That brings us to another positional factor. The role of the King changes as the pieces disappear from the board. Consider the diagram, which is from a real game.
The preceding moves were 13.Bxh7+ Kxh7, where White sacrificed a Bishop on d3 for a Pawn. The Black King seems to be in no particular danger, but within a few moves every White piece -- including the two Rooks -- was attacking squares around the King. Black was unable to cope with the numerous threats and lost the game.


