Checkmate (4)

Another lesson about checkmate. Things get a little bit harder, this time.

Now, besides a king, black also has one or more other pieces. 

Look at the example:
Black has a king and a knight.
The white queen takes the knight: checkmate!

You will also find out that the queen is not the only piece you can use for checkmate. Rooks, bishops, knights and pawns - they can all create a checkmate.

What do you have to do?

Checkmate the king. Make sure that Black cannot take your piece.