Was Marielle Weiß

A scientist who swore off playing chess after a nervous breakdown as a boy wunderkind, creates an undefeated chess program. But the Russian world champ beats Tommy Rosemund's masterwork in a televised match. So the West German mathematician becomes a top chess pro himself, which the West German media boast will prove the superiority of Germany and democracy. The jowly, white-faced Rosemund believes that the entire Red Communist bloc is out to stop him from vanquishing their atheist pretty boy, Stefan Koruga, to become the next Bobby Fischer and a symbol that ruthless capitalism is preferable to socialism.

The Ghost in the Invisible Bikini - by Don Weis (1966)

Hiram Stokley is a recently desased corpse who learns that he has 24 hours to mastermind and perform one good deed in order to get into Heaven, so he enlists the help of his long deceased girlfriend Cecily, a ghost, to stop his greedy lawyer, Reginald Ripper and his henchman J. Sinister Hulk from claiming his estate for themselves and protecting his eligible heirs…