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Wednesday, November 30, 2011

Tsunami In the Opening.

Pin It Once Tolemy went to Socratice and said,"Sir, I want to learn Geometry from you. I wish to learn it as fast as i can. You know I am a king and hence I do not have more time to spend on it.

On which Socratice replied, "Mr. Tolemy, always remember that life can be led through two ways one is Royal way and other is difficult way. There is an option either Royal way or difficult way. You have a choice. But as far as education is concerned there is no choice. there is only one way and that is 'difficult way' You have no option.

Dear friends, While going through the jungle of chess variations, different tactics and strategies, and Manoeuvres we have to adopt the difficult way. Very tactical devices such as discovered check, pin, fork, x-ray, clerance, double attack, blockade, sacrifice etc are employed. To learn these devices we have to follow the difficult way and not Royal way. The sacrifice is an essential element of a combination. But it is by no means every error that is punished by a combination, i.e. with the essential use of a sacrifice. An erroneous move can sometimes be refuted by a forcing manoeuvre on its own.

1. e4 e5 2. Nf3 Nc6 3. Bc4 Bc5 4. c3 Nf6 5. d4 Bb6 $2 6. dxe5 Nxe4 7. Qd5 Bxf2+
8. Ke2 *





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Saturday, November 26, 2011

Mate With Two Bishops.

Pin It Sometimes we reach the situation where endgames become very tedious and we feel we should stop game here and declare draw. But playing such games and practicing for it is more interesting than any other endgames.

Here is one of the most facinating endgames. Mating with two Bishops requires the king is to be shifted to the edges of the board, not only to the edges of the board but to the corner of the board.

Is it simple to force the king to move to the corner of the board. If you think it is not possible then check it out how it works.

Once you got the idea try placing two Bishops and Kings on the board and practice it.

















1 Kf2 Kd4 2 Bf3 Kd3 3 Be5 Kd2 4 Be4 Kc1 5 Ke3!

While trying to force the king to move to the corner be careful is will have a space to move otherwise it will be a stalemate.

5 ...Kd1 6 Bb2 Ke1 7 Bc2 Kf1 8 Kf3 Kg1 9 Bf5 Kf1 10 Bc3 Kg1 11 Kg3 Kf1 12 Bd3 Kg1 13 Bd4+ Kh1 14 Be4 Mate.

It is very important that the kings opposition is to be maintained every time the opponents king move.

You may like to read the following articles.

Demolition of Pawn Structure

Decoy : the way of attack in chess

One move from the ideal square.



Wednesday, November 23, 2011

Weak Pawns.

Pin It The pawn, wrote Philidor, is the soul of chess Although he wrote it some two hundred years ago, and although it remains valid today, many amateurs do not realize just what it means and how they can profit by understanding it.
The pawn formation that results from the opening is the Principle determinant of the further


course of the game. The position of the pawns largely indicates where the other forces are best disposed, and it is the clash of unbalanced pawn structures that makes chess a fight. that is why symmetrical pawn structures usually lead to drawish positions.

Furthermore, given the sophisticated technique of today's masters, weak pawns are excellent targets, and the loss of a single pawn can mean the loss of game. Therefore, good players avoid weak pawns assiduously.

What is a weak pawn? A pawn that is exposed to attack and also difficult to defend is weak. there are several varieties : Isolated, doubled, too advanced, retarded. An isolated pawn, because it is separated from the neighboring pawns and cannot be supported by them, requires defense by pieces. these pieces are called passive since they must function below their full potential. A doubled pawn is limited in mobility; its weakness is usually felt in the endgame because a group of pawns that includes a doubled pawn is less likely than a healthy group to produce a passed pawn. a pawn that is advanced too far runs the risk of being cut off from the rest of its army and becoming isolated. A pawn not advanced far enough can get in the way of the other pieces and may become backward and vulnerable.

Weak pawns can be tolerated in certain cases, particularly when you have, or are sure to get, equivalent compesation, like a strong attack or at least the creation of an equally weak pawn in the opponent's camp. Best, of course, is to avoid them.

You may like to read,

Security of the KIng's Bunker.

Seven Rules of Development.

Decoying the strategy

Monday, November 21, 2011

Security of the KIng's Bunker.

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Pawns at their original positions are considered to cover the king best, as they protect all neighbouring squares, which makes it more difficult for the attacker to exchange pawns and break open files for his rooks.



