Modern Chess 2

The second part of the IQP survey features two beautiful games annotated again by the prominent player and coach Viktor Gavrikov for "Modern Chess."

[Event "Pecs-A"]
[Site "Pecs"]
[Date "1976.09.??"]
[Round "?"]
[White "Honfi, Karoly"]
[Black "Dorfman, Josif D"]
[Result "1-0"]
[ECO "D42"]
[WhiteElo "2460"]
[BlackElo "2405"]
[Annotator "GM Viktor Gavrikov"]
[PlyCount "63"]
[EventDate "1976.09.20"]
[EventRounds "11"]
[EventCountry "HUN"]
[EventCategory "6"]

{Dear readers, In the present issue of "Modern Chess", we continue to examine
the positions with "isolani". The first artcile of the course was designed to
deal with three of the most important attacking possibilities in such
positions - rook transfer to the kingside, knight sacrifice on "f7" square and
pushing of the isolated pawn. In this article, I am going to bring to your
attention another three fundamental attacking ideas for the side which plays
with an isolated queen's pawn - transition into symmetrical pawn structure,
advance of the "f" pawn and advance of the "h" pawn. 1) Transition into
symmetrical pawn structure The transition into symmetrical pawn structure is a
topic, the importance of which is often underestimated in the chess
litterature. Such transition can arise in positions where the piece which
blockades the isolated pawn is exchanged. When we play a position with an
"isolani", the possibility of transition into symmetrical pawn structure after
an exchange on "d5" ( "d4" ) is always in the air and we should consider it in
every moment. That's why we are obliged to examine a new pawn structure, even
though it doesn't seem to have anything in common with the isolated pawn.
Under what circumstances we should give preference to the symmetrical pawn
structure? That is the question I am most often confronted to, when explaining
the present topic to my students. Despite of the fact that the answer is
rather complex, I will point out some general directions. Those of you who
have read the first article of the course know that when we play with an
isolated pawn, our long-term plan is to launch a kingside attack. According to
the basic chess principles, side attacks are successful when the situation in
the center is stable. In the same line of thoughts, the transition into
symmetrical pawn structure favours the side which is planning to attack the
opponent's king. On the other hand, in positions with symmetrical pawn
structure, our typical space advantage doesn't exist anymore. Moreover, there
are is no pressure on the "e" file. In order to use the advantages of the
symmetrical pawn structure, we shoul be ahead in the developpement and our
pieces must be more active. Only in these cases, we can organize a strong
kingside attack which compensates the fact that the space advantage is lost.
Also, it's important to mention that the transposition to symmetrical pawn
structure is generally favourable when the opponent's kingside is weakened.
The abovementioned ideas are brilliantly illustrated by the game Honfi -
Dorfman played in 1976. Let's take a look at that instructive game. The
position we are interested in arises after the moves:} 1. c4 c6 2. e4 d5 3.
exd5 cxd5 4. cxd5 Nf6 5. Nc3 Nxd5 6. Nf3 e6 7. d4 Nc6 8. Bd3 Be7 9. O-O O-O 10.
Re1 {[%csl Re5,Re6,Re7,Re8][%cal Gf1e1] Diagram [#] Diagram [#] The diagram
position is extremely popular and can arise from many opening variations. As
an example, we can point out Panov attack in Caro-Kann defence, Semi-Tarrasch
defence, Alapin variation in Sicilian defence and etc. That's why the deep
understanding of that position helps us to improve our opening repertoire.} Bf6
{The idea of Black's last move is to free the "e7" square for the knight.
Afterwards, black is planning to strengthen the control over the key "d5"
square by playing moves like b6 and Bb7 or even Bd7 - c6. In general, one of
the main problems for Black consists in finding a suitable square for the "c6"
knight. Even though Black has managed to solve the abovementionned problem,
his last move has one very imporant negative side. When there are is no knight
on "f6" square, the "h7" pawn becomes a target in many variations.} ({A
popular alternative is} 10... Nf6 {[%cal Gc6b4,Gb4d5,Gb7b6,Gc8b7] Diagram [#]
Now the kingside is well protected but the "c6" knight has no good squares.
