It is a profound mistake to imagine mistake to imagine that the art of combination depends only on natural talent, and that it cannot be learned. Every player knows that all (or almost all) combinations arise from a recollection of familiar elements.
Richard RetiThe scheme of a game is played on positional lines; the decision of it, as a rule, is effected by combinations.
Richard RetiThe essential disadvantage of the isolated pawn ... lies not in the pawn itself, but in the square in front of the pawn.
Richard Reti