Disable pin/qsearch, reduce undefended.  bench: 5473347

ELO: 17.42  +- 99%: 20.28 95%: 15.39
LOS: 99.98%
Wins: 449 Losses: 350 Draws: 1177
Enable singular extension, and re-enable q-search null futility.

ELO: 16.68  +- 99%: 14.37 95%: 10.91
LOS: 100.00%
Wins: 880 Losses: 692 Draws: 2348