Threat of Back Rank Weakness :

However the arangement of pawns in a line also has its drawbacks, e.g. it is frequently necessary to take into account checkmate threats through back rank weakness.














Any advance of these pawns useally weak the castling positio, and since the pawns cannot move back, this weakness is irreparable and long lasting. Take a look at the following diagram,
















The advantage of this structure consists of the fact the king has an empty h2 square to escape to a so-called hole and safe oneself in case of back rank weakness.
However, the structure has some disadvantages. The h3-pawn is a good target for tactical blows. The attacker can sacrify the piece to destroy the kings bunker.

Advance with g-pawn :

When you make a move with the g-pawn , there arises a pawn arrangement similar to the wedge. Such an advance can be both voluntary and forces. In both cases it results in a significant weakening of the f3- and h3-squares. Also, the diagonal a8-h1 and f1-h3.

However there is a fianchetto bishop on g2-square protecting the weakness, the castling position usually is quite safe. The opponent always try to exchange this piece.















Advance with f-pawn :

The f-pawn is pushed ahead no less often. In this case the g1-a7 diagonal and especialy the e2-square are weakened. Besides the pawn on f3 occupies the square which is more suitable for knight.

At the same time the placement of the pawn on f3 is a positive factor in the endgame, as it allows the king to reach the cnetre quicker.















There are situations when two pawns are advance f3 and h3. then the whole complex of squares near this king is weak. In those cases attacks along the a7-g1 and b8-h2 diagonals are especially dangerous.

Besides there is a 'hole' on the g3-square which frequently is a very convenient outpost for the opponent attacking pieces.


The pawn cover of the king can include double pawns. Which can be both rather strong and hopelessly weak

1. The doubled pawns provides a rather reliable barrier for the king. But these barriers also have their weakness.

a) When h2 pawn moves to g3-square, it weakens the H-file.

b) when f2 pawn moves to g3-squares it weakens the a7-g1 diagonal.

Doubled Isolated Pawns : The doubled isolated pawns arising after an exchange on the squares f3 or h3 are especially unpleasant for the defensive side. Such pawn are not only weak in themselve but in addition expose the g-file, the a8-h1 diagonal and the f3-square respectively the g-file and the h3- square.

2. Finally the kings pawns can also looks like a chain. such cover is considered to be very weakened too, as the a8-h1, a7-g1 and h3-f1 diagonals are easily accesible for the oponents pieces.

In both cases advanced pawns can be easily attacked by the opposite sides. On the top of that the position in the left diagram has the weakened 2nd rank.





Sunday, November 20, 2011

Seven Rules of Development.

Pin It Before going to the seven rules of development we should see the attributes/elements of the chess strategy. These are ,


1. The Centre
2. Development and arrangement of pieces.
3. Pawn structure.
4. Strong and weak square and points.
5. Open lines and diagonals.
6. Advantage of the Bishops pair
7. Position of the King.


Keeping these seven elements in the mind one has to do the development of chess pieces.

The seven Rules of Development :

1. Do not make more than two or three pawn moves ( First develop your central pawns)
2. As soon as possible develop your Bishops and Knights.
3. Your pieces should occupy or attack the central squares.
4. Do not move with the same piece twice if it does not give you any direct profits.
5. Do not go for opponents pawn if it does not help the development of your pieces.
6. Do not hurry to bring out yur queen until your king has castled.
7. Develope your pieces in such a way that they prevent the development of your opponent.

All these above rules are conditional so I never call them as rules but just the guidelines.


Saturday, November 19, 2011

Decoying

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The act of decoying plays important role when one piece is overworked and engaged in defending one, two or three pieces or one , two or three squares. If such piece is decoyed then the square or pieces it is defending becomes vulnerable.

Here Black Plays 1 ... Re1  2 Rx e1  Qd4+

White queen will have to capture the Black queen or Black queen will capture it and subsequently the white queen will get decoyed.


                                                      Its indirect control over the e1 square will get removed.




In this position Black queen is guarding Black Rook which is attacked by White Queen and Two Black Bishops are also defended by the Same Black Queen. If this Black Queen is deflected or decoyed the Black rook and the Bishops will become vulnerable. or defenceless.

1  Qc4+   Kb8   2  Rxd7 Black Queen is compelled to move.





White Rook on d1 is guarded by Queen on f3. Think of decoying this queen on f3.

