Did you ever get conned by a guy who challenges you with 2 games black and white and reponds with your moves to you.Well I thought that was so when a guy played e4 in response to my e4 in a game I replied e6 watching whether he might repeat it in the other game he didnt .We had a good laugh over that later.Well I read this in a Sydney Sheldon in which a girl draws with 2 GMs using this trick LOL.
then their goal, of getting two draws, doesn't succeed...
Not actually, of course, because EVENTUALLY it will (or one win and one loss) -- but they don't know that. The point is that the GM will trick them into thinking they've met their goal of getting two draws by claiming one game is drawn, but not sticking to that claim in the other.