(1):- an unique incident took place at world intetzonal chess tmt in Gotenberg(Swiden) in 1963, in a same day same round incidently three Russian GMs (Spassky.GELLER.Keres) met three Argentine GMs(PILNIK..NAJDORF..PANOV). all Russian playing white..all Argentine GMs employed a home prepared variation in Sicilian/najdorf to shook Russians but all russian wre ready to meet and all russian won in approx. identical move order..A UNIQUE PHINOMINUM AT HIGH LEVEL CHESS !!