1 .... Qc6

drawing the queen away from defending the rook at d1, and at the same time attacking the rook at b5, forced White to resign.


Thursday, November 10, 2011

Decoy : A strategy in Chess

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It is a tactical device that forces the opponent's piece or pawn to leave its position and give

access to an important square or line.














White to Play
Can you think how Queen can be moved away the 7th rank. Just see if white captures Black Bishop on b7-square and Black Queen captures the White Bishop. The queen is deflected to b-7 square but still remain guarding the 7th rank. Now think how Queen can be decoyed to other rank?
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Still problem the check How the game follows,

1 Bxb7 Qxb7 2 Qd5 Black resigned, in view of the fact that he loses a piece : 2...Qxd5 3 Nxe7+ and 4 Nxd5; 2 ... Nc6 3 Qxc6!

Here is another Example.

White to Play

Black Bishop on e7-square is guarded by Rook and attacked by White Knight on g6-square. Think of decoying the rook from the 7th rank. I give you the Hint that it can be done by using a long range missile.
Are you getting the Hint? If not see the game that followed.

1 Qa8 ( launching a long range missile) The capture of Queen is followed by  Nxe7+  (forking King and Queen)

But if  Instead of capturing the queen Black plays 1.... Rb7 then 2 Nxe7+  Rxe7  3  Qb8 with the same result.

Important


The motiff behind this is the exploitation of hidden weakness on the eight (or the first ) rank. The act of decoying the pieces guarding the eight or the first rank can bring a tsunami in the opponents field. 

Another Example :


White to Play

If Black Queen id decoyed to either Q-side or K-side then the Back rank will become weak.
Checking for the candidate move which will compel Black Queen to Move to either side.

1  Rc2!

(attacking Queen compeling it to move)   


1 ...Qxd4

( Black avoids to move to either Q-side or K-side knowing its back rank weakness. )   


2 Rc4    (Againing attacking Black Queen with intention to deflect it )

2 ... Qb6   

Black plays with the intention to improve its back rank weakness and strengthening the d8-square)

3  Rc8+   Rd8  4 Qb5   (Decoying the Queen ends the game.)



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Wednesday, November 9, 2011

Demolition of Pawn Struction.

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1. Rxe7 {(Here the king is well surrounded by two pawns  and if these pawns
structure forming bunker for the King can be demolished. To bring out Saddam
Hussain we have break open his bunker or entice him to come out of the bunker)}
Rxd5 (1... Qh3 2. Rxf7+ Ke8 3. Qe3+) 2. Qf6 {(Instead of capturing Black Rook
white supports its rook and enhance the attack on f7 pawn)} Rg7 {( The forced
move)} 3. Rxb7 {( The next move of White will be Qd8 and mate due to Blacks
backrank weakness and therefore Black will have to improve its backrank
weakness)} (3. cxd5 {( capturing the Rook here would have brought Tsunami for
the White. His complete game would have been destroyed.)} Qh3) 3... Qc8 {
(again a forced move)} 4. cxd5 Qxb7 5. Qd8# 1-0








{( The Black King is well behing the bunker formed by three pawns and a Knight.
The Back rank is also strongly defended by two rooks and a queen and hence it
is difficult exploit back rank. Therefore, the concentration should be on the
demolition of the Bunker to bring out the King)}

 1. Nxg7 Kxg7 2. Bxh6+ Kg8 

(2... Kh8 3. Bg7+ Kxg7 4. Qxh7+ Kf8 5. Qh8+ Ke7 6. Rxf7+) 

3. Rg4+ Rg6 4. e6 Nd6
5. exf7+ Rxf7 6. Rxg6+ Kh8 7. Rxf7 Nxf7 8. Bg7+ Kg8 9. Bf6+ Kf8 10. Bxd8 *


More examples on demolition of pawn structure would be added.

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Decoy : The way of attack in Chess.

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It is a tactical device that forces the opponent's piece or pawn to leave its position and give access to an important square or line.


It is nothing but compelling the opponent to leave the square or the line in case of Bishop or Rook or Queen.




