I can get quite philosophical about chess. Here's a gist.
Take the pawn, for example, the weakest chess piece on the board. He possesses the courage to charge forward into battle without so much as a sword against the entire army - an ant in a windstorm - backed up with only one or two of his friends. Once he proves his determination and courage, he becomes greater than all the other chess pieces (except the king, of course, but still impressive). Even if he doesn't succeed, he dies with honour having fought faithfully for his king.
Now take a look at the queen. The most powerful piece on the chessboard, every other piece cowers in fear from her might. However, she soon finds out that even the most powerful piece on the chessboard cannot sail through every storm alone, especially when they get intense. Nevertheless, her love for her husband gives her the courage to die for his life, and to even transcend death.
Now observe the rooks. They make great fighting pairs. Their harmonious movements with each other, as well as with the other pieces and the entire board, always brings victory for them. They would also die for their king at any cost; at least one stands right by the king's side.
Likewise for the bishops, they make a harmonious pair. Both of them have their strengths which cover each other's weaknesses, just as one's skills cover another's flaws. Once seperated, they cannot last long in the storm of life.
That is some good stuff by roi, musical and Stephen. You could have a chess game and a fight with cancer playing out simultaneously.
Your phrase, "cancer that loves chess" seems a little irregular though.