Chess Endgame Technique !

  In chess the endgame (or end game or ending) refers to the stage of the game when there are few pieces left on the board. Endgames can be divided into three categories:

1. Theoretical endgames – positions where the correct line of play is generally known and well-analyzed, so the solution is a matter of technique
2. Practical endgames – positions arising in actual games, where skillful play should transform it into a theoretical endgame position
3. Artistic endgames (studies) – contrived positions which contain a theoretical endgame hidden by problematic complications
   In the diagrammed position white plays and wins by force .How ?