Have you ever made an illegal move?

In my game (in a national game against a grandmaster!)
He made the move Rd8# but just because of just 10 or 20 seconds, my opponent did not notice it!
I later won that game!

oops, @Kartikey_Tripathi , that was the wrong link. search for carlsen blitz controversy if you're interested. there are articles and videos of it.

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