Tune Aspiration Search with Chess Tuning Tools.

[TheBlackPlague]

This tuning was done using Chess Tuning Tools (CTT) by @kiudee. Multiple provided optimums were tested, but from the tuning, the following optimum worked best:

ASPIRATION_SIZE = 16;
ASPIRATION_DELTA = 23;
ASPIRATION_DEPTH = 4;

ELO Difference

TC: 10s + 0.1s

Using UHO_XXL_+0.90_+1.19.epd:

ELO   | 15.91 +- 8.69 (95%)
SPRT  | 10.0+0.10s Threads=1 Hash=16MB
LLR   | 2.95 (-2.94, 2.94) [0.00, 5.00]
GAMES | N: 3672 W: 1181 L: 1013 D: 1478