Director: Richard Donner
Writer: Alan Caillou
Synopsis: Taking its title from the classic chess gambit, this episode is a sequel to The Quadripartite Affair. Since Gervaise Ravel (Anne Francis) had evaded capture in the earlier episode, Solo and Kuryakin devise a scheme to lure her into a trap. Jill Ireland (Marion Raven) and John Van Dreelen (Harold Bufferton) also return. Director Richard Donner, producer Sam Rolfe, associate producer Joseph Calvelli and executive producer Norman Felton have cameos during a party scene.*
Let's face it, they look like they are about to come to blows over Illya, who is blissfully unaware of either of them.
The best thing about this episode were the party scenes and, of course, the lovely Anne Frances, who really stole the show. Jill Ireland's acting was up (down?) to its usual standards. However, if you ignored her, the rest was pretty good.
* wikipedia
** from Lisa's Frame captures