Joost 't Hart wrote:
On 09/01/2010 06:11 PM, Fulvio wrote:
Hi,
There are some aspects that i want to change in scid:
In the Tree Window:
1) I want to change the the performance statistic. Actually it is just a
lookout in a table based on the opponents elo average, i want to use the
fide formula for the performance calculation and express the result as
+/- over the AvElo (es instead of the actual AvElo 2700 Perf 2695 i'll
prefer AvElo 2700 Perf -5)
Calculation is fine for me; I do not share your preference for
displaying, which I feel is rather unusual.
Just to clarify my idea: the actual perfomance calculation don't take in
consideration the average elo of the player.
If a 2700 player beats a 2500 player you get a performance of 3499 (!?)
If a 2000 player beats a 2500 player you get a perfomance of 3499
I remember Nunn saying in "Secret of Practical Chess" that the
perfomance is significative only compared to the average elo, and i argree.
If there is a line with AvElo 2500 and Perf 2600 i can consider it a
very good line.
Another line with AvElo 2700 and Perf 2650 is to be considered inferior.
What i'm thinking about is calculating the FIDE expected result { 1 /
( 1 + pow10((oppElo - elo) /400.0)) }, calculate the perfomance
accordingly and show the difference from the AvElo.
This way a + line is a good line (players who played that move performed
above their elo) and minus line are dubious (they lose elo points).
For browsing-only: What is your problem with the browse windows you can
produce via Right-Click/Browse from the Game List? I use them very often.
Too small.
Thanks, for you opinions.
Bye, Fulvio
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