Is jumping mandatory?
Yes, if you can capture, you must capture in most rule sets.
Can a king move any distance?
In international draughts yes; in American checkers, kings move one diagonal square.
What happens if a player cannot move?
That player loses the game.
Can pawns move backward?
No, only kings can move backward.
Is Checkers solved?
American checkers is weakly solved: perfect play leads to a draw.

