In analysing complicated variations one must examine each branch of the tree once and once only.

Sit there for five hours? Certainly not! A player must walk about between moves, it helps his thinking.

The rise of the Soviet school to the summit of world chess is a logical result of socialist cultural development.

The study of typical plans is something that the leading grandmasters devote a great deal of time to. I would say that the most far-seeing of them devote as much time to this as to the study of openings.

All 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.

Here is a definition which correctly reflects the course of thought and action of a grandmaster: - The plan in a game of chess is the sum total of successive strategical operations which are each carried out according to separate ideas arising from the demands of the position.

When you have finished analyzing all the variations and gone along all the branches of the tree of analysis you must first of all write the move down on your score sheet, before you play it.