Don't prune discover checks in qSearch
STC:
LLR: 2.96 (-2.94,2.94) [0.50,4.50]
Total: 23176 W: 5320 L: 5039 D: 12817
http://tests.stockfishchess.org/tests/view/
5cfbc9350ebc5925cf094ab3
LTC:
LLR: 2.95 (-2.94,2.94) [0.00,3.50]
Total: 128428 W: 22222 L: 21679 D: 84527
http://tests.stockfishchess.org/tests/view/
5cfbf0b70ebc5925cf094ebc
Bench:
3883245
// Don't search moves with negative SEE values
if ( (!inCheck || evasionPrunable)
+ && (!givesCheck || !(pos.blockers_for_king(~pos.side_to_move()) & from_sq(move)))
&& !pos.see_ge(move))
continue;