Category Archives: Chess tactics

Chess Opening: Nimzo-Indian Defense Theory to Practice

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Posted by ChessMaster on August 16, 2009 – 4:48 pm
Filed under Beginner Chess Tips, Chess Basics, Chess lessons, Chess Opening, Chess Strategy, Chess tactics, Chess Tutorials
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Like we did in Chess Opening: Queen’s Gambit Theory to Practice to expound with examples on how QGD opening theory in Chess Opening: Control of Center – Part 3 can turn out in practice, here we show practical examples on Nimzo-Indian Defense theory discussed in Chess Opening: Control of Center – Part 2.

To show both sides of the defense, we picked up two games, one going in favor of White and the other in favor of Black. What should be interesting is that in both these games of approximately equal length, Garry Kasparov was on the Black side and both were played around the same period. It gives a better opportunity to understand what Kasparov (or his opponents) did right or wrong to produce different results! Both games use the chess opening of Nimzo-Indian Defense Normal Variation (ECO code: E53).

Vladimir Kramnik-Garry Kasparov
London, 2000		   Evgeny Vladimirov-Garry Kasparov
Batumi, 2001
 
1. d4 Nf6     1. d4 Nf6  
2. c4 e6     2. c4 e6  
3. Nc3 Bb4     3. Nc3 Bb4  
4. e3 0-0     4. e3 0-0  
5. Bd3 d5     5. Bd3 d5  
6. Nf3 c5     6. Nf3 c5  
7. 0-0 cxd4     7. 0-0 cxd4  
8. exd4 dxc4     8. exd4 dxc4  
9. Bxc4 b6     9. Bxc4 b6  
 
nimzoindian1   nimzoindian1
Identical position has been reached as the same moves have been played in both games.
 
10. Bg5 Bb7     10. Qe2 Bb7  
11. Re1 Nbd7     11. Rd1 Bxc3  
12. Rc1 Rc8     12. bxc3 Qc7  
13. Qb3 Be7     13. Bb2 Bxf3  
 
  Position after 13 moves
 
  nimzoindian3
 
14. Bxf6 Nxf6?   Black’s move creates all the subsequent problems. 14. … Bxf6 would be better. But there are records of other games where the same moves were played and the games ended in a draw but in those games, Black did not accept the offer of Bishop sacrifice by White at move 15.
 		   14. Qxf3 Qxc4!   With the offer of this exchange sacrifice, Black laid a nice trap for White’s Queen!
Position after 14 moves
 		  
nimzoindian2
 		  
15. Bxe6! fxe6   As pointed out earlier, Black could possibly do better to play 15. … Rc7
 		   15. Qxa8 Nc6  
16. Qxe6+ Kh8     16. Qb7 Nd5  
17. Qxe7 Bxf3     17. Re1 Rb8  
18. gxf3 Qxd4     18. Qd7 Rd8  
19. Nb5 Qxb2     19. Qb7 h5  
20. Rxc8 Rxc8     20. Bc1 Na5   The White Queen is pathetically trapped! When Black offered the exchange sacrifice at move 14, he must have envisaged this situation.
 
Position after 20 moves   Position after 20 moves
 
nimzoindian4   nimzoindian5
 
21. Nd6 Rb8     21. Qxa7 Qc6  
22. Nf7+ Kg8   22. Ne8 would fail against 22. … Ng8
 		   22. Qa6 Nc4  
23. Qe6 Rf8   White’s move created Philidor’s position, which possibly made Black to bring his Rook to f8 but the Rook became vulnerable as shown by White at move 25. 23. … h5 could provide stiffer resistance.
 		   23. Rb1 Nc7   White resigned as he has to lose his Rook to save his Queen
  The final position
 
  nimzoindian7
 
24. Nd8+ Kh8      
25. Qe7   Black resigned as 25. … Rg8 26. Nf7# or 25. … Re8 26. Qxe8+ Nxe8 27. Rxe8#. The only line that could offer a longer resistance is 25. … Rxd8 26. Qxd8+ Ng8 27. Qd5 and White would need to play carefully to translate his advantage into a win with Black trying to avoid a Queen exchange.
 		  
