Yes you may long jump in checkers, as long as there is a space behind the piece you are jumping. The king can move in any direction and can move across any number of spaces.
Yes you are allowed to jump over your own piece as long as there is space between.
If a player does not jump when they can in checkers that piece is taken out of the game.
If your marbles are lined up long enough making it possible to jump 4 times, then yes.
Contrary to popular belief, the original game of Checkers rule pamphlet does not state that you must take a jump.
soldiers can't jump kings
In checkers, yes
Yes.
yes
Yes, why not?
NO
Of course you can!
Yes