Simplify failedLow away #1986
FailedLow doesn't seem to add any value so remove it.
STC:
LLR: 2.96 (-2.94,2.94) [-3.00,1.00]
Total: 43915 W: 9682 L: 9604 D: 24629
http://tests.stockfishchess.org/tests/view/5c5339770ebc592fc7baef74
LTC:
LLR: 2.96 (-2.94,2.94) [-3.00,1.00]
Total: 58515 W: 9670 L: 9609 D: 39236
http://tests.stockfishchess.org/tests/view/5c53cc840ebc592fc7baf6c1
Ideas for further work:
Tune the values in the revised fallingEval calculation
Consider adding a term using delta, e.g. c * (delta - 20) as an indicator of eval instability
Bench: 3318033