No underpromotion in noisy movegen #100
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Moved underpromotions to the quiet movegen which avoids generating them in quiescence search, as well as in the first stage (noisy) of normal search. As underpromotions beating queen promotions is extremely rare, this saves time at a very low cost to search quality. Probably also helps prepare removing promotions from the searchHistory heuristic.
ELO | 5.20 +- 4.07 (95%)
SPRT | 10.0+0.1s Threads=1 Hash=32MB
LLR | 2.97 (-2.94, 2.94) [0.00, 5.00]
Games | N: 15767 W: 4577 L: 4341 D: 6849
http://chess.grantnet.us/viewTest/3876/
ELO | 3.61 +- 2.86 (95%)
SPRT | 60.0+0.6s Threads=1 Hash=128MB
LLR | 3.06 (-2.94, 2.94) [0.00, 5.00]
Games | N: 28017 W: 7066 L: 6775 D: 14176
http://chess.grantnet.us/viewTest/3877/