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

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.

Just as the pianist practices the most complicated pieces to improve the technique of his fingers, so too a grandmaster must keep his vision in trim by daily analysis of positions with sharp possibilities, and this applies whether he prefers such positions in his play or not.

In 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.

Once we have chosen the right formation in the centre we have created opportunities for our pieces and laid the foundation of subsequent victory.

Once upon a time supporters of the Steinitz-Tarrasch school had a very high opinion of a queen-side pawn majority. Modern strategy on the other hand categorically denies that such a majority is an independent factor of any importance.

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