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.

I never make mistakes in chess, I only have hallucinations! Vlastimil Hort
1987
Chess is a scientific game and its literature ought to be placed on the basis of the strictest truthfulness, which is the foundation of all scientific research. W. Steinitz
When Korchnoi was living in the USSR I called him ‘hero of socialist labour’; when he moved to the West I renamed him ‘hero of capitalist labour’! Boris Spassky
No player, however strong, no member, however large, shall stand above FIDE Florencio Campomanes
Maybe I had something of Capablanca. Why should I prepare when I have ideas? Svetozar Gligoric
1989 NIC

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