Bookup Support

[jott27]

A Root Position Study (RPS) that is performed by using engine analysis is very limited in scope. The premise is, that the engine will yield the "best possible move" based on perfect play by White and Black.
This, by its very nature, can only result in one candidate move. Any other move would be inferior and would not satisfy the criterion of "best move".
When a study starts out with more than one candidate move, regardless of how these moves were derived from Chessbase programs via their engines , then we should recognize that these moves were obtained by insufficient evaluation times and are therefor not to be considered as optimum moves. The evaluation values derived by the engine are therefore also flawed.
When they are entered into bookup it should not be a big surprise if backsolving would yield results that are in contradiction of what one would expect. Bookup does not generate evaluation numbers, they have to be entered by a user. Garbage in, garbage out.
A better way to start a RPS would be to enter all possible first moves and than perform an engine analysis on all these moves. If you want to cut down on time expenditure, you could use statistics to limit the number of moves to less than 10.
John