in chess tournaments the a win is 1 pts, a lost match gets you 0 pts, but a draw gives both players 0.5 pts. so by giving each others draws after a "hard match" (you offer a handshake and if the other accept the hand it's a draw) you can artificially help and boost an opponent's score. bobby fischer accused kasparov (ussr) of doing this, and when kasparov fought vs the computer deep blue he saw the matchs and he found kasparov to be a bad and weak player (he lost vs deep blue) and i assume many other grand masters thought the same. so he probably was right all along, he was just too smart to be believed.
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