remove the QRECAPTURES and QSEARCH_RECAPTURES stages as they can be
incoorporated in QCAPTURES stage with a simple condition on depth.
passed STC:
LLR: 2.95 (-2.94,2.94) [-3.00,1.00]
Total: 214964 W: 46188 L: 46443 D: 122333
http://tests.stockfishchess.org/tests/view/
5a98544b0ebc590297cc8e35
passed LTC:
LLR: 2.95 (-2.94,2.94) [-3.00,1.00]
Total: 14552 W: 2404 L: 2274 D: 9874
http://tests.stockfishchess.org/tests/view/
5a9947b20ebc590297cc8e93
Bench:
6361582