The masters and grandmasters can be divided into three groups - the inveterate time trouble merchants, those who sometimes get into trouble, and those for whom the phenomenon is a very rare occurence.
Alexander KotovThe main thing that develops positional judgement, that perfects it and makes it many-sided, is detailed analytical work, sensible tournament practice, a self-critical attitude to your games and a rooting out of all the defects in your play.
Alexander KotovIf a chess statistician were to try and satisfy his curiousity over which stage of the game proved decisive in the majority of cases, he would certainly come to the conclusion that it is the middlegame that provides the most decisive stage.
Alexander Kotov