Wolfgang Unzicker vs Francisco Jose Perez Perez
EUR-chT (Men) 2nd Oberhausen FRG round 9 1961.06.30
Sicilian Defense: Richter-Rauzer Variation, Neo-Modern Variation, Nyezhmetdinov Attack 1/2-1/2
https://www.chessgames.com/perl/chessgame?gid=1973565
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