A situation that you may face in the endgame is when you have a queen (possibly through pawn promotion) and your king against your opponent’s king. In such a case, you will be able to force checkmate quite easily. Read on to learn how!
1. Cut off your opponent’s king into a box
Move your queen so that the opponent's king is restricted to one quadrant of the board. Do not deliver checks yet.
2. Move your king to support your queen
Move your king to help restrict the enemy king and protect your queen. Remember, no piece can checkmate on its own!
3. Close the box
When it is safe to do so, your queen should be moved closer to the enemy king. This makes the “box” that you created in step one smaller.
4. Avoid stalemate
Once the “box” is very small, make sure the opposing king always has a way to move if you are not putting it in check.
5. Deliver checkmate along the edge of the board
Finally, when the opposing king is blocked by your king, deliver checkmate along the back file/rank or by moving your queen in front of the enemy king. (make sure it’s protected though)