What happens if a king moves into check?

Answered by Willie Powers

When a king moves into check, it means that the king has moved to a square that is being attacked by an opponent’s piece. This is a forbidden move in chess, as it exposes the king to capture and puts it in immediate danger. Therefore, a player must not make any move that would place his or her king in check.

If a king moves into check, the opponent has the opportunity to capture the king on their next move, resulting in checkmate and the end of the game. The purpose of the game is to checkmate the opponent, which occurs when the opponent’s king is in check and there are no legal moves available to remove the king from attack.

To illustrate this, let’s consider a scenario. Imagine a game where White moves their king into a position that is attacked by a black piece. For instance, if White moves their king to a square that is under attack by a black rook, it would be an illegal move since the king cannot move into check.

In this situation, Black has the advantage and can take advantage of White’s mistake. Black can simply capture White’s king on the next move, resulting in checkmate. It’s important to note that in chess, the king is the most valuable piece, and the primary objective is to protect the king while simultaneously attacking the opponent’s king.

To avoid moving the king into check, players must carefully plan their moves, considering the safety of their king at all times. It’s crucial to be mindful of the opponent’s pieces and their potential threats. This requires strategic thinking and foresight to anticipate and prevent any possible attacks on the king.

If a king moves into check, it is considered an illegal move in chess. The opponent then has the opportunity to capture the king and achieve checkmate, resulting in a victory. To play successfully, players must prioritize the safety of their king and avoid making moves that expose it to immediate danger.