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Stockfish 17081508 - new version!

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Stockfish, chess engine UCI

 Leader rating list JCER = 3331
🔬 Author: Marco Costalba

 More:
Timestamp: 1502776918 

 Fix incorrect StateInfo 

 We use Position::set() to set root position across threads. But there are some StateInfo fields (previous, pliesFromNull, capturedPiece) that cannot be deduced from a fen string, so set() clears them and to not lose the info we need to backup and later restore setupStates->back(). 
Note that setupStates is shared by threads but is accessed 
in read-only mode. 

 This fixes regression introduced by df6cb446eaf21 

 Tested with 3 threads at STC: 
LLR: 2.95 (-2.94,2.94) [-4.00,0.00] 
Total: 14436 W: 2304 L: 2196 D: 9936 

 Bench: 5608839 

 ⭐⭐⭐   Stockfish 17081508 - download

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