Increase outflanking weight to 12

[snicolet]

Give more incentive to king activity in the endgame by increasing the weight of the "outflanking" variable from 8 to 12 in the function evaluate_initiative().

Finished yellow after 133102 games at STC:

LLR: -3.07 (-2.94,2.94) [0.00,4.00]
Total: 133102 W: 29535 L: 29179 D: 74388
http://tests.stockfishchess.org/tests/view/5b2b63fe0ebc5902b2e54475

Passed LTC:

LLR: 2.95 (-2.94,2.94) [0.00,4.00]
Total: 28027 W: 4918 L: 4672 D: 18437
http://tests.stockfishchess.org/tests/view/5b2ba39e0ebc5902b2e54a64

Closes #1657

Bench: 4721753

[snicolet]

Merged via 34321fc

[crossbr]

Stéphane, the (modern.exe) compile for this commit is 1,141 KB, whereas the previous compiles have been 1,234 KB. And then when I went to use it, it crashed 8 minutes in, which is very unusual. Any idea why this compile is so much smaller than the previous compiles?

[snicolet]

I have absolutely no idea, maybe the Abrok guys have changed compiler or something like that? In fact nobody among the SF dev has any control about the Abrok executable, so for the moment the best thing to do would be to ask in the forum if somebody sees the same phenomena with a modern.exe compile

[crossbr]

Ok, thanks Stéphane!