The final position
 		  
nimzoindian6  

 

Chess Opening: Queen’s Gambit Theory to Practice

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Posted by ChessMaster on August 15, 2009 – 12:33 pm
Filed under Beginner Chess Tips, Chess lessons, Chess Opening, Chess Strategy, Chess tactics
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While learning the theories behind the chess openings especially with an eye to center control and development of pieces, you must understand that if both players could continue along the best theoretical lines, the game would end in a draw! But theory cannot take you to the end because if it could, there would not be any point in playing that kind of chess!

So a stage will come where theory comes to an end ideally with both players at level, and thereafter the players are on their own. The game is then decided through one player making some mistake, however slight it may be, and the other player being able to identify and exploit it. You will often notice that one may be able to get away with a minor mistake but situation keeps getting worse with each additional wrong move. Of course, a palpably bad move will draw the curtains on the game that much faster!

In the three-part article on Chess Opening: Control of Center, we just showed how the initial moves for different openings aim to seize control of center. What happens after those initial skirmishes depends on how each player carries forward his ideas. Unless you examine practical games arising out of those opening moves, your grasp of the potentials will remain a little nebulous. For this reason, we plan to show you at least two master games on the openings discussed, one going in favor of White and the other in favor of Black, so that you get an idea of why those games produced opposite results!

In Chess Opening: Control of Center – Part 3, we took you up to the sixth move. In the following two games, you will see identical development up to the 12th move after which those take their own path.

Max Euwe-George Thomas
Hastings, 1934		   Milan Vidmar-Movsa Feigin
Hastings, 1936
 
1. c4 e6     1. d4 d5  
2. Nc3 d5     2. c4 e6  
3. d4 Nf6     3. Nc3 Nf6  
4. Bg5 Be7     4. Bg5 Be7  
5. e3 0-0     5. e3 Nbd7  
6. Nf3 Nbd7     6. Nf3 0-0    
 
QGDgame1   QGDgame1
 
Though the first game started differently, it has ultimately reached the same standard position. These initial moves were shown to impress on you that even when you are on unfamiliar ground, it is often possible to bring the game back to known territory through transposition of moves.
 
7. Rc1 c6     7. Rc1 c6  
8. Bd3 dxc4     8. Bd3 dxc4  
9. Bxc4 Nd5     9. Bxc4 Nd5  
10. Bxe7 Qxe7     10. Bxe7 Qxe7  
11. 0-0 Nxc3     11. 0-0 Nxc3  
12. Rxc3 e5     12. Rxc3 e5    
 
QGDgame2   QGDgame2
After the previous position, moves 7-12 are identical to bring both games to same identical position as dictated by theory of ECO code D68. If ECO code D69 is followed, the next two moves would be 13. dxe5 Nxe5 14. Nxe5 Qxe5. If you see the next two moves of the first game, you will see that it stuck to this route with a little difference in sequence, but the second game went into a different variation which went astray at move 15.
 
13. Nxe5 Nxe5     13. d5 e4!  
14. dxe5 Qxe5     14. Nd4 c5!  
15. f4 Qe7?   By retreating the Queen there, Black allowed the unhindered progress of White’s KBP   15. Nb5 Nf6   By chasing the Knight with his pawns, Black gained in tempo while acquiring more space. Black is eyeing the g4 square for his Knight taking advantage of the absence of defensive pieces close to White’s King. 15. Nc5 Qe5 16. Ng3 Nf6 would give White a better but complicated game.
 
16. f5! b5     16. Qb3 Qe5   White probably planned to advance his QP but Black’s Queen move pre-empted this by creating threats on White King’s position with a possible Ng4.
 
17. Bb3 b4   Black offered his c6 pawn to get White’s e3 pawn. White has no objection, he just wanted to time it right!
 		   17. Be2 b6   Not 17. … Nxd5 as 18. Rxc5 would pin the Knight. But after the text move, this would be possible.
QGDgame3
 		  
18. f6! gxf6   The Black Queen’s position enabled White to sacrifice his KBP to break open Black’s castle.   18. Rd1 Rd8   Trying to support the QP, White left his KBP weak and Black’s QB can force the exchange of White’s defender Bishop pinned against his Rook at d1.
 
