Garry Kasparov was hit on the head with a chessboard. Russian news agencies place the blame on the pro-Putin organization Nashi. He is okay, he just has a bump on his head.
In other news, he talks about the relationship between chess and business, and mentions something that I find strikingly similar to trading stocks:

Chess is a mathematically infinite game. The total number of possible different moves in a single game of chess is more than the number of seconds that have elapsed since the big bang created the universe. Many people don't recognise that. They look at the chessboard and they see 64 squares and 32 pieces and they think that the game is limited. It's not, and even at the highest levels it is impossible to calculate very far out. I can think maybe 15 moves in advance, and that's about as far as any human has gone. Inevitably you reach a point when you've got to navigate by using your imagination and feelings rather than your intellect or logic. At that moment, you are playing with your gut.