Ratmir Kholmov vs Yury Isakovich Kots
URS-ch sf Sverdlovsk URS round 15 1957.12.03
Ruy Lopez: Closed, Breyer 1/2-1/2

Yury Isakovich Kots vs Boris Spassky
USSR Championship 1961b Baku URS round 1 1961.11.17
Ruy Lopez: Closed, Averbakh Variation 0-1