First and foremost it is essential to understand the essence, the overall idea of any fashionable variation, and only then include it in one's repertoire. Otherwise the tactical trees will conceal from the player the strategic picture of the wood, in which his orientation will most likely be lost.
Lev PolugaevskyAnalysis, if it is really carried out with a complete concentration of his powers, forms and completes a chess player.
Lev PolugaevskyMy most difficult opponent is myself. When I am playing I often involuntarily make a world champion out of a candidate master.
Lev Polugaevsky