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stockfish/src
31m059andStéphane Nicolet 7240a90bf9 Use stronglyProtected
~stronglyProtected is quite similar to ~attackedBy[Them][PAWN] & ~attackedBy2[Them],
the only difference appears to be that the former includes squares attacked twice
by both sides. The resulting logic is simpler, and the change appears to be at least
Elo-neutral at both STC and LTC.

STC:
LLR: 2.95 (-2.94,2.94) [-3.00,1.00]
Total: 35924 W: 7978 L: 7885 D: 20061
http://tests.stockfishchess.org/tests/view/5c14a5c00ebc5902ba11ed72

LTC:
LLR: 2.96 (-2.94,2.94) [-3.00,1.00]
Total: 37078 W: 6125 L: 6030 D: 24923
http://tests.stockfishchess.org/tests/view/5c14ae880ebc5902ba11eed8

Bench: 3646542
2018-12-16 10:04:49 +01:00
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