Grandmaster Preparation Positional Play - Jacob AagaardGrandmaster Preparation: Positional Play Jacob Aagaard Improve your Positional decision making Hardback, 312 pages Have there been times during a game when you have tried to calculate like mad, but can find no rhyme or reason to your lines? Have you ever felt that the computer's suggestions in your post mortem analysis make no sense to you? Ever felt like the man with a hammer, suspecting that the world may not be made up entirely of nails after all?