Updated Chess Opening Test Set: Nunn-Lacrosse-Silver

[supernova]

Updated chess opening test set!

I've combined the classic test sets from John Nunn, Marc Lacrosse, and Albert Silver into a single set, now featuring 137 opening lines. This comprehensive test set has been validated using the top 35 chess engines from the CCRL list. I've double-checked each position to ensure its evaluation falls within a narrow range of [-0.80, 0.80] centipawns, guaranteeing a high level of accuracy.

Regards.

[ZamChess]

Thank you !