Good Riddles

Question: I work in a battle of wits. The battle is again with only two while an army each has. Each must take a turn in stratagem but to win the leader must die. What am I?

Question: I am made of scraps and rags, Yet when I am put together, I keep you warm in the winter. What am I?

Question: There are two mothers and two daughters. They go to a restaurant and ask for 3 chairs. Why?

Question: To many, I am life's source. I am also its most valuable resource. I create and burn my own precious element, and my destruction will be my punishment. What am I?

Question: Turn us on our backs and open up our stomachs You will be the wisest. What am I?