CID Blue army Attack Defend Row min Red army Attack 50 80 . 50 Defend 60 0 O Column max 60 80 This does not have pure strategy Say, Pis probability that Red army choose attack ( I - P) is 17 1 1 1' Defend If Blue asmy choose attack EV = 50p +60 ( 1 - P ) of Blue asmy choose defend EV = bop + 0 ( 1 - P ) Decision maker B