Remove mobility area for unsafe checks. Also separate the evaluation terms
for unsafe checks and blockers for king with adjusted weights.
STC:
LLR: 2.95 (-2.94,2.94) [0.50,4.50]
Total: 124526 W: 28292 L: 27504 D: 68730
http://tests.stockfishchess.org/tests/view/
5d5138290ebc5925cf1070c3
LTC:
LLR: 2.96 (-2.94,2.94) [0.00,3.50]
Total: 84968 W: 14499 L: 14083 D: 56386
http://tests.stockfishchess.org/tests/view/
5d527cfa0ebc5925cf107f93
Bench:
4139590