 Complete the following phrase:  FIDE found itself embroiled in some controversies relating to the American player Bobby Fischer, the first of which took place when Fischer alleged that at the 1962 Candidates Tournament in Curaçao, the Soviet players Tigran Petrosian, Paul Keres and Efim Geller had pre-arranged draws in their games played amongst themselves, and that Viktor Korchnoi, another Soviet player, had been instructed to lose to them Fischer had 