19. Rxc6 Qxe3+   White timed the exchange of the pawns to bring his Rooks to exploit the broken castle of Black King. You may also notice how White’s pawn moves were gaining tempo whereas Black’s pawn moves were not getting anywhere!
 		   19. f4 exf3  
20. Kh1 Bb7   Though Black opened a line to the White King for his Bishop, White’s threats are more real. 20. … Be6 could provide a defense against White’s threats.
 		   20. Bxf3 Bg4  
  QGDgame4
 
21. Rcxf6 Qe4   Black goes through his plans oblivious of White’s threats!
 		   21. Rcd3 a6  
QGDgame5
 		  
22. Qd2! Kh8   Black vacated g8 square to position his Rook but White continued to be one step ahead!
 		   22. Na3 b5   The Knight has practically been forced out of the game!
23. Bxf7 Rac8   Black was hoping to get his QR to the 7th rank at c2 as the option of Rg8 has been taken away.
 		   23. R3d2 c4   Black’s pawns keep marching ahead, severely restricting the movement of White pieces.
24. R6f2 Rcd8   White defends his KNP and prepares his Queen to take control of the open g-file.
 		   24. Qc3 Qh5  
25. Qg5 Rd6   Black prevented 26. Qf6# but did not anticipate White’s stunning response!
 		   25. Bxg4 Nxg4   White had to give in to allow the Knight’s move.
26. Bd5!! Resigns   Black cannot handle the mating threats by White Rook at f8 and by White Queen at g8.   26. h3 Nf6  
    27. Rd4 Rd6  
    28. Nc2 Re8  
The last board position is shown below.   29. Qa5 Rxd5   White kept alive a mating threat on Black’s base rank and threatened to decimate Black’s Queenside pawns.
 
QGDgame7   QGDgame6
 
    30. Rxd5 Nxd5  
    31. Rd2 Qg6  
    32. Rxd5 Qxc2   White accepted the exchange of Knights hoping to save his KP by virtue of his threat of baseline mate of Black King.
 
    33. Re5? Qd1+   White resigned as he cannot avoid losing his Rook. White could offer greater resistance by 33. Rd8 Qc1+ 34. Kh2 Qxe3 35. Rxe8+ Qxe8 36. Qxa6 though Black would retain a marginal advantage because of his extra pawn.
 
The last board position is shown below.
 
  QGDgame8

 

Revisiting some old chess strategies: Utilizing ‘the Square’

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Posted by ChessMaster on August 4, 2009 – 2:56 pm
Filed under Chess Basics, Chess Strategy, Chess tactics, Chess Tutorials
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We are quite sure that all of you studied basic geometry in your school days. Among the first few theorems you studied, there was one that said: sum of any two sides of a triangle is greater than the third. You believed it to be universally true, didn’t you? Well, let me prove that it is not true for some parts of your chessboard!

two sides equal one

Let us consider the triangle formed by the squares a1, d4 and a7. If your King is sitting on a1, how many steps does it need to reach a7 walking along the a-file? Let us count: a2-a3-a4-a5-a6-a7, total 6 steps. Now let it go along the other two sides, a1-d4 and d4-a7, and count: b2-c3-d4-c5-b6-a7, total 6 steps again! Have I proved my point?

Some of you must be wondering what the point is in all this and others may be downright annoyed about such a silly proposition. But if you bear with us, we can tell you that keeping the above in mind can help you to tackle successfully many chess problems involving King and Pawn endings, either for a win or for a draw.

Take the simplest chess endings with a King and Pawn for both sides but positioned near opposite edges of the chessboard. You may have to follow a strategy of keeping options open for your King to move to either edge depending on the tactical plan of your opponent. The chess tactics for you will be to maintain a middle path till your opponent makes that critical move disclosing his plan and you can accordingly move your King to the required side.

middle of the road keeps options open

The above diagram shows the principle behind such tactics. The square a7 can be reached in same number of steps from either a4 or d4 but if you need to move midway to the other edge, you can move to h4 in three steps from d4 against seven steps from a4. We hope you understand the merit of such tactics. If you think carefully, you will realize that the concept of the square lies behind this chess tactics.

