Solitaire and solitude do have the same root, so I suppose this could meet the challenge. I don't really feel solitude when viewing this image, but that's probably just me. I like the way you've cropped this.
I like the symbolism in this shot - I can see it easily being played by a lonely or bored person. The lighting is good as is the focus. Fits the challenge well, but overall my interest isn't kept by the image. Works on most levels though. 6
Makes me want a black 6 so I can move that 5-4-3-2....did you win this game? =)
Nice shot, though I think the white table doesn't quite contrast enough with the white on the cards.