable) |
3 |
6+3=9
Bid at 3 level |
| 6 |
Unfavorable
(only opponents
Non-Vulnerable) |
2 |
6+2=8
Bid at 2 level |
Also see Environmental Factors
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