1. Nf7 Qe8 (1... Kxf7 2. Qh5+


Ke7 3. Rxe6+ Kxe6 4. Re1+ Kd6 5. Qc5+ Kd7 6. Qf5+
Kd6 7. Qe6#) 2. Rxe6 Qxe6 3. Nd8 Qe4 4. Nxc6


If You observe the Diagram you will find that the White King is behind the Bunker of Two White Pawns.
The Pawn exactly in front of the White King if force to move to either f3 or h3 square then the White King will be open for attack and it will become vulnerable. Forcing g2 pawn to f3 is possible only through sacrifice either by capturing it or forcing it to capture the piece placed at f3-square.

If White avoids capturing Knigt at f3

 1... Nf3   Kh1  Nf2#

If White captures the Knight on f3-square.

2 gf3  Rg6   3  Kh1  Nf2#

A smothered mate through a tactic of Decoy.


In the diagram the on the e3-square is well protecting the White King on diagonal c1-h6 from the Black queen attack. One can think of capturing this pawn by Black Knight on f5-square and simultaneously forking White Queen and Rook. Then the White will have the forced move of capturing the Black Knight.

See how the game follows.

1...Ne3!  2 Ke3  (forced move)  Ng4!  Check and again ready to occupy the e3-square to fork the White Queen and Rook.  Kd2  Qf4  4  Ke1  Ne3

The game may go like this,

1... Ne3!  2 Ke3  Ng4!  Bg4  Qf4  4  Ke2  Qf2#


The more will be added....

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Tuesday, November 8, 2011

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A piece is best improved to the point where it is just one move away from its ideal square. Only when our pieces occupy this position are they ready to be transformed into their perfect state Here is the example .



In this famous position, from the game Lasker-Capabalnca , St. Petersburg 1914, White's knight


on e6 is already ideal, but let us take a look at the rest of the pieces. The Rd1 wants to reach a7, The other h7 and the king is better moving away from the same diagonal as the Bishop - in the game Lasker chose the g3-square for the king, and that seems to be a wise choice. The other knight needs to find itself a good square, and in the game this leads to e4-e5 followed by Nc3-e4, from where it rules the world. But let us take a look at how the game went.

31  hxg5  hxg5  32 Rh3!

The rook is on its way to its ideal square, h7, simultaneously vacating g3 for the king, But now after,

32...Rd7  33 Kg3  Ke8

White continues to improve his pieces slowly with

34. Rdh1  Bb7?!  35  e5!!

The pawn is of little importance. Control over the dark squares means everything.

35...dxe5  36  Ne4  Nd5  37  N6c5!

Now Black is lost. Notice how the rooks have not rushed off to their ideal squares since they could do little on their own. After 34 ...Bb7 Black was lost in a sea of forks but it is still worth noting that white had prepared his pieces, one by one, to almost their optimum before finally slotting them into ideal squares all at once, so to speak. White now won easily.

37  ...Bc8  38  Nxd7  Bxd7  39  Rh7  Rf8  40  Ra1  Kd8  41+  Bc8  42  Nc5  1-0

Intuition does not develop as random pattern recognition, but rather the recognition of patterns previously investigated and understood. That is why looking through unannotated games from a database or playing through the complete works of Averbakh will not seriously improve your chess. Instead we should work with annotated games and - even better - discuss positions with stronger players who know something about teaching. Analysing your own games in depth and trying to understand the reasons for mistakes you commit is, obviously, also a part of this. It is my hope these simple tools will prove helpful for you in this task.


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Monday, November 7, 2011

The Bishop.

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There are three types of Bishop. You may get confused for three types of Bishops since there are only two types 1) Dark Bishop 2)Light squared Bishop. No it is not so, there are three types,


1) Good Bishop : A Bishop is considered good when its central pawns are not on its colour and thus are not obstructing its activity.

2) Bad Bishop : A Bishop is considered bad when its central pawns are on its colour and thus Block it.

3) Active Bishop : An active Bishop can be either good or bad; it's called active simply because it serves an active function.

There are some Bishop rules to follow in the game of chess.



Bishops are long range pieces and love wide-open positions that are free of central pawns.


In the endgame, Bishops are great at stopping enemy pawn,s which they can often do from the other side of the board.

If your are unfortunate enough to possess a bad (and inactive) Bishop, you are usually well advised to do one of three things :

1. Trade the offending piece off for an enemy Bishop or Knight.
2. Make it good by moving the central pawns off the colour of your Bishop.
3. Get your Bishop outside the pawn chain. Many games have been won by turning an impotent bad Bishop nt a 'bad' but active piece.



In the endgame, Bishops are great at stopping enemy pawns, which they can often do from the other side of the board.


