Stockfish 18011309 - new version!

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Stockfish, chess engine UCI

 Rating JCER = 3389
🔬 Author: Günther Demetz

 Timestamp: 1515830483 
Simplify verification search (#1362) 

 1. avoid recursive call of verification. 
For the interested side to move recursion makes no sense. 
For the other side it could make sense in case of mutual zugzwang, but I was not able to figure out any concrete problematic position. 
Allows the removal of 2 local variables. 

 2. avoid further reduction by removing R += ONE_PLY; 

 Benchmark with zugzwang-suite (see #1338), max 45 secs per position: 
Patch solves 33 out of 37 
Master solves 31 out of 37 

 STC: 
LLR: 2.95 (-2.94,2.94) [-3.00,1.00] 
Total: 76188 W: 13866 L: 13840 D: 48482 

LTC: 
LLR: 2.95 (-2.94,2.94) [-3.00,1.00] 
Total: 40479 W: 5247 L: 5152 D: 30080 

bench: 5340015

 ⭐⭐⭐   Stockfish 18011309 - download

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