The King is the most important piece in the game of Chess. This is because the objective of the game is to capture your opponent's King.
The King has the ability to move one space in any direction.
However, the King can not put himself in danger (or been put in danger by any other of his pieces).
That means that two Kings can never be side by side (at least one space between them).
If the King can be captured he is said to be "IN CHECK".
If he can not move to a square where he is not threatened, and if the checking piece can not be captured or blocked, the King is said to be in "CHECKMATE" and the game is over.
That is the reason because his value is "PRICELESS"
If the King is not directly thratened but he can not move to a safe square, I mean where other enemy piece can capture him that is called __ __ __ __ __ __ __ __ __ and the game is a draw, even if the enemy has all the advantage.
Let's find What happens
It is the turn for the black pieces in this diagram:
What happens in this situation?
What is this phenomenon called?