Given the fact that Black's only constructive idea is connected with the
manoeuvre Nb4 - d5, white must play} 11. a3 {[%cal Gd3c2,Gd1d3] Diagram [#]
followed by Q-B attacking set up along the "b1 - h7"diagonal.}) 11. Be4 $1 {
Diagram [#] Very interesting move. In favourable circumstances, White is ready
to enter in a position with a symmetrical pawn structure. In the diagram
position, the positional threat is 12.Qd3 with the idea to provoke weaknesses
on the kingside. As we already know, the weakened kingside is a sign that a
possible transition into a symmetrical pawn structure could be advantageous.}
Nce7 12. a3 Bd7 {Diagram [#] Diagram [#] A doubtful move. Despite of Black's
intention to increase the control over the critical "d5"square by means of 13..
.Bc6, white has some additional possibilities connected with an eventual
transition into a symmetrical pawn structure.} ({It was preferable to continue
with} 12... b6 {[%cal Gc8b7] Now, in any moment, Black is ready to recapture
on "d5" with a piece.}) 13. Qd3 g6 {The most typical reaction in response to
the attack against the "h7" pawn. As we have already pointed out in the first
article of our present course, Black is not advised to play the move h7-h6.
This move not only weakens the "b1 - h7" diagonal, but at the same time bishop
sacrifices on "h6" are always in the air.} 14. Bh6 Bg7 {As a rule, in such
kind of positions, the exchange of the black-squared bishops is in White's
favour. The weak dark squares on the kingside make the tranisition into
symmetrical pawn structure extremely tempting.} ({Better was} 14... Re8 {
In this position, white should probably go for the plan conected with the
advance of the "h"pawn.}) 15. Bxg7 Kxg7 {Diagram [#] Diagram [#]} 16. Bxd5 $1 {
Just in the right moment! This exchange is necessary, because everything is
ready for the change of the structure - White is ahead in development and
their pieces are more active, whereas the Black's kindside is very weak.} Nxd5
17. Nxd5 exd5 18. Qb3 Bc6 {[%csl Yc6,Gf3] Diagram [#] Diagram [#] A typical
middlegame position has arised. White can already claim a clear advantage.
Their knight dominates Black's bishop which is restricted by his own pawns. In
adition, we should mention that White's plan is extremely clear - after
putting his knight on the important "e5" square, white can proceed with
doubling his rooks along the "e" file. Later, the queen must be transferred to
the kingside with the idea to execute the typical h2-h4-h5 pawn advance. At
the same time, black is doomed to passivity.} 19. Re3 Qd6 20. Rae1 a5 21. Ne5
a4 22. Qd1 Bd7 $6 {[%csl Rg7] Diagram [#] Diagram [#] Black's idea is to
relocate the bishop, but they waste too much time.} ({Maybe it was better to
play} 22... Rfe8 {, but even in that case, white can proceed with his initial
plan.}) 23. h4 Bf5 24. h5 $1 {[%csl Yg7] Diagram [#] When White's pawn reaches
the "h5" squre, Black's king is always in potential danger. Now only the queen
must enter the attack.} Qb6 25. Qd2 {Diagram [#] The "d2" square is very
suitable for White's queen. From here, the queen not only protects "b2" and
"d4" pawns, but at the same time is ready to use the weak dark squares in
Black's camp. A possible idea is the advance g2-g4 followed by Rh3, h:g6 and
Qh6.} f6 $2 {Diagram [#] Mistake in a difficult position.} 26. Nd7 $5 {The
right idea is executed in a wrong way. Now, with a precise play, Black can
enter a Queen endgame where he is only a pawn down.} ({White should have
played the precise} 26. Ng4 $1 {[%csl Yg7,Rh6][%cal Rd2h6,Re3e7] Diagram [#]
Diagram [#] In this position, we should consider the following forced sequence:
} Bxg4 (26... g5 $2 27. Re7+ Kh8 28. Nh6 $18) (26... Rf7 $2 27. Re8 $18) 27.
