Chess sharpens the mind, stimulates concentration, improves the memory and promotes visualization.
Good players develop a tactical instinct, a sense of what is possible or likely and what is not worth calculating.
Young players calculate everything, a requirement of their relative inexperience.
The only good Rook is a working Rook!
My style is somewhere between that of Tal and Petrosian
It often happens that a player is so fond of his advantageous position that he is reluctant to transpose to a winning endgame.