Blue Marlin - Stockfish derivative that provides sharp and attractive games. The engine is suitable for playing and analyzing, it supports Polyglot books.
I was skeptical about implementing most of the recent patches to Blue Marlin so as not to lose its style. However, after several dozen attempts, I think that the satisfactory settings were found and it is worth to release Blue Marlin 15.6.
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How often should it sacrifice pieces? Yes.