585
edits
Changes
→Purposes
* Save time: Chess programs could use [[Search|search]] from the beginning and look through all possible continuations in detail to find the best next move, but as this is quite time-consuming. In contrast, opening books can play opening moves almost instantly without searching nor heavy computing and help to save time.
* Provide a higher quality of play: Searching even with large depths can't see deep tactics, strategy, compensation. It may lose temporarily material for long term advantage.
* Provide variety: there already exists a lot of [https://en.wikipedia.org/wiki/Chess_opening_book_%28literature%29 literature] about different opening lines. As book moves are usually can be chosen [[Pseudorandom Number Generator|randomly]], whereas searches are more or less deterministic.
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