Bi-VALVE

A theme in composition in which the movement of a defending piece to block an attacker automatically clears the way for a second attacker.

Botvinnik and Tal are among the best; I also like Spassky, but I think Petrosian is better than all of them. His weakness is too many draws, even against players he could beat easily. Maybe he lacks self-confidence. Robert Fischer
1960
Chess politic is not my dream, but I will be happy when we start to change things and organize a better chess life in the world. Anatoly Karpov
2010
Petrosian-Spassky? To think I could have watched an excellent football match instead! Mikhail Tal
1966
Garry has done a lot over the chess board – unbelievable things. He is the greatest world champion in the chess history. The question is what he has done for the federations, what he has done for his own federation. Georgios Makropoulos
2013
Some players lose ability to think independently and rely on computers completely. Lajos Portisch
2012

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