Positional Chess

Positional chess is an approach to the game which finds the piece located in the weakest position and moves it to a stronger square. Sometimes this is also named "Fischer's rule," as Bobby Fischer played in a style that minimized weak positional pieces, though he never expressly stated that this was his approach.

Mark Dvoretsky, a prominent Soviet chess coach, called this is "the principle of the worst piece."

Gary Kasparov calls it "Tarrasch's dictum," and illustrates it with how General Electric CEO Jack Welch would tell the directors of his worst divisions to improve their profitability or be shut down.