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If a player gets the two Bishops versus a Bishop and Knight or Two knights, he usually wants to retain them because, working together, the Bishops control squares of both colours. If your opponent has two Bishops, trade one of them off and leave yourself with a more manageable Knight versus Bishop or Bishop versus Bishop scenario.

Heavy Pieces

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Knights and bishops are normally the most important pieces in the middle game. The reason is simple : Rooks and Queens are more susceptible to incoming fire than minor pieces, Of course there are such things as rook sacrifices, exchange sacrifices, queen sacrifices and so on. But

there are also blunders and trapped pieces (pins, forks and other disasters), Heavy pieces are chivalrous yet fragile species.

The fewer pieces there are on the board the more squares will become available for the heavy pieces and, consequently, their strength increases for every exchange.

This is the theory at least. With plenty of pieces on the board, knights and bishops are capable of hassling the rooks and queens in the way that makes them seek shelter behind pawns and/or other lesser beings. Often the heavy pieces stand with their backs against the wall and show a little muscle while they let the young the restless fight the battle for the centre. When did you last see a combination where only the major pieces remained on the board?  Tactical properties belong to some extent to the minor pieces, while the major pieces come to life only when plentyof blood has already been spilt on the board.

Howerver, there is one situation where heavy pieces come into their being in the middlegame. This is when you have a rook against two pieces, or a queen against three pieces and the minor pieces are poorly co-ordinated.. Tal in particular was great at using the heavy pieces against minor pieces. The following position is probably the most extreme case of positional compensation with a heavy piece.




White is about to regain some material, but hardly enough. And on top of all that, Black effectively has passed pawn on the c-file. But there are other factors which are significant. Black's king is in trouble, the a6-pawn is about to fall and White will have a passed pawn, too. However, without his supreme understanding of the capacities of the heavy pieces Tal would not have gone for this endgame, and the world would have been robbed of a masterpiece. White managed to win after.

30 Qxf8+  Kg5  31  bxc4  bxc4  32  g3  Be4  33  h4+  Kg4  34  Kh2  Bf5  35  Qf6  h6  36  Qe5  Re4  37  Qg7+  Kf3  38  Qc3+  Ne3  39  Kg1  Bg4  40  fxe3  h5  41  Qe1  Rxe3?

Tal writes the following in what Murray Chandler and others have called the best ches book ever : "Fatigued by the foregoing struggle, Panno makes a mistake. 41...Re6 would have drawn quickly since 42 e4 gets nowhere after 42 ...c3. Now white has real winning chances.' the book is, of course, The Life and Games of Mikhail Tal. The best is  the endgame university by Mark Dvoretsky,

42 Qf1+ Ke4  43  Qc4+  Kf3  44  Qf1+  Ke4  45  Qxa6  Kd4  46  Qd6+  Kc4  47  a4  Re1+  48  Kf2  Re2+  49 Kf1  Ra2  50  Qa6+  Kd4  51  a5  c4  52  Qb6+  Kd5  53  a6  Ra1+  54 Kf2  c3  55  a7  c2  56  Qb3+  Kd6  57  Qd3+  1-0


H

Annotated Game

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1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 Nc6 5. Nc3
Qc7 6. f4 a6 7. Nb3

{This is hardly the most dangerous way to meet the
Taimanov variation. If white plays 5 Bd3 against 4...a6 Black wil often play .
..Bc5 with the idea Nb3 Be7! and the white goes to b3 just to avoid the
exchange on d4, giving Black free rein. Besides returning to these discussed
lines with ...Be7 at some point, she can also delay this in favour of other
reasonable moves.}

b5 8. Bd3 d6 9. Be3 Nf6 10. Qf3 Bb7 11. O-O h5 {(Diag A)




All Black's previous moves have been natural. This pawn advance might seem odd
to those not familiar with this modern treatment of the sicilian defence,
which is as much of a defence as an AK-47 'Defence' Rifle. The unprovoked ...
h5-move was first played in some positions in the Taimanov to start with, and
had by 2005 spread to lines of the Najdorf, Dragon and other Sicilian systems.
there are many ideas associated with this often it is played to prevent the
advance g2-g4, though here it is played more aggressively, with ideas of ...
Ng4 and at times also ...h5-h4-h3, putting pressure on the white king's
position. Ulibin's next move is very natural, though new. Previously White
had played 12 h3, preventing the knight coming to g4 for good, but not without
disadvantages. As white cannot hope for an opening advantage after his
slightly unnatural play, Black is already dreaming of winning the game and
exercising some breathing room with the advanturous. ...h5}