To make it clear with an example, we draw your attention to the endgame position described in Chess tactics in end games. For easy reference, the position is reproduced below where White with first move can snatch an ‘impossible’ draw!

White to move and draw

You can see the comments against the moves in the referred article – here we only show how the ‘square’ boundary changes with each move by Black Pawn. We also show how the White King’s area of effective influence ultimately comes in contact with his own pawn and intersects the ‘square’ of the Black pawn (indicating the possibility of capture) after his 3rd move (Fig. 3).

figure1   figure2
figure3   figure4
figure5   figure6

The triggering action was Black’s 3rd move (Fig. 4). This move disclosed Black’s intention to promote his pawn, so White King veered towards his own pawn (Fig. 5) to promote it likewise. Had Black captured the White pawn at this stage (3. … Kxc6) leaving his own pawn at h4, White King would move towards the Black pawn. White King would be able to step into the Square (refer Fig. 3) by playing 4. Kf4 and it would also be able to capture the Black pawn. White’s strategy ensured a draw either way.

Remember that the above chess tactics can be applied in many other endgame positions, not necessarily only the King and Pawn types. You only have to remember this type of chess tactics of moving the King along a diagonal.

 

Analyzing a position to create combinations

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Posted by ChessMaster on July 27, 2009 – 9:21 am
Filed under Attacking tactics, Chess lessons, Chess tactics, Chess Tutorials
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In Working out Chess Combinations, you could work out an eight-move combination by identifying the strengths and weaknesses of both sides and to some extent worked your way backwards to find the moves that created the winning combination. But in the previous examples, there were quite a few pieces on board and the mobility, at least for some pieces, was restricted so that you could eliminate a good number of possibilities.

In the problem that we are posing now, there are only a few pawns and some heavy pieces on the board which is open to both sides for moving respective Queen and Rook. In fact, many beginners get daunted by such positions because they think that there are too many moves possible for their Queen and Rook and taken together with the responses from opponent’s Queen and Rook, the number of combinations may be overwhelming! Let us now examine if we risk getting bogged up in the maze of moves!

finding combination in an open game

I do not have to say who has got the move because if it were White, this discussion would not be necessary. With Queen and Rook on the seventh rank, it is only a matter of two checks by the Queen to checkmate the Black King. But Black having the move, you have to be acutely aware that Black cannot let go of checks if aforesaid action by White has to be stalled. You should also note that in absence of Black Queen and Rook from their base rank, Rb8+ by White is enough to checkmate Black King.

If you consider Qc4+, you know that White Queen cannot interpose by Qe2 as in that case Rd1+ mates the White King (the Queen being pinned cannot capture the Rook). So only option for White is to move the King and e1 is the only escape square available for that. But then Black’s only move is Rd1+ and after Kxd1, he can try Qd3+. Of course White cannot play Kc1 (you work that out), but Ke1 allows still one more check by Qd2+. The White King has to move to f1 but further check by Black at d1 or d3 allows White to interpose with his Queen (by Qe1 or Qe2). After this, Black soon runs out of checks and that puts paid to further resistance by Black. So this line is not tenable.

That leaves Black with only Rd1+ when White’s only option is Ke2. If Black now tries Rd2+, White King can retreat to previous position and Black has nothing left but a draw by repetition of moves. But will you be that desperate for a draw before exploring other options?

You can see that Qg4+ supports the Rook and allows White only two options:
(i) move King to e3 (i.e., Ke3)
(ii) interpose with pawn by f3

It may look that Ke3 is not viable as Black can play Re1+ to capture White Queen. But can Black do that? As soon as Black plays a non-forcing move like Rxe7, White’s Rb8+ leads to checkmate of Black King!

On Ke3 by White, Qd4+ forces the King to move to f3, as Ke2 allows Qd3# mate by Black. With King at f3, Black’s Rd3+ forces King to e2 (you should think why interposition by White Queen at e3 is now futile) but next check by Rd2+ brings King back to f3. Now Black’s Qxf2+ drives the King into the wide open and it should be possible for you to keep checks going with Queen and Rook for a checkmate if King remains on e-file, but if it moves towards g-file, a pawn check at appropriate time ends the White King’s journey!

