I think that's a big stretch.
Game doesn't mean gambling to me. And neither does chess. I'm deciphering the xoxoxox's posts as clues to a bigger, behind-the-scenes intrigue.
But I'm certainly open to anyone's interpretation.
Seems to me, xoxoxox is suggesting that this man is Crystal's grandfather.
http://www.senate.gov/artandhistory/history/common/generic/Featured_Bio_Mangum.htm