Re7+ Rf7 28. Rxf7+ Kxf7 29. Qh6 Rg8 30. Qxh7+ Rg7 31. hxg6+ Kf8 32. Qh8+ Rg8
33. Re8+ Kxe8 34. Qxg8+ Kd7 35. Qf7+ Kd6 36. g7 Be6 37. Qxf6 Kc7 38. Qe7+ Kc8
39. g3 Bg8 40. Qe8+ Qd8 41. Qxa4 {Diagram [#] White has four pawns for the
bishop. His position is complitely winning.}) 26... Bxd7 27. Re7+ Rf7 28. Rxf7+
Kxf7 29. Qh6 {Diagram [#]} Rg8 $2 {This move loses on the spot.} ({Only the
tenacious} 29... Re8 30. Qxh7+ Kf8 31. Qh8+ Kf7 32. hxg6+ Kxg6 33. Rxe8 Bxe8
34. Qxe8+ Kh6 {could have left some chances of survival.}) 30. Qxh7+ Rg7 31.
hxg6+ Kf8 32. Qh8+ (32. Qh8+ Rg8 33. g7+ $1 {Diagram [#]} Kf7 34. Qh5+ Kxg7 35.
Re7+ {With a mate to follow.}) 1-0

[Event "Ostend"]
[Site "Ostend"]
[Date "1906.??.??"]
[Round "?"]
[White "Rubinstein, Akiba"]
[Black "Burn, Amos"]
[Result "1-0"]
[ECO "D40"]
[Annotator "GM Viktor Gavrikov"]
[PlyCount "45"]
[EventDate "1906.??.??"]
[EventCountry "BEL"]

{3) The sacrifice of the knight on “f7” The sacrifice on “f7” is the
last attacking idea, which will be discussed in this issue of our magazine. Of
course, that such a blow on black’s position cannot come from nowhere -
there are certain premises. Our readers should remember that the sacrifice on
“f7” is always followed by the gain of the pawn on “e6”. In order to
achieve this scenario, two conditions need to be met: 1) The white
light-squared bishop must be put on the “a2-g8” diagonal; 2) The black
light-squared bishop must have left the “c8-h3” diagonal. To understand
the practical application of the theoretical concepts mentioned above, we
propose to your attention the match between Rubinstein - Burn, played in
Ostend, in 1906. The position that we are interested in arose after the moves:
} 1. d4 d5 2. Nf3 Nf6 3. c4 e6 4. Nc3 Nbd7 5. e3 Be7 6. Bd3 O-O 7. O-O dxc4 8.
Bxc4 c5 9. Qe2 Nb6 10. Bb3 cxd4 11. exd4 Bd7 {Diagram [#] Diagram [#] With his
last move, Black clearly shows the intention to place his light-squared bishop
on the “a8-h1” diagonal. It is obvious that the bishop situated on
“c6”, will place a stable control on the “d5” square. Along with its
advantages, this maneuver hides its own risks. As already mentioned, the
abandonment of the “c8-h3” diagonal weakens the “e6” pawn, which is
under attack by the white bishop on “b3”. This is why Black has to be
extremely careful.} 12. Re1 $1 {[%cal Ge1e8] A great idea of Akiba Rubinstein.
Some of the keenest readers, probably already noticed that as in previous
games, White always places the rook on “d1”. However, the polish chess
virtuoso did not play as usual. Anticipating the future vulnerability of the
“e6” pawn, he decided to the place the heavy pieces on the “e” file.}
Bc6 13. Ne5 $1 {[%csl Re6,Rf7][%cal Re5f7] Diagram [#] Now, at any move, Black
should consider the sacrifice of the knight on “f7”.} Bd5 {Black tries to
neutralize the pressure on the “a2-g8” diagonal. However, the move 13...
