A situation when a piece or a pawn cannot or is forbidden to move because it could expose the king for an attack or would expose a more valuable piece behind it to capture.
In the following example Qa3 and Re7 are pinned.
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Quotes of the Day
Kasparov is great as a chess player, but all his attempts to prove himself as an organizer – let’s say, is beyond the champion’s level.
Boris Gelfand 2016
Vugar Gashimov deserves to be immortalized!
Mahir Mamedov 2014
The competition in the men’s tournament has grown massively over the past 20 years. Chess is becoming more and more popular, and there are no weak teams in the tournament any longer.
Andrey Filatov
Karpov, Kasparov, Korchnoi have absolutely destroyed chess by their immoral, unethical, prearranged games. These guys are really the lowest dogs around, and if people knew the truth about them, they would be held in more contempt than Ben Johnson, the runner, and they’re going to know the truth when I do this book!
Robert Fischer September, 1 1992
Everything is very concrete nowadays. The computer often gives unnatural moves which are correct, but sometimes hard to remember. You know a line is correct, but then your forget something and lose terribly.
Daniel Stellwagen 2010