Use faster attackers generation for more variants

Use faster attackers generation for more variants

makruk STC
LLR: 2.98 (-2.94,2.94) [0.00,10.00]
Total: 1175 W: 127 L: 66 D: 982
http://www.variantfishtest.org:6543/tests/view/6026a0606e23db669974e8f7

minishogi STC
LLR: 2.96 (-2.94,2.94) [0.00,10.00]
Total: 3706 W: 1931 L: 1775 D: 0
http://www.variantfishtest.org:6543/tests/view/6026a0516e23db669974e8f4

standard STC
LLR: 3.00 (-2.94,2.94) [-10.00,5.00]
Total: 31166 W: 6843 L: 6953 D: 17370
http://www.variantfishtest.org:6543/tests/view/6026a0686e23db669974e8f9