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Up Topic Rybka Support & Discussion / Aquarium / Deep Position Analysis
- - By turbojuice1122 (Gold) [us] Date 2007-06-28 15:07
I would suggest having something similar to the Fritz GUI's Deep Position Analysis, but with the following changes:
(1)  Have a method for "manual pruning", i.e. you are watching the analysis and you see that it's going into an irrelevant line or a line that is bad enough--it would be nice to be able to say "stop analyzing this stupid line and go to the next line in the plan."
(2)  Have a more general option in the number of lines in the branching for each successive ply--currently, you can only have more than one for the first four plies, but some people might want to have more than this, especially if they're going out of town for a couple of weeks and want some nice, thorough, high-quality analysis when they return.  An option like "number of plies with possible branching" thus might be helpful.
Parent - By Uly (Gold) [mx] Date 2007-06-28 15:41
I stopped using the DPA when randomized Rybka came out. I use it the wrong way, analyzing one position several times to get different moves instead of using multi-PV.

This way I can stop when I feel that adding more lines to keep analyzing would yield some loss of time.

Consider the following example (It's just an example):

I analyzed the position to ply 14 and Nc3 came with a 0.33 score, then I stopped the analysis and started it again. Since the analysis is still on the hash, Bc4 came instantly with the same score.

I repeat the process and now Be3 comes instantly with the same score. I do it again and now things are different, the next move has a lower score, however I let it run for some seconds and at depth 15 Be2 comes with the same score.

So, doing all this was the same than doing a MultiPV of 4 (I guess), but how do I know if I should do a MultiPV of 3 or of 5? NOT having to try different MultyPVs on the position several times (like DPA does) saves a lot of time.

The problem is that the process is not automated, but I'd want Rybka GUI's DPA to do something like running randomized Rybka several times on the position to know what moves to include for future analysis, being able to use a "Time or Ply" option, and take transpositions into account (I remember DPA analyzing the same positions over and over)...
Parent - - By Victor Zakharov (*****) [ru] Date 2007-06-28 16:41
Thanks, turbojuice1122!

Rybka GUI will have delayed analysis mode. It is based on Chess Assistant backgound analysis, but simpler to use and with more automatics.

As compared with Fritz GUI deep analysis it is much more flexible (including manual prolongation of lines and searching additional alternatives) and allows to reuse results. Although main concept is implemented already, heavy testing of delayed analysis mode will start a bit later with finishing tree mode.
Parent - By Kapaun (****) [de] Date 2007-10-03 11:26
That sounds interesting, because I'm quite regularly using the DPA feature of the Fritz GUI. Something like that in the Rybka GUI would certainly improve the chances that I buy this GUI quite a bit... :)
Another "improver" would be bookbuilding options like in the Fritz GUI - but better and without bugs. ;)
Parent - By billyraybar (***) [us] Date 2007-07-08 00:41
As a sidenote with respect to DPA in Fritz - there is a way to 'stop analyzing this stupid line".  It's a trick.  When you see a stupid line, right click in the analysis window, then click properties to bring up engine parameters window.  When you click 'ok' Rybka will immediately make its move.  So you can keep doing that for white and black variations until a line that interests you is reached.
Up Topic Rybka Support & Discussion / Aquarium / Deep Position Analysis

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