Bd5 gives White the opportunity to take the bishop with the knight. In this
situation, Bb3 remained without an opponent and now the sacrifice on “f7”
became even more dangerous. It was better to play 13... Nbd5.} ({The tempting
gain of the pawn} 13... Qxd4 {can be confronted with the thematic sacrifice on
“f7”.} 14. Nxf7 $1 {Diagram [#] Diagram [#]} Rxf7 15. Qxe6 Bd5 (15... Nbd5
$6 16. Be3 Qb4 17. Nxd5 Nxd5 18. Bxd5 Bxd5 19. Qxd5 $16) 16. Nxd5 Nbxd5 (16...
Nfxd5 $2 17. Be3 $18) 17. Be3 Qxb2 18. Rab1 Qa3 19. Bxd5 Nxd5 20. Qxd5 Rd8 21.
Qxb7 Qxa2 22. Qxa7 Qxa7 23. Bxa7 Bb4 24. Rxb4 Rxa7 {Diagram [#] Diagram [#]
Although this position looks to be equal, Black has to work hard in order to
get a draw.}) 14. Nxd5 Nbxd5 {Black took with the right knight. It is
necessary to notice that in this kind of position with an isolated pawn, the
removal of the “Nf6” from the kingside usually portends problems.} ({
Here is one of the variations:} 14... Nfxd5 15. Qg4 {A typical move. From the
“g4” square, the queen not only opposes the black king, but also
intensifies the pressure on the “e6” pawn. Now, is already too late for
the black knight to come back on “f6”:} Nf6 $2 16. Nxf7 $1 {[%csl Rf7,Yg8]
Diagram [#] Diagram [#]} Rxf7 (16... Nxg4 17. Nxd8 $16 {[%cal Gb3e6]}) 17. Qxe6
Nfd5 (17... Nbd5 18. Re5 $16) 18. Re5 $16) 15. Bg5 Rc8 $2 {Diagram [#] Diagram
[#] A very serious mistake, Burn completely ignores white’s tactical threats.
} ({If the white’s next move was predictable, it is more likely that Black
should have defended the pawn on “e6”, by playing} 15... Qd6) 16. Bxf6 $1 {
A known rule - if you exchange one of the interconnected knight, the other one
losses its resistance. Now, at any black’s move, White sacrifices on
“f7”.} Bxf6 {Diagram [#]} (16... Nxf6 $2 17. Nxf7 $1) (16... gxf6 $2 17.
Qg4+ Kh8 18. Nxf7+ $1 Rxf7 19. Qxe6 Rf8 20. Bxd5) 17. Nxf7 $1 {[%csl Rf7]
Diagram [#] The logical conclusion of the Rubinstein’s strategy. The
pressure on the “a2-g8” diagonal is crashing.} Rxf7 18. Qxe6 Bxd4 19. Bxd5
Bxf2+ 20. Kh1 Qf8 21. Rf1 Rc2 22. Rac1 Rxc1 23. Rxc1 {[%csl Rc8,Rf7,Rf8,Rg8]
[%cal Gc1c8,Rd5g8] Diagram [#]} 1-0

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Modern Chess 1

I am glad to present a new chess product, made of my good friends!
“Modern chess” is a magazine of educational type, publishing Grandmaster’s lectures concerning all the stages of the chess game – opening, middlegame and endgame. The articles are interrelated, each one of them being a part of a comprehensive course on a specific topic. Besides the opportunity to read the magazine in PDF, you are offered an interactive version, accessible from the web site.
Therefore, “Modern chess” is a digital educational platform, suitable for anyone who has the ambition to improve his knowledge on the chess game. For more information about Modern Chess Magazine, please visit: http://www.modern-chess.com/en/modern-chess-magazine
I am happy to publish a complete article by GM Gavrikov about the isolated pawn in four parts. Here are the first two games:

[Event "URS-ch sf"]
[Site "Sverdlovsk"]
[Date "1957.??.??"]
