Chess has a special name for an attack on the king. This is called check.
Check is a problem that must be fixed. The king must get out of check. A king can never be captured.
Sometimes, there is no way for the king to get out of check.
It is checkmate and the game is over!
If your king is checkmated, you lose the game.
What do you have to do?
Put the black king in check. You can do this in only one move.
But be careful! You can’t move to a square that is defended by a black piece.