To show a movement of a piece on a chessboard.

**amauryxiv** · February 5th, 2024, 08:30 PM

Hi everybody.

Here's my problem: I'm trying to code a GUI for a chess game. I want to ensure that when an AI plays, the user sees the piece of the chosen move moving.
To do this, I change the coordinates of the piece and draw it in a JPanel which contains the chessboard. I refresh the screen regularly to get the movement of the piece.

The piece moves very well, without aany problem, but other components than the chessboard (for example a list of notation of moves played) are impacted and cause strange and unexpected things.

To refresh the screen regularly I use a timer which regularly calls the paintImmediately() method on the JPanel displaying the chessboard.

I suspect that I must have done things incorrectly but I can't find a solution.

Any help will be welcome.
Thank you in advance.

P.S. sorry for my english.
P.S. I tried to attach an image to this message, but could not manage.

**Helium c2** · March 6th, 2024, 06:41 PM

This would be on an applet. AWT container. I know how to play chess. The movements on the pond, only eats diagonal. But moves forward and not backward. Knight moves in a L shape route. Bishop moves only diagonal, but can go the whole board. The king is what you are trying to trap. Check mate. Queen, likewise moves diagonal and also side to side, the whole board. Rookie, moves up, down, side to side. So there are a number of combinations you movements you must add. And they can only occupy that space. No illegal movements. How many combinations did you come up with first on your problem? I'm interested too. GUI game on an applet.

**amauryxiv** · March 8th, 2024, 07:43 PM

Hi Helium.
Thank you for your answer.
I know the rules of chess very well. My problem is not there.
The problem is only graphic: the pieces move very well and I made sure that all the moves are legal.
But at the end of the animation of the part which plays the part, the display of the window is disrupted as a whole...

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