The condition "depth >= 4 * ONE_PLY" does not seem needed at this point.
passed STC:
LLR: 2.96 (-2.94,2.94) [-3.00,1.00]
Total: 32751 W: 7178 L: 7078 D: 18495
http://tests.stockfishchess.org/tests/view/
5d8e46660ebc590f3bebad5e
passed LTC:
LLR: 2.95 (-2.94,2.94) [-3.00,1.00]
Total: 31693 W: 5299 L: 5196 D: 21198
http://tests.stockfishchess.org/tests/view/
5d8e4b4f0ebc590f3bebb165
Bench:
4062526