Consider double blocked squares in CTF evaluation

Consider double blocked squares in CTF evaluation

racingkings STC
LLR: 2.97 (-2.94,2.94) [0.00,10.00]
Total: 1004 W: 387 L: 296 D: 321
http://www.variantfishtest.org:6543/tests/view/5e9b4ecf6e23db36d55f29cc

racingkings LTC
LLR: 2.95 (-2.94,2.94) [0.00,10.00]
Total: 1647 W: 504 L: 414 D: 729
http://www.variantfishtest.org:6543/tests/view/5e9b572b6e23db36d55f29d2

kingofthehill STC
LLR: 2.96 (-2.94,2.94) [0.00,10.00]
Total: 1849 W: 884 L: 765 D: 200
http://www.variantfishtest.org:6543/tests/view/5e9b4eb86e23db36d55f29c9

kingofthehill LTC
LLR: 2.96 (-2.94,2.94) [0.00,10.00]
Total: 1252 W: 602 L: 493 D: 157
http://www.variantfishtest.org:6543/tests/view/5e9b57236e23db36d55f29d0