Enable faster attack calculation for more variants

Enable faster attack calculation for more variants

seirawan STC
LLR: 2.95 (-2.94,2.94) [0.00,10.00]
Total: 311 W: 160 L: 75 D: 76
http://www.variantfishtest.org:6543/tests/view/602ff3976e23db669974e93f

capablanca STC
LLR: 2.96 (-2.94,2.94) [0.00,10.00]
Total: 285 W: 151 L: 66 D: 68
http://www.variantfishtest.org:6543/tests/view/603000616e23db669974e943

shogi STC
LLR: 2.97 (-2.94,2.94) [0.00,10.00]
Total: 635 W: 373 L: 261 D: 1
http://www.variantfishtest.org:6543/tests/view/602ff24e6e23db669974e93c