What about the other option of interposing by pawn move f3? Trying to guard the diagonal, White exposes the King along rank 2 and Black can play Qxg2+! White cannot take the Rook as that would allow checkmate by Qd2#. So the only move for White is Ke3. On Qd2+, the King is forced into the open by its only move Ke4. Black keeps pressure on by Qd4+ and King is driven into the hands of the Black pawns and Black Rook can also attack by Rg1+ when King moves to g-file. You can certainly work out the rest.

So you are now sure that after Black’s first move of Rd1+ in the diagram position, White King cannot avoid checkmate whatever it may do.

In the actual game, played between Heinrich Wolf and Jacques Mieses at Monte Carlo in 1902, White chose the option (ii) at his 30th move and Black delivered checkmate after another 5 moves.

So far as this and the examples in related previous articles on chess combination are concerned, we could find the way by following a methodical approach. But I also told you that such system may not work universally. Situations where a combination came out of the sheer brilliance of a mind and could not be seen even by a Grandmaster opponent, such analysis may not show the way beyond a certain step. This is particularly true where a move makes sense only when seen in context of subsequent moves and the brilliancy is realized by taking all these moves together. The following example is a case in point.

a famous combination

The position shows that Black has one Bishop less but he has two passed pawns extra, one being only two moves away from promotion. Black Rook at a5 is in a position to capture the Bishop at e5 and also to move to a1 for capturing the Queen. Obviously, it is White’s move now and he has to tackle these threats, possible only by forcing moves on Black King to retain a tempo. On the plus side, White has Rook and Queen lined up on f-file and if the line can be opened, he can plan his assault on Black King, possibly with help from his Bishop attacking the g7 pawn and the Rook at c3 moving up to 7th or 8th rank when it can do so. But while working out the attacking plans, White cannot afford to lose a tempo, otherwise Black will launch his counter-attack as described above.

It is easy to see that White can play Ng6+ creating a fork on the Queen and White will be obliged to capture the Knight with f-pawn. White in turn can play fxg3 thereby opening the f-file and the discovered check retains tempo with White. It is apparent that Black cannot play Ke8 (because of White’s Rf8+ and Qf7#) or Ke7 (due to White’s Rf7+ / Qf5+ / Bg3+ / Qd3#). So the only possible move by Black that does not lose immediately is Kg1.

If White plays Rf7 with intention to play Rxg7 leading to mate, Black can counter this by capturing the Bishop with Rxe5 and threatening Re1 next, when White’s plans fall through. Were White’s Rook not standing in his Queen’s way, Qf7+ would be possible but as it stands now, White cannot afford to lose tempo by playing Rf7.

This far could be analyzed through a systematic approach, but can White take his initiative forward beyond this point? It is very difficult to imagine and needed real brilliance by White to make this a famous combination because of his next two moves!

You may give it a try before going through the following moves.

From the diagram position, the game proceeded as follows:

1. Ng6+ fxg6  
2. fxg6+ Kg8  
3. Rc8! Rxc8   The move by White together with his next move were difficult to anticipate
 
4. Rxc2! Rf8   White’s move cleared f-file for Queen while retaining the tempo.
White’s Rook cannot be captured because of the threat Qf7+ leading to mate.
 
5. Rc8 Qe7   White keeps attacking the f7 and f8 squares and Black tried to counter these threats
 
6. Qc4+ Kh8   6. Bd6 can be countered by 6. … Ra1+
 
7. Qh4 Ra1+   Black has nothing better to do as 7. … Qxh4 allows Rxf8#
 
8. Bxa1 Qe3+   desperation!
 
9. Kh1 Rxc8   While starting on his combination, White must have seen that Black has no more check after his King moved to h1.
10. Qxh5+ Kg8  
11. Qh7+ Kf8  
12. Qxg7+ Ke8  
13. Qf7+ Kd8  
14. Bf6+ 1-0   Checkmate is inevitable on White’s next move

 

Working out Chess Combinations

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Posted by ChessMaster on July 27, 2009 – 8:52 am
Filed under Attacking tactics, Chess lessons, Chess tactics, Chess Tutorials
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In the first article on Chess Tactics: Method Approach to Calculating Combinationson, we shared our ideas on how to proceed systematically for analyzing a situation for its inherent possibilities. The subsequent step is to work out our next sequence of moves which comprises a chess combination. The whole game of chess is expected to consist of many such nodal points where each node is planned (hopefully!) to yield some advantage, however microscopic it may be. In accumulating these advantages as we proceed from node to node, we expect at some stage to have enough to give us a win – well, that is the general idea!

