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.

We will note the openings used by the participants of a nine-round match. The age of openings is considerably higher than the age of both rivals. Some opening positions could be analyzed by Steinitz when he was preparing to his match with Zukertort. Mikhail Tal
1966 (Petrosian-Spassky match)
I believe that every world champion has a greatness of his own. Kiril Georgiev
2017
This one hour allows me to put the problem into the background and then, when I come back, I am much more rational and less emotional about the particular problem and I can think better about it. G. Borg
2016
Never felt more like singin’ the blues, cos I never thought that I’d ever lose… Vladimir Kramnik 2017
Tal develops all his pieces in the centre and then sacrifices them somewhere. David Bronstein

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