[Round "15"]
[White "Polugaevsky, Lev"]
[Black "Lutikov, Anatoly S"]
[Result "1-0"]
[ECO "D37"]
[Annotator "GM Viktor Gavrikov"]
[PlyCount "57"]
[EventDate "1957.??.??"]
[EventRounds "19"]
[EventCountry "URS"]

{The attack with an isolated pawn - GM Viktor Gavrikov Dear chess friends,
this article marks the beginning of a training course designed to acquaint the
readers of the magazine "Modern Chess" with one of the most important type of
positions in middlegame - isolated pawn. The importance of this topic is
related to the fact that it can arise from a huge number of openings. Several
examples are Queen’s Gambit, Slav Defense, Tarrasch Defense, New Indian
Defense, Nimzowitsch Defense, Sicilian Defense and many other openings.
Therefore, good knowledge of these positions is necessary for any chess player,
regardless of his repertoire. Our magazine provides a full course of study on
the isolated pawn, which contains three logically linked articles. The first
two published materials focus on the methods of playing with an isolator. This
article will explain in depth the three most important attacking ideas for the
side playing with an isolator, which are - the transfer of the rook on third
horizontal, the movement of the isolated pawn and the sacrifice of the knight
on “f7”. No less important are the techniques, which will we discussed in
the second article of our series - the switch to a symmetric pawn structure
after the exchange on “d5”, the movement of “f” pawn and the movement
of “h” pawn. Once our readers are familiar with the offensive potential of
the isolated pawn, they can move forward to the closing article of the course,
which stresses the methods of playing against such a pawn. 1) The transfer of
the rook on third horizontal For a better understanding of this maneuver, it
is necessary to make some general clarifications. The main advantage of the
isolated pawn is that it provides spatial advantage. While the isolator
controls the “e5” and “c5” squares (respectively “e4” and “c4”)
, they can be perfect outpost for the knights. Another essential advantage is
the possession of the semi-opened line “e” which is often used as a
springboard for the development of an attack against the enemy’s king.
Taking into consideration the above-mentioned advantages, the side playing
with an isolated pawn should seek for attack on the kingside and avoid pieces
exchange. The readers should know that in endgame such a pawn is a weakness
rather than a strength. One of the classic methods of attack is the transfer
of the rook on the kingside. This is maneuver is possible, due to the spatial
advantage, provided by the isolated pawn. We can say that quite often the
isolator acts as a “screen”, behind which the regrouping of the pieces is
performed, aiming to play offensive against the king. A relevant example,
which fully illustrates the idea of the transfer of the rook on the third
horizontal, is the classical game between the two Russian Grandmasters, Lev
Polugaevsky and Anatoli Lutikov, played back in 1957.} 1. d4 Nf6 2. c4 e6 3.
Nf3 c5 4. e3 Be7 5. Nc3 O-O 6. Bd3 ({Deserves attention move d4-d5, which
leads to Benoni’s pawn structure, favorable for white:} 6. d5 exd5 7. cxd5 d6
8. e4 $14 {The White’s advantage is due to the fact that the “e7” square
is not suitable for the bishop - in this types of structures the best place is
on the big diagonal.}) 6... d5 7. O-O dxc4 8. Bxc4 Nbd7 {[%cal Ga7a6,Gb7b5,
Gc8b7,Gd8b6,Ga8c8,Gf8d8] Diagram [#] Diagram [#] Very crucial moment! When
Black develops the knight on “d7”, they seek for harmonious development of
the queenside. Their plan includes moves а7-а6, b7-b5, Bb7, Qb6, Rac8 и
Rfd8. However, the early development of the knight on “d7” is premature,
because White can oppose a7-a6 with a2-a4. In that situation, the black knight
will be far from the weakened square “b4”.} ({Therefore, the modern theory
recommends starting with} 8... a6 {[%cal Gb7b5] which aims to cause a2-a4 and
thus weaken the square “b4”. The difference here is that the black knight
is still on “b8” and may move easily to “b4”, from where it does not
only control the “d5” square, but also prevents offensive ideas of white
queen - bishop battery on the “b1- h7” diagonal and the transfer of the
rook on the third line through “d3”.} 9. a4 Nc6 {[%csl Rb4][%cal Gc5d4,
Ge3d4,Gc6b4] Diagram [#] Diagram [#]}) 9. Qe2 {A typical move for queen’s
structure It is obvious that soon enough this will lead to a position with an
isolated pawn and White will start to place its pieces on the best places. The
queen occupied the “e” line, which will become semi-opened after the pawn
exchange, while the rook should be placed on “d1”, where it will create a
dangerous confrontation against black queen.} a6 10. a4 cxd4 11. exd4 Nb6 12.
