Improve caching of must capture state

Improve caching of must capture state

giveaway STC
LLR: 2.97 (-2.94,2.94) [-10.00,5.00]
Total: 473 W: 222 L: 167 D: 84
http://www.variantfishtest.org:6543/tests/view/6021b77b6e23db669974e884

giveaway LTC
LLR: 2.98 (-2.94,2.94) [-10.00,5.00]
Total: 361 W: 168 L: 114 D: 79
http://www.variantfishtest.org:6543/tests/view/6021ba026e23db669974e893

losers STC
LLR: 2.99 (-2.94,2.94) [-10.00,5.00]
Total: 387 W: 204 L: 144 D: 39
http://www.variantfishtest.org:6543/tests/view/6021b78d6e23db669974e887

losers LTC
LLR: 2.97 (-2.94,2.94) [-10.00,5.00]
Total: 690 W: 329 L: 273 D: 88
http://www.variantfishtest.org:6543/tests/view/6021b9fb6e23db669974e891