Objectivity and presence of mind are essential in such positions where sacrificial temptations are not always resistable.

The proper timing of an attacking plan is a difficult matter which places great strain on a player's nerves. Mastery of this art is required for success in the international arena, but perfect mastery eludes even the very best chessplayers!

A great chess player always has a very good memory.

Lack of proper endgame technique allows many players to escape from lost positions, even without any spectacular play on their part.

Objectivity and presence of mind are essential in such positions where sacrificial temptations are not always resistable.

A real sacrifice involves a radical change in the character of a game which cannot be effected without foresight, fantasy, and the willingness to risk.

In modern praxis lost positions are salvaged most often when the play is highly complicated with many sharp dynamic variations to be calculated.