Well you have to assume your opponent will go for your king, and wise versa, but if you have a good plan, if you can checkmate your opponent faster then he can checkmate you, you dont need any support for your king.
fortifications
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before an attack could be launched,the fortications of the kingdom must be evaluated so that it could ready to withstand a counterattack. to be aggressive is also to be defensive.a fortified position does not invite attack but invite losses.
overprotection of the king tends us to be more passive than aggressive