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 KotovAll candidate moves should be identified at once and listed in one's head. This job cannot be done piecemeal, by first examining one move and then look at another.
Alexander KotovExperience and the constant analysis of the most varied positions builds up a store of knowledge in a player's mind enabling him often at a glance to assess this or that position.
Alexander KotovOnce in a Moscow chess club I saw how two first-category players knocked pieces off the board as they were exchanged, so that the pieces fell onto the floor. It was as if they were playing skittles and not chess!
Alexander KotovIn choosing an opening plan players think most of all of harmonious development for the pieces, but sometimes leave the development of the queen out of their considerations. Yet the Queen is the most valuable and important piece and the whole outcome can depend upon how successfully she plays her role.
Alexander Kotov