Sometimes to win you must lose something ... and one who wins from a losing position is called a gambler. I think chess and gambling are deeply related. It's also gambling when you intent to play black. I don't know the statistical correlation between chess ratings and gambler ratings, however i feel that deep chess players are also deep gamblers.
There are openings literally called "Gambits" where you give up a small amount of material (a pawn or minor piece) to try to win big...
Chess can be seen as a competition of skill rather than chance or luck, but let's not forget the idea of betting on games that also require some preparation and analytics.
And speaking of other games of chance, for example, about poker, so even more skills are needed there and luck will already help much less.
[removed -- MS]Ultimately, the interplay between strategy, preparation and opportunity to bet adds depth to the comparison between these two seemingly different activities.