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Stockfish 17062902_mstembera - new version!

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Stockfish, chess engine UCI

 Leader rating list JCER = 3372
🔬 Author: mstembera 

 More:
Timestamp: 1498695077 

 Magic::index() 
Make magic_index() a member of Magic since it uses all it's members and keep us from having to pass the function pointer around to init_magics(). 

 No functional change 
Closes #1146 

 ⭐⭐⭐   Stockfish 17062902_mstembera

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