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
I thank the Lord for not pairing me with Black against Magnus Carlsen in the first round.
Nigel Short 2017
Thank the stars that I have been banned by FIDE so it is very clear I have nothing to do with this mess…
Garry Kasparov 2015
A good sacrifice is one that is not necessarily sound but leaves your opponent dazed and confused.
Rudolf Spielmann
Chess should not become an obsession. Otherwise there’s a danger that you will slide off into a parallel world, that you lose your sense of reality, get lost in the infinite cosmos of the game. You become crazy.
Magnus Carlsen 2010
After the 2nd game I could have returned to Moscow. There was only one way I could have won this match.
Boris Spassky (1974)