|1NT 9-11 points Opening
This is an example of what can be done by searching bidding records. Note that, as with any search driven directly from the play database, this can take a very long time, several hours if you have more than one CD of data. In BRBR version 2, we decided to add the "Complex Computer Count" suggested by Kaplan and Rubens (K&R).
Here are some results for opening Notrump on 9.0-11.0 points using the K/R scale:
|As you can see from the averages, the advantage in
scores (opener-relative) to this kind of 1NT opener is quite noticeable:
We look for 10 HCP or less and an opening of 2D, and at least one 6-card major. This currently had to be done in two stages, looking for 6H and subsequently 6S. However it is possible that in some future enhancement of BRidgeBRowser that a scripting language will enable the user to compose boolean requests. The biggest problem continues to be: how to decide which term to search on first if it is desired to avoid scanning the entire database in a linear fashion.
We look, initially, for an opening of 1D, response of 1H thru 1NT followed by a rebid of 2H and opponents passed throughout.
The results are not shown here but for those with BRBR already, here is the play file with the hands pulled. Pretty astounding how many people clearly have no idea what a reverse is! And it shows, in the results. You can download a complete working version of BRidgeBRowser with just these 9572 play records in, to play with.
The first thing I noticed in the results is that a reverse is not generally accepted as forcing, a position I have always held (and am in a tiny minority of North American players to so believe). Of course if there are enough who don't believe in reverses then that is another possible explanation. Tell us what YOU think by joining the BRBR discussion list!
Of course, the same technique can be used for 1H 2S etc etc.
Perhaps we need to have a way to search for arbitrary (alternative) bidding strings in the same play record. Watch this space!