Bb3 {the best place for the bishop in this kind of positions. The control of
the “d5” square is crucial, when the black knight is on “b6”.} Bd7 13.
Ne5 {Diagram [#]} Be8 $2 {[%csl Ye8,Rf8][%cal Rf8e8] Diagram [#] Very
instructive mistake. The bishop on “e8” disturbs the coordination between
the heavy black pieces and limits the movement of the rook from “f8”.} ({
Black should prefer the following option:} 13... Bc6 14. Nxc6 bxc6 {Diagram [#]
The position that occurred is very interesting and popular, but very often was
incorrectly evaluated. The “c6” + “e6” structure, against “d4” is
called “saw”. It is important to know that this type of structure is
favorable for Black, only if the light-squared bishop is not on “c8”,
otherwise it will become the prisoner of his own pawns. Black also possess the
semi-opened line “b”, which fully compensates white’s couple of bishops.
A very interesting and difficult game to follow.}) 14. Rd1 Nbd5 {Diagram [#]}
15. Rd3 $1 {[%cal Gd3g3,Gg3h3] Diagram [#] White chose the best moment to
transfer the rook on the kingside. It depends on the position where the rook
should be placed, on “g3” or “h3”.} Rc8 16. Rg3 $1 {An important
moment from a practical point of view. When we transfer the rook on the third
horizontal in positions with isolated pawn, it is necessary to choose the
square from which the rook confronts the black king. White threatens Bh6.} Kh8
17. Bg5 Nb4 18. Rd1 {After this move all white pieces are in play. Now it is
time to trigger an attack on the kingside.} Rc7 19. Rh3 $1 {Diagram [#] It is
good to pay attention that the white took is seeking for confrontation against
black king. A real storm will start soon on the kingside!} g6 {With his last
move, Black caused irreparable weaknesses around his king. However, it should
be noticed that it is not easy to find a better move.} ({Obviously,} 19... Kg8
{stumbles across a typical move for this type of position} 20. Ne4 {Diagram [#]
White’s idea is more than logical. He seeks for the exchange of Nf6, which
is the only defender on the kingside. Here is how it could develop:} Nbd5 21.
Nxf6+ Nxf6 22. Qd3 h6 $140 ({After} 22... g6 23. Bh6 {Black rook is blocked.})
23. Bxh6 $1 gxh6 24. Qe3 $18 {Diagram [#] Checkmate is inevitable.}) 20. Qf3 $1
{[%csl Rf6] Diagram [#] Diagram [#] White not only highlights the unstable
position of the knight on “f6”, but also prepares the breakthrough d4-d5.}
Rg8 $2 {A serious mistake in a very hard position.} ({Did not save} 20... Bc6 {
because of} 21. Qe3 {[%cal Gg5f6,Ge3h6] After the exchange on “f6”, the
white queen moves to the “h6” square.}) 21. Ne4 {Undoubtedly the most
natural move. White, however, miss the more elegant and quick win.} ({White
could choose also} 21. d5 $1 {Diagram [#]} exd5 22. Nxd5 Nbxd5 23. Rxd5 $1 Nxd5
$140 24. Rxh7+ $1 Kxh7 25. Qh3+ Kg7 26. Qh6# {Diagram [#] Diagram [#]
Picturesque position!}) 21... Nh5 {Black tries to close the “h” line, but
now the “f7” became exclusively weak.} (21... Nxe4 $2 22. Rxh7+ $1 Kxh7 23.
