Isolated pawns tweak (Bench: 4085694) #2706
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Give opposed doubled isolated pawns only the Doubled penalty. The other isolated pawns get the Isolated penalty and the WeakUnopposed penalty. I also replaced the popcount condition with an opposed check, which is non-functional, but probably gives a speadup.
Passed STC (https://tests.stockfishchess.org/tests/view/5ed0f0f0042fa6d77c3552f5):
LLR: 2.96 (-2.94,2.94) {-0.50,1.50}
Total: 121832 W: 23562 L: 23195 D: 75075
Ptnml(0-2): 2092, 14064, 28313, 14279, 2168
LTC: (https://tests.stockfishchess.org/tests/view/5ed22e40042fa6d77c355387)
LLR: 2.96 (-2.94,2.94) {0.25,1.75}
Total: 103368 W: 13232 L: 12768 D: 77368
Ptnml(0-2): 693, 9484, 30919, 9842, 746
Bench: 4085694