According to such great attacking players as Bronstein and Tal, most combinations are inspired by the player's memories of earlier games.
Pal BenkoThe business of the endgame is maneuvring to control critical squares, advancing or blockading passed pawns, preparing a breakthrough by the king, or exploiting the subtle superiority of one piece over another.
Pal BenkoSince your mental state can have such dramatic effects on your body, obviously your physical condition can affect your mental well-being. It follows that regular physical conditioning should be part of your overall chess training.
Pal Benko