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relationship between money game PR and match play PR?

Posted By: David Rockwell
Date: Monday, 12 May 2014, at 2:55 p.m.

In Response To: relationship between money game PR and match play PR? (David Presser)

Consider a second move reply of 43Z after an opening 41S. This is an error at all scores of course. Ignoring other moves, my Nacbracs are:

41S-43 d[X Z15] "<15

41S-43 g[X Z23] "<31

41S-43 [X Z35] "<15

This doesn't prove anything because Z is going to play better at some scores than others. However, when you assemble hundreds of these sets on a spreadsheet, you can see that the general magnitude of the error size follows a pattern like this. GG generates higher error numbers than DMP. And money generates higher errors than GG. The size of the error has to do with the score as well as the particular move.

So, if you play this move wrong and then get the next two right, your PR will be 2.5, 3.8 and 5.8 for these three scores respectively. (I think there is a DMP adjustment. But that doesn't change the point.) Short match scores generate lower errors and therefore lower PR rates than money or long match. Since all matches have the potential to reach short match scores, this makes it easier to get a lower PR at match than at money. Once again, the other points made by other people are valid as well.

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