Ambush Bishop
There are standard designations in the chess classification of bishops - "good bishop," "bad bishop," "bishop bites on granite" even "good bad bishop." The author understands that although his knowledge of chess literature is quite extensive, outside the narrow circle of his knowledge there is a seamless ocean)). An "ambush" bishop is a sort of a "good bad bishop" (as done, for example, in this http://www.chess-news.ru/node/19016 article). In general, the "good bad bishop" is considered to be a) a bishop that has working diagonals, despite the fact that it is limited by pawns b) a bishop that successfully protects important pawns. On this topic, for example, there is also an article - https://chesspro.ru/_events/2011/dvoretskii8.html (in Russian) and a number of other works. So let's take a look at the bishop species in the next couple of teaching examples and turn to the topic of the article itself.
The bishop d3 is good, the bishop d7 is bad. The d3 bishop is not limited by pawns standing on black fields, the black d7 bishop – is limited by his own pawns and performs modest functions as a defender. However, the situation depends on the turn of the move - if the course of the blacks they are bad, and if the course of the whites there is no way of breakthrough.
The bishop f3 bites on granite (it's strictly limited by the pawn d5, which is protected reliably and it has no prospects). Bishop a6 is a good bad bishop. Black pawns mostly stand on white squares and limit it, but this bishop has its own working diagonal and target (e2), which makes it a very valuable figure.
Now we will pass actually to "an ambush bishop ". So, the ambush bishop, is the bishop bites on granite at its own pawn who bites on granite at the rival's pawn in turn. However, at the same time it has big prospects to play as soon as this pawn moves out from the square. It can't go forward. But it can leave sideways at capture (exchange of figures). Thus, the figure which we will put under exchange on this square will be indirectly protected from exchange by threat of use of strength of the raged ambush bishop. We will review an example - the scheme. The author has already provided game Makht-Petrov in the previous article. https://www.chess.com/blog/Nozdrachev_Vladislav/capture-is-not-needed.
The bishop b7 bites on granite at the pawn e4 (although the queen e3 is the bad blocker). However, after the course of the Nd3, a situation arises that whites will not want to change to d3, since the bishop will open. So the knight on d3 acquires great stability, this is a kind of complex of black figures. In refined form, this idea can be seen in the game of the 1953 Taimanov-Averbach Candidates tournament:
Taking the rook to d6 opens the bishop b2, tormenting the weak black squares of the king side. And if you do not take, white wins the fight for line d.
An exchange can also be non-equivalent. You can cause it by the sacrifice, for example, the exchange. There is a famous example from the game Avery - Gligorich (1971).
However, in the king's Indian defense it is a typical technique, and more often there is still an exchange, and not a sacrifice. For example, an exchange of the knight f4 for some kind of opponent figure (Kamsky - Kasparov, 1992).
This kind of bishop can occur in various debut tabias:
And before moving on to the tasks, I would like to highlight a very important, negative point. The fact is that in the case of an ambush bishop, it is very important to determine whether this bunch of figures can be circumvented in some way and decide the fate of the game in their favor in another section of the battle. It may turn out that the figures will remain suspended and it will not be possible to change the bishop due to the fact that the figure-outpost is in danger. Such a game was recently in the author's blitz with one young talent:
Tasks:
Flohr - Lasker, 1936
