This movie is being shown on TV Sunday morning. I don't know of another movie that is so gambling-related, w/ many casino scenes, different games. Virtually every scene and dialog is about gambling. Ava Gardner looked quite nice in the movie. A little depressing, it got good reviews, is quite lavish -- scenes of 19th century posh casinos.
If you see it, I think it better not to read reviews beforehand. Here is a link to the TV movie review:

http://www.tvguide.com/movies/great-sinner/review/125127

It got 3-1/2 stars out of 4. Review began as follows:

"In this often gripping film based on Dostoyevsky's 1866 story "The Gambler" (uncredited by the producers here), Peck is an honorable writer who falls in love with Gardner, but learns that her father (Huston), an inveterate gambler, is horribly in debt to casino owner Douglas and that father and daughter are almost chattel to the smooth gambling czar. Peck plans to rescue the pair and redeem their IOUs by beating Douglas at his own gaming tables. At first, it appears as though he will be able to accomplish the impossible. He wins and wins, his beginner's luck triumphing with every turn of the cards, roll of the dice, and spin of the wheel. Magnanimously, Peck begins to repay Huston's debt to Douglas, who takes it all smugly, knowing .... ..... ....."

The Great Sinner (1949)
82 TCM: Sunday, August 3 6:00 AM
1949, NR, **1/2, 01:50, B & W, English, United States,

A lucky writer (Gregory Peck) tries to get his girlfriend (Ava Gardner) and her gambler father out of debt to a casino owner (Melvyn Douglas).

Cast: Gregory Peck, Ava Gardner, Melvyn Douglas, Walter Huston, Ethel Barrymore, Frank Morgan, Agnes Moorehead, Ludwig Stossel, Ludwig Donath, Erno Verebes, Curt Bois, Martin Garralaga Director(s): Robert Siodmak Producer(s): Gottfried Reinhardt

Robert