Learn From Mark Dvoretsky – Part Six – The “Trunk”

The “Trunk”

The following exercise is taken from chapter two of Dvoretsky’s Analytical Manual.

This is what Dvoretsky had to say about this chapter:

From our search for brilliant combinations, we turn to the more prosaic, though no less important issue: calculating combinations accurately.

In his book Think Like a Grandmaster, Alexander Kotov introduced the concept of a “tree of variations”, that being the collection of variations which needs to be analyzed. He also enumerated three kinds of “trees” – the “bare trunk”, the “shrub”, and “variational debris.” In this and the chapters that follow, we will be looking at examples of each kind of tree.

The “bare trunk” is a long, forcing variation practically devoid of alternatives. (In point of fact, there are almost always alternatives; but if they are of little significance, we can honestly assign our calculations this kind of label.)

For less highly-skilled players, the main impediment is the need to accurately foresee each of the many positions that come up over the course of calculation. Over a lengthy calculation, they are prone to lose the threat, and find themselves unable to continue the variation.

But for trained chessplayers, too, there are difficulties – above all, psychological ones. The deeper one goes into the variation, the stronger grow the doubts: should I extend this line? Did I calculate everything corectly? Did I overlook something important?
You can increase your confidence in your calculating by moving down the line without haste, stopping at each step to check carefully whether or not there might be a strong alternative, either for yourself or your opponent.

Exercise 1

The game position is taken from Spragget – Browne, New York, 1987. Your task is to evaluate 32 Bxa5.

Even with the question phrased this way, focusing on analyzing one concrete continuation, it is still necessary to think, if only for a little while, about the starting position: who is better, and what will happen if White plays a quiet move.

For if White stands better, then we will not be satisfied if, for example, the sharp variation that we must calculate ends in a draw. We would also be justified in cutting our analysis short if we see that it would lead to a situation that would be difficult to evaluate, and involve considerable risk.
On the other hand, these circumstances do not require us to just give up on the main continuation, if we assess the starting position in our opponent’s favor.

Exercise 2

Evaluate the consequences of the bishop sacrifice on g6.

Exercise 3

Evaluate the consequence of sacrifice on g5!

Solution 1

Solution – Exercise 1 – extension

Solution – Exercise 2

Solution – Exercise 3

Learn From Mark Dvoretsky – Part Five – The “Shrub”

The “Shrub”

The following exercise is taken from chapter four of Dvoretsky’s Analytical Manual.

In this chapter, the reader’s goal is trying to find the best Candidate moves for the Black side of the two positions. The positions and the solutions are given below.

Position 1

Analysis – Part One

Position two

Analysis – Part two

Play like Garry Kasparov – Part Three – Kasparov – Privorotsky, Baku 1974

Kasparov – Privorotsky, 1974

The following game was played by 12 year old Garry Kasparov in the Bakiu team tournament back in 1974.

His opponent, Oleg Privorotsky, was strong Baku master and one of his trainers at that moment. Thus, the game is interesting not only from the competetive, but also from psychological point of view.

The variations are taken from Kasparov’s book – Garry Kasparov on Garry Kasparov, Part One, 1973-1985.

Continue reading “Play like Garry Kasparov – Part Three – Kasparov – Privorotsky, Baku 1974”

Learn From Mark Dvoretsky – Part Four – Combinative Fireworks

Combinative Fireworks

The following exercise is chapter one from the famous book, Dvoretsky’s Analytical Manual.

This is what Dvoretsky had to say about this position:

Continue reading “Learn From Mark Dvoretsky – Part Four – Combinative Fireworks”

Play like Garry Kasparov – Part Two – Karpov – Kasparov, 1985.

Karpov – Kasparov, 1985.

In today’s post, we are going to examine three positions from the 2nd game from the 2nd match between Garry Kasparov and Anatoly Karpov.

In this sharp Sicilian encounter, Kasparov, playing the Black pieces, suffered a bit after a mistake opening, but then Karpov returned the favour and made a passive move which allowed Kasparov to grab the initiative in his typical manner.

In the end, Kasparov didn’t convert his advantage though, but his play in the middlegame was extremely strong and impressive.

The variations are taken from the book Kasparov vs Karpov, 1975-1985.

Good luck!

Continue reading “Play like Garry Kasparov – Part Two – Karpov – Kasparov, 1985.”