In serious play, if a player having the move touches one of their pieces as if having the intention of moving it, then the player must move it if it can be legally moved. So long as the hand has not left the piece on a new square, the latter can be placed on any accessible square. If a player touches one of the opponent’s pieces then he or she must capture that piece if it can be captured. If none of the touched pieces can be moved or captured there is no penalty.
ECHESSPEDIA
Quotes of the Day
When you see a good move, look for a better one
Emanuel Lasker
The main thing is that you’ve got to keep on studying however old you are. You can’t just rely on your capital, so you have to try and keep up, and that is a difficult task.
Nigel Short 2016
Despite the ugliness of his decline, Bobby Fischer deserves to be remembered for the great things he did for chess and for his immortal games.
Garry Kasparov 2004
Tal develops all his pieces in the centre and then sacrifices them somewhere.
David Bronstein
I never make mistakes in chess, I only have hallucinations!
Vlastimil Hort 1987