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Same match points, different percentages

#1 User is offline   sandiem 

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Posted 2020-September-11, 09:08

can someone explain to me how 3 pairs are credited with the same number of matchpoints but there are 3 different percentages?

And also, sometimes, a pair with a higher no of matchpoints (and no sit-outs or averages) are given a lower percentage than another pair.
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#2 User is offline   jnichols 

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Posted 2020-September-11, 09:55

View Postsandiem, on 2020-September-11, 09:08, said:

can someone explain to me how 3 pairs are credited with the same number of matchpoints but there are 3 different percentages?

And also, sometimes, a pair with a higher no of matchpoints (and no sit-outs or averages) are given a lower percentage than another pair.


Suggest you provide the tournament number / date / and player IDs to BBO. Can't answer your question without more info.
John S. Nichols - Director & Webmaster
Indianapolis Bridge Center
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#3 User is offline   pgrice 

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Posted 2020-September-12, 09:29

View Postsandiem, on 2020-September-11, 09:08, said:

can someone explain to me how 3 pairs are credited with the same number of matchpoints but there are 3 different percentages?

And also, sometimes, a pair with a higher no of matchpoints (and no sit-outs or averages) are given a lower percentage than another pair.


It's called a rounding error. Calculate the %age score for each player on each board; but only to 4 sig figs ... 51.11% say. Thus, depending on the number of tables this number will be more or less accurate. Some scores get rounded up, some down. To calculate each pairs final score; add up the %age scores on all the boards played; divide by number of boards played. Some pairs can get lucky ... others not so. We've been doing it this way for the past [some number] years; why should we change now?
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