1. In chess, when the King is in check, you either have to move the king or block the check using another piece. In your case, it sounds like you did not move your King or block the check, instead you moved another piece which did not stop the check. So, your move on that turn was an illegal move. 2. If you make an illegal move in a rated tournament standard game, you will either lose the game immediately or after the arbiters have decided the game by carefully reviewing the game. Most of the time, if an illegal move has occurred during a game, the arbiter may decide to restart the game, or by default, your opponent wins. Which means that you would likely lose the game due to the illegal move rather than your son's 'checkmate'. Hope this helps!
Silly question about Chess rules
1. In chess, when the King is in check, you either have to move the king or block the check using another piece. In your case, it sounds like you did not move your King or block the check, instead you moved another piece which did not stop the check. So, your move on that turn was an illegal move. 2. If you make an illegal move in a rated tournament standard game, you will either lose the game immediately or after the arbiters have decided the game by carefully reviewing the game. Most of the time, if an illegal move has occurred during a game, the arbiter may decide to restart the game, or by default, your opponent wins. Which means that you would likely lose the game due to the illegal move rather than your son's 'checkmate'. Hope this helps!
This highly depends on the time control of the tournament.
In speed chess (say 5 min per game) usually making an illegal move loses the game. There can be some rules about it, like you can't take their king but have to announce the illegal move, but ok.
In normal chess you don't immediately lose your game if you make an illegal move. Article 7.4 of the FIDE rules states what happens when you make an illegal move, like failing to respond to a check. Basically the position goes back to the last position before the irregularity. So just move the position back to the position with the check and make another move. The touch-move rule does apply, so if you have a move that you can make that stops the check, you need to play that move. If that move can't stop check, you're free to make any other move. The penalty of an illegal move can be 2 mins of extra time for the opponent.
Ok,
It's clear that it is an illegal move and what happens to an illegal move depends on the kind of tournament. Sometimes opponent wins not for checkmate but for an illegal move. In other circumstances, you can have a penalty (i.e. additional time for the opponent). In other, you go back and replay the move again.
Now let's put tournaments aside for a moment. You're just playing with your son or a friend. What generally happens in this case?
Go back to the position which the illegal move was played then play a legal move instead
Whatever you'd like to happen. I mean, it's a friendly game and in friendly games people decide what they want to allow. Sometimes I allow opponents to take a move back if it is a clear blunder, even though that's not allowed by the rules.
In general I'd say that friendly games just follow the normal rules of chess. So, once you realize it's an illegal move, you take it back (all the way back to where you played the illegal move) and you just play another move. If you and your son use the touch move rule, you will still need to play that same piece if you can, if you both don't bother with it, just play another move. The game of chess can only end with checkmate or stalemate, forgetting to move your king out of check is not a way the game can normally end, so it needs to be 'repaired' by another, valid move.
FIDE Laws of Chess:
7.4 a. If during a game it is found that an illegal move, including failing to meet the
requirements of the promotion of a pawn or capturing the opponent’s king, has
been completed, the position immediately before the irregularity shall be
reinstated. If the position immediately before the irregularity cannot be determined
the game shall continue from the last identifiable position prior to the irregularity.
The clocks shall be adjusted according to Article 6.13. The Articles 4.3 and 4.6 apply
to the move replacing the illegal move. The game shall then continue from this reinstated position.
https://www.fide.com/FIDE/handbook/LawsOfChess.pdf
Hi,
I am a beginner and I have a very silly question. I was playing with my kid and I had White King in e7 and my son Tower in b7. There were other pieces around.
He said: "Check" (hope this is the right term in English since in Italy we use "Scacco").
I was a bit distracted and moved another piece instead of removing King from the "Check". Then my son did "Checkmate".
My doubt if this is allowed by Chess rules. I mean, on Chess.com this couldn't happen because the tool would have forced me to move the King.
What happens in a real live game?
Would my son have won the game?
Would the chess referee have asked me to move the King?
Thanks in advance for your reply.