the bizarre Return from the Ashes...in which he played a murderous chess master.
We seem to have come across that murder/chess theme before, haven't we? In this particular version, the chessplayer-murder, Schell, manages to kill Samantha Eggar but not, despite his best efforts, Ingrid Thulin, with whom he earlier makes a marriage of convenience after they meet over a chessboard.
Obviously the moral of the story is "never marry a chessplayer", or indeed have anything to do with one.
Here's Thulin playing chess with Schell.
You can watch the whole thing on YouTube if you click in the right places. I've not actually found time to do this, but I did see the first section of the film, leading up to Thulin's first encounter with Schell. You may be momentarily startled just after the eight minute mark.