No , if your king is in check you can not counter with placing your opponent's king in check - you must respond to the move on your next turn by dealing with your king in check by moving the king out of check , removing the attacking piece by capture or by blocking the checking piece or you will need to concede / resign from the game . Look to the related link below regarding the rules of Chess .
Yes. If you have your opponents king under threat, you have to say check. If you have their king in a position to take it and they have no move left to save it, you say checkmate.No, you don't have to say check or checkmate. I used to play in USCF tournaments and we never did.
Yes, the king can move out of check, provided that doing so is a legal move (i.e. does not move into check again). If it cannot and there is no other way to defend the check, then it is mate.
Uncovering the king and it's exposure to check is an illegal move .
Yes, the king may capture the piece that is checking it.Yes, but only if that piece is on a square adjoining him, as a king has mobility of only one square per move.
No The rules state that one may never place his own King in check. Because a King can only move one square, it must be adjacent to a piece in order to attack it. But the act of moving your King adjacent to your opponent's King would be putting it in check. And so the move is not allowed. If your King is two squares away from your opponent's King, it is not attacking it, and thus it is not putting the other King in check. --CM
Yes as long as he isn't in checkmate or he cant move into another check.
The king (♔, ♚) is the most important piece in the game of chess. It may move to any adjoining square; it may also perform a move known as castling. If a player's king is threatened with capture, it is said to be in check, and the player must remove the threat of capture on the next move. If this cannot be done, the king is said to be in checkmate, resulting in a loss for that player. A player cannot make any move that places their own king in check. Despite this, the king can become a strong offensive piece in the endgame or, rarely, the middlegame.
Yes, if the king is in check, the next move must take the king out of check. You do not necessarily have to move the king, you could take the attacking piece, or block the check by moving a piece in the way.
No. You may not move INTO check. If that is the only move available, it would then depend whether or not you are already in check. If you are in check and cannot move to a square where you are not in check, it is checkmate, the game is over, and you have lost. If you are not in check, but cannot move without going into check, and you have no other piece or pawn that can move, then it is stalemate, and the game is a draw.
No.
Yes.
If what you mean by "leaving your king open" is not moving it out of check if your opponent puts your king in check, then yes, that is an illegal move. If your king is in check you mustmove to protect it. If you mean simply that you leave your king in the center of the board without castling or other protection, then it is not an illegal move. It may (and probably will) result in your king coming under attack very quickly, however.