Qh3+ Kg7 24. Qh6#) 22. Qxf7 $1 {[%csl Rh8] Diagram [#] Diagram [#] The last
shot! Black’s position is falling apart. The rest does not need any comments.
} Bc6 (22... Bxf7 23. Nxf7+ Kg7 24. Nxd8 Rxd8 25. g4 Nf6 26. Bh6+ Kh8 27. Ng5
$18) (22... Bxg5 23. Nxg5 $18) 23. Qxe6 Rg7 24. d5 Bd7 25. Bxe7 Rxe7 26. Qd6
Qe8 27. Nf6 Nxf6 28. Qxf6+ Rg7 29. d6 {Diagram [#]} 1-0

[Event "Biel Interzonal"]
[Site "Biel"]
[Date "1976.08.04"]
[Round "18"]
[White "Portisch, Lajos"]
[Black "Sosonko, Gennadi"]
[Result "1-0"]
[ECO "E57"]
[WhiteElo "2625"]
[BlackElo "2505"]
[Annotator "GM Viktor Gavrikov"]
[PlyCount "49"]
[EventDate "1976.07.??"]
[EventRounds "19"]
[EventCountry "SUI"]
[EventCategory "12"]

{2) The movement of the isolated pawn Considering the spatial advantage and
the reference squares, the isolated pawn provides many other dynamic
possibilities, linked to the movement of the isolator. Here is crucial to ask
a basic question, the answer to which confuses even the experienced chess
players: In which circumstances is necessary to push the isolated pawn?
Although the answer to this question is not obvious, we will try to give a
general rule, easy to understand for everybody: The isolated pawn should be
moved forward, when the side playing with it has development advantage. This
rule is based on the fact that the player, whose pieces are better developed,
seeks to open the position and seize the initiative. Despite this, there are
positions in which the isolated pawn is a weakness and the side playing with
it tries to get rid of it, while pushing. This is usually happening in the
endgame. Now, we would like to give you an example of a game, played by one of
the greatest Hungarian theoretician Lajos Portish.} 1. d4 Nf6 2. c4 e6 3. Nc3
Bb4 4. e3 O-O 5. Bd3 d5 6. Nf3 c5 7. O-O cxd4 8. exd4 dxc4 9. Bxc4 b6 10. Bg5
Bb7 11. Re1 Nc6 {Diagram [#] Diagram [#] This is one of the most popular
position in Rubinstein system in Nimzo-Indian defense. By placing the knight
on “c6”, Black seeks to place pressure on the isolated pawn. However, the
knight is not very well placed on “c6”, because the black’s
light-squared bishop cannot control the “d5” square. All these facts
contribute to the movement of the isolator.} ({Safer is to play:} 11... Bxc3
12. bxc3 Nbd7 {[%cal Gd8c7] followed by £c7. This is a different type of
middlegame position - a pair of isolated pawns “c3”+”d4”. We would
like to notice that this specific pawn structure will be subject to a separate
topic in our magazine.}) 12. a3 {A key move! White prepares to play Bd3, while
preventing Nb4. One the queen is on “d3”, White intends to play Rаd1, in
order to prepare the d4-d5 move or to build a battery on the diagonal
“b1-h7”, using Bа2 - b1 maneuver.} Be7 13. Qd3 {[%cal Ga1d1] Diagram [#]
Diagram [#]} Nh5 $6 {Black made a typical mistake for these positions. With
his last move, Black seeks to exchange the dark-squared bishops, as such 14.
