Check

	a	b	c	d	e	f	g	h
8									8
7									7
6									6
5									5
4									4
3									3
2									2
1									1
	a	b	c	d	e	f	g	h

Example of a check - the black King is threatened by the white Queen.

Check is a situation in chess and other chess-like games that describes a king that is threatened by another piece. It is illegal for a king to move into check in the official international rule, which is why the game ends in a draw if there are only two kings, since they can't check each other. It is also illegal for a king to castle to escape check, end up in check, or encounter check while castling. If the king is in check and cannot:

1. Capture the threatening piece with your pieces (but the king cannot capture if the opponent threatening piece is defended)
2. Put a piece between the king and the threatening piece (blocking a check)
3. Move the king to a square that is safe for it

it's checkmate, is when a player cannot get out of check in any of the 3 ways, this ends the game immediately and the player who wins achieves Checkmate and wins the game.

Video

Chess Move Types Check