关于第一点，本方必须满三张，然后才可以根据局势判断。
具体可以读一下规则上怎么写的
“On his turn and before drawing his card from the deck, a player may claim one or more Flags. In order to do so, he must have a completed formation of three cards on his side of the Flag, and he must be able to prove that Troop cards on the opponent's side of the Flag cannot beat this formation.”
