IMP to VP scale changed (VP 換算表修訂)

[prince (支那是貶義詞?)]

有在注意臺大盃賽訊的人應該知道 WBF 的 VP 換算表改了。
我在 WBF 網站找不到相關訊息，但有在網路上找到底下這篇:
http://www.bridgebase.com/forums/topic/55389-wbf-vp-scale-changes/

引述其中 HenryB (他是 WBF 計分委員會的成員 Henry Bethe (USA)) 所說的公式:

HenryB

Group:Members
Posts:2
Joined:2012-September-17
Posted 2012-September-17, 12:23

The function is

VP(Winner) = 10+10*((1-Tau^(3M/B))/(1-Tau^3)) with a maximum of 20
VP(loser) = 20 - VP(winner)

where
Tau = (5^.5 - 1)/2 which is the "golden mean" and approximately 0.618...
M is the margin
B = 15*(number of boards^.5)

Both values are rounded to 2 decimals and truncated

Occasionally because of the rounding
the rule V(i+1) - V(i) <= V(i) - V(i-1) will be violated.
In that case the value of V(i) is increased by .01.
Usually this will eliminate all violations;
sometimes it takes as many as four iterations of this procedure
to eliminate all of them.

A VP score of 15-5 will be achieved when M = B/3
(five times the square root of the number of boards)
A margin of 2B/3 will get a VP score of 18.09
A margin of B or greater will get a VP score of 20

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→ tnf:我看不懂耶~如有計分，我應該是富好多好多吧...orz
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→ prince:說你是女版陳建州果然沒錯  -_-
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