12. Kh1 {0} Be7 13.a4

{This was played by Sax from Hungary without the moves Kh1 and ...Be7
included. It was not very good then either, though Sx's opponent reacted
strangely with ...b4 and then ...e5. Cramling's reaction is more natural and
puts pressure on the white position, though it might be too early to talk aout
and actual advantage}

b4 14. Nd1 {( Dig B)




This looks strange, so we should
ask ourselves, why would White want to put his knight here? It runs out that
Ne2 does not work, because of another feature of the h-pawn's advance, tht the
white knight cannot protect e4 from g3 as it would be hunted down as soon as
it arrived there.}

d5

{It is very natural to open the long white diagonal.
With the bishop on d3, White is set up to attack h7, but Black is also set up
to attack the g2-square.}

15. Nf2 dxe4 16. Nxe4 Nxe4 17. Qxe4

{But this is very bad mistake. Ulibin must have thought that the threat to the g7-pawn
would save him, but instead it turnsout to be entering the dragon's lair.}

Na5 18. Qd4 Nxb3 19. cxb3

{We have come to the crunch point of the game. The
position might look equal at first glance, both players having borught out the
queen and bishops, but without active rook play at the moment. Black can win a
tempo, but the pawn on g7 is hanging, making it an unattractive option.} 1-0

Sunday, November 6, 2011

Attacking on one colour

Pin It "I have long suspected, whenever the books I read began discussing dark-square weaknesses or an attack on the dark squares, that the subject was not only beyond my understanding, but beyond the author's as well. 'Certainly', I would say to myself, 'it must be true that the enemy dark squares will be weak if his pawns stand on the light squares and he loses his dark-square bishop. But if he then removes al of his pieces from the dark squares, what will be left for me to attack<'


Such was my of reasoning until the day I realised that a weakness of the dark squares is also a weakness of the pieces and pawns on the light squares. Light square weaknesses are also possible, resulting in a weakening of the enemy pieces and pawns on the dark squares" - David Bronstein

The quote above is one of the most famous in chess literature, found in the introduction to the first game in one of the most influencial chess book of all time, David Bronstein's Zurich International Chess Tournament 1953 (here given in Jim Marfia's translation).

Bronstein's realisation that domination one half of the board, here the dark squares, will also lead to the domination of the other half of the board, is of course an important one Still some people will probably think that although cess is not draughts will the pieces on opposite colours, this is still not that important a realisation, This is because they miss out on an even more basic point : Most chess pieces are colour blind! Bishops, knights and pawns can only control squares of one colour at a time, the queen is biased towards the colour of the square it is standing on, the rook will aim at the same colour square it is standing on, the rook will aim at the same colour square first in all four directions, and the king at the edge of the board is alos biased, Thoughthe ches board was probably divided into light and dark squares by an artistic soul, thinking in black and white shuld not be underestimated as an important tool, both in technical and in dynamic positions.


Black is weak on the dark squares as a result of having exchanged his dark squared bishop for a knight He is hoping to survive this problem by having played --f6 and thereby block the position with the pawns. But it takes more than a few pawns to stop Bronstein, one of the greatest attackers of the 20th century.

24. Qd4

White is threatening to play 25 Nxf6, demolishing the dark squares and exposing the weaknesses. This forces Black to play.

24 ... Qd6 25 Qa1!

This move keeps control of the dark squares of the dark squares and attacks the black queen , thus winning the necessary tempo.

25 ... Qa6

Black keeps an eye on f6 as well, but the queen has to leave the centre of the board to do so.

26. Rxe7!!

The tactics are not too difficult to calculate, but what I want to emphasise here is the complete destruction of the dark squares.

26... Rxe7

The most tenacious defence was probably 26 ... Ne5, although this too is not sufficient to save the game.

White wins after 27 Rxf7! Kxf7 28 Bd5+ followed by 29 Nxe5 with deadly attack.

27 Nxf6+ Kh8 28 Nd7+ 28 ...Ne5 29 Nxe5 Kg8 30 Nc6 1-0

White's strategy ins this example is so simple that few of us would actually think of it as a strategy, but rather as a variation calculated with precision.