i've had a similar problem, are you using Chrome?
i solved it by using Firefox instead
help!
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Common problem - you need to ensure your Java & browser are fully updated. Also check that you have Javascript enabled - probably a good idea.
What O.S. & browser are you using ?
i can't move the chess pieces to the exact position i wanted. i also experience sticky piece on my mouse pointer. please help me solve this problem. thanks...