As a rule, pawn endings have a forced character, and they can be worked out conclusively.

Black is now in desperate need of a good idea. Or, to put it standard chess notation, +-

In positions of strategic manoeuvring (where time is not of decisive importance) seek the worst-placed piece. Activating that piece is often the most reliable way of improving your position as a whole.

It is not possible to become a great player without having learned how to analyse deeply and accurately.

It is very important to learn to weigh up objectively (or assess intuitively) the totality of the competitive and psychological factors.

I do not know to whom the aphorism 'There are no sound studies, only ones that haven't been busted yet' belongs, but it has measure of truth in it.

Emotional instability can be one of the factors giving rise to a failure by chess players in important duels. Under the influence of surging emotions (and not necessarily negative ones) we sometimes lose concentration and stop objectively evaluating the events that are taking place on the board.