Bxe7 14...Nxe7. As a result, the knight from “h5”, goes to “f6” and
Black totally controls the square “d5”. It should be also noted that the
exchange of the dark-squared bishops diminishes the white’s offensive
potential - as we know, the side playing against the isolated pawn seeks for
the exchange in order to get to the endgame. However, the move 13...Nh5 is
premature, because White is not obliged to the exchange the bishop, he can put
it on “d2”!} ({It was better to choose this order:} 13... h6 14. Bh4 Nh5
15. Bxe7 Nxe7 {[%cal Gh5f6,Ge7d5] followed by Nf6. Black has a full game ahead.
}) 14. Bd2 $1 {Here is the difference! Black not only failed to exchange the
dark-squared bishops, but also removed his horse from the center. “d4-d5”
threat begins to take real shape.} Nf6 ({The gain of the pawn also looked
attractive:} 14... Na5 15. Ba2 Bxf3 $2 16. Qxf3 $1 {[%cal Gf3h5,Gb2b4]} Qxd4 {
Diagram [#] The knight on “h5” is under attack, but black’s position is
still kept together by the unprotected bishop on “d2”. No matter how
strange this looks, but Black loses because of the limited mobility of the
other knight (Nа5).} 17. Rad1 {[%cal Gf3h5] Diagram [#]} Nf6 18. b4 $1 $18 {
Black is defenseless. The knight has nowhere to go - 18...Nс4 is followed by
19.Bf4}) 15. Rad1 Na5 $6 {The beginning of a wrong plan - Black neglects the
development of the heavy pieces, while helping White to implement his idea
(Ba2-b1). It is necessary to point out that by putting the horse on “a5”,
grandmaster Sosonko intended to strengthen the control over the strategically
important square “d5”. However, as we will see later, White has a very
convincing answer.} ({Better was} 15... Rc8) 16. Ba2 Nd5 $2 {Diagram [#] Black
continues to follow his wrong plan - in pursuing his strategical goals, he
forgets about the tactical resources of his opponent. The problem is that we
cannot block an isolated pawn with a piece.} ({Again it was better to play}
16... Rc8) 17. b4 $1 {This specific move escaped Sosonko’s attention.} Nxc3
$2 {Diagram [#] The third and last mistake. Now, the only passive white piece
(Bd2) reaches the big diagonal. White has a huge advantage in development and
he is ready to push d4-d5.} ({It was necessary to choose:} 17... Nc6 18. Nxd5
exd5 {The position has changed again form the structural point of view. On the
board we have the so-called “symmetrical pawn structure”, which will be
discussed in details in the next issue of our magazine. For now, we will say
that in this type of middlegames, the side that has a better development of
the pieces has also the advantage. In the position from the diagram, White has
a very typical attacking idea:} 19. h4 $5 {[%cal Ga2b1,Gg7g6,Gh4h5] Diagram [#]
White intends to play Bb1 and to confront g7-g6 with h4-h5. Of course, before
pushing the “h” pawn, it is advisable to point the weaknesses on the dark
squares on the kingside with ¥h6. Interesting is that the pawn cannot be
gained:} Bxh4 20. b5 Na5 21. Bb4 {Diagram [#]}) 18. Bxc3 Nc6 19. d5 $1 {
[%csl Rd5][%cal Gd1d8,Ge1e8,Gc3h8,Ga2g8] Diagram [#] Diagram [#] When there
are no better places to put your pieces, it is a sign that this is the moment
to push the isolated pawn! The Black’s position is falling apart.} exd5 20.
Bxd5 Qc7 (20... Bf6 21. Qc4 $18 {[%cal Gd5f7,Gd5c6]}) 21. b5 $1 Na5 22. Be5 $1
{Diagram [#] Last accurate move - now the black material losses are inevitable.
} Qc5 (22... Qc8 23. Bxg7 $18) (22... Qd8 23. Bxb7 Nxb7 (23... Qxd3 24. Rxd3
Nxb7 25. Rd7 $18) 24. Qd7 Nd6 25. Qg4 g6 26. Qf4 $18) 23. Bxb7 Nxb7 24. Qd7 Na5
25. Bd4 {Diagram [#]} 1-0

Part 2 of the article will follow soon. I am also happy to announce that you can use the promo code dbojkov for 15 % discount on any of the products of "Modern Chess".