Author: Stephen Ham
Date: 14:35:27 05/12/05
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Dear KK, I respectfully disagree with your negative view of Bookup's backsolving function. I have a Bookup database with 1.3MM moves in it, all input manually by me over the past 15-years. Given that size, I never use the automatic backsolve function. Anyway, I find the ability to backsolve to be one of the finest features of Bookup, plus the fact that it catches ALL transpositions. So if an improvement is found for Black on move 27 of a Dragon Sicilian that leads to a Black advantage, then that entire variation, plus all transpositions to that line, favors Black back to the point where an alternate move for White exists that alters the overall assessment. Even if others are aware of this solitary TN which alters the line's former evaluation adversely, they don't automatically know what else should/can be played. With Bookup, one can tell at a glance which remaining lines are OK for White to play. But without Bookup, one would need to consult books and periodicals and games databases and chess engines to see if alternative lines are worth playing. Given this ability, and given a very large database of information, such as mine, one can know in advance if certain openings are objectively sound (assuming the assessments at the nodes are valid), as well as variations within specific openings. I use Bookup to organise and manage my opening theory for my Correspondence Chess games. As such, as long as I keep my data current, I find I'm better prepared in the openings than my opponents, who are armed only with books and game databases. Also, what does one do with data gleaned from periodicals? Suppose one plays through heavily annotated games in books and periodicals. Unless one cross-references the annotated improvements for that game into ECO, then that data is often wasted. And even if one does copy that data into ECO, what about all the other lines that can transpose ito it? I solve this problem by entering data from annotations directly into Bookup and then manually backsolve (it just takes seconds). Problem solved, since Bookup now has the new data, the new evaluations, and all lines transposing to that position are now updated. All the best, Steve
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