While describing some suggested methods, we showed a simple example on how to put the ideas into practice. Continuing on the theme in Looking to find the best chess combination in a middle game position, we took up two slightly more complex positions and tried to apply the method for finding out the actual moves that were played over the board.

We will now examine another position and see how far our methods can help to reach the goals we seek. In the position shown below, Black has the move and we will try to figure out his best course of action.

a Morphy combination

You notice that in terms of material, White has a huge advantage because of his Queen against a Bishop. But look where the Queen is! Excepting for a support to the Rook at f1, a defensive role, it serves no useful purpose and could as well be not there on the board! White QB has become a bad Bishop, being blocked in by the White pawns in front and the QR position is no better. Only the KR has scope of some activity but, for now, it has taken away one escape square for the totally exposed White King in case of a Rook check from g6 along the open g-file. In such event, the King perforce has to move to h1.

You also realize that Black’s Rook at e8 can freely move to e1 when necessary to attack the White King on its base rank, provided the White Rook can be made to leave its present rank. Black’s KB can also join the battle any time by capturing the f2 pawn under certain situations. In a nutshell, Black should be able to force White’s surrender – all it needs is to find the sequence of moves!

When White is forced to move his King by Kh1 because of Black’s Rg6+, a check by Black’s QB from g2 (i.e., Bg2+) would force White to play Kg1. The Bishop then captures the f3 pawn (i.e., Bxf3) to deliver a discovered check from the Rook at g6 and White King has nowhere to go (assuming his Rook remaining at f1).

To enable Bg2+, Black needs to play Bh3 after White’s Kh1 and this, inter alia, attacks the Rook at f1 also. White has only two options:
(i) play Rg1 for capturing the Black Bishop when it comes to g2, or
(ii) play Rd1 to vacate the f1 square for the King’s escape from the discovered check.

We can disregard White’s move like Qd3 to attack the Rook at g3, as it can easily be nullified by Black playing f4 (White could still try Qc4+ but Black’s Kh8 puts an end to it), and then Black can continue with original plans.

If we probe further, we can see that if White plays Rg1, Black could still play Bg2+. This is because, as we noted earlier, the move Rxg2 makes the Rook leave the base rank allowing Black to play Re8+ which becomes decisive!

So the first option (Rg1) is ruled out and we have to consider White’s Rook move to d1. Black can go ahead as before but now White King can move to f1. In this position, Rook at g6 can move to g2 for playing Rxf2+ on next move. White King cannot go to e1, so it has to go back to g1. Black then plays Rg2+ which creates double check by Rook and Bishop and irrespective of King’s move to f1 or h1, it is checkmate by Rg1#.

But what if White plays Qxb6 to stall White’s Rxf2+? No problem, Black captures Rxh2 and White cannot prevent the coming Rh1#.

We can now write down the moves:


1. …        Rg6+
2. Kh1     Bh3
3. Rd1     Bg2+
4. Kg1     Bxf3+
5. Kf1      Rg2
6. Qd3     Rxf2+     (6. Qxb6   Rxh2   7. any   Rh1#)
7. Kg1     Rg2++
8. Kf1      Rg1#

See how you could work out a combination comprising 8 moves! Only thing is that the actual player of Black pieces did not have to think this long to work it out. I am quite sure of it, seeing that he was none other than Paul Morphy! I come nowhere near Morphy, so I can be excused! However, Morphy played the moves a little differently and you can play through the game at any online archive to see how he did it.

Louis Paulsen, who played as White and was among the top five players of that period, propounded the idea that any brilliant attack would fail against correct defense. This idea found acceptance with Steinitz, a future World Champion. But the curious point is that Paulsen failed to prove his idea in this game played at New York in 1857!