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Avances observados al año 2020: ¿cuál es el punto de partida?

G A M E 44 Buenos Aires 1 939 Sicilian Defence

White: P.S. M I LNE R-BA R R Y ( E ngland)

Black: J. FOL TYS (Czechoslovakia)

e4 c5

2 Nf3 Nc6

3 d4 cxd4

4 Nxd4 Nf6

5 Nc3 d6

6 Be2

Milner-Barry is one of the best con­

noisseurs of the Dragon Variation ( . . . g6) and he does not wish to avoid this line of play. There would be no serious objection to 6 Bg5, especially since White, in reply to 6 . .. h6, could go back with the bishop to e3 and try to exploit the weakness of d6.

6 7 Be3 8 Nb3 9 f4

g6 Bg7 0-0 BeG

Game 44 Sicilian Defence

1 2 Ne4 Winning the queen.

Black resigns

10 0-0

1 0 g4 appears to lead only to a draw after 10 . . . d5 1 1 f5 Bc8 1 2 exd5 Nb4 etc. (Aiekhine·

Botwinnik, Nottingham . 1 936).

10 . . . Na5 A better l ine is 10 . . . Oc8, followed by 1 1 ... Rd8 and eventually . . . d5, gaining control of that square.

1 1 f5 12 g4

Bc4

An important improvization, instead of the alternative 1 2 Bd3 which has been exclusively adopted , with­

out convincing success, for some time.

1 2 13 Nxa5 1 4 Qxe2

Nd7 Bxe2 Oxa5

Page 99

Game 44 Sicilian Defence This will finally lose a pawn with­

out compensation. Necessary was 1 7 . . . fxg6 and if 1 B Bd4 then 1 B . . . Rf8 19 Nxe7+ Kh8 2 0 Qg3 Nf3+

21 Rxf3 Bxd4+, fol:owed by 22 . . . Bxb2 with a possible defence.

18 Bd4 Nf3+

The I ikely attempt 1 8 . . . f6 would have been successfully countered by 19 g5!

19 Qxf3 Bxd4+

20 Kh1 Rf8

20 . . . f6 21 g5! would only have given White new possibil ities.

21 Nxe7+ Kg7

22 c3 Be5

23 Rf2 Qd8

24 Nd5 Qh4

A counter-attack based on the open h-file is Black's only hope of salvation.

25 Raf1 Rae8 But now he could have freed his rook from the defence of f7 by playing 25 . . . f6 and if 26 Rg2 (26

Threatening not only 27 g5 but also (after 26 . . . f6 for example) a forced Kh7 would have helped only for a short time after 28 Oe2, followed by 29 Rf3 and 30 Rh3+.

28 Nf5+ Kf7

29 h4 Rh8

Hoping to sacrifice the exchange at h4 after 30 Kg1 . But White has a more convincing reply.

White to move

Position after 29 . . . Rh8 30 Rh2! gxf5 Or 30 . . . Of4 31 Oxf4 Bxf4 32 Rxf4 gxf5 33 gxf5 winning.

31 hxg5 Rxh2+

32 Kg1 Reh8

33 Qxf5 Rxb2

Clearly 33 . . . R h 1 + leads to nothing.

34 Od7+ Kg6

35 Rxf6+

From beginning to end White's play has been fuil of energy and deter­

mination.

G A M E 45

Buenos Aires 1 939 Sicilian Defence

White: ROM ETTI (France) Black: C. DE RONDE (Holland)

1 e4 c5

2 Nf3 Nc6

3 d4 cxd4

4 Nxd4 Nf6

5 Nc3 d6

6 Be2 g6

7 Be3 Bg7

8 0.0 0-0

9 f4

The usual move here is 9 Nb3 and the text advance has been con­

sidered dubious by theory because of the following reply. After this game, this opinion will need to be reviewed.

9 . . . Qb6 Seeking risks and , i n fact, giving White the opportunity to make a strong pawn sacrifice. 9 . . . Bd7 would have left h is opponent with an appreciable advantage in space.

Game 45 Sicilian Defence

35 Bxf6

36 Qf5+ Black resigns If 36 . . . Kg7 then 37 Oxf6+ Kg8 38 g6.

b c d e

Posi·c:ion after 9 ... Qb6 10 e5 !

I do not know whether this move has been played before. The latest edition of Modern Chess Openings, revised by Fine, mentions here only 10 Qd3 ( ! ) and continues 10 . . . Ng4 1 1 Nd5 Bxd4 with equal chances. The idea of the sacrifice in the text is to forestall the response

10 . . . Oxb2 which would have been played after 10 Nf5.

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Game 45 Sicilian Defence

10 dxe5

1 1 fxe5 Nxe5

12 Nf5 Oe6

If 1 2 . . . Od8 then simply 1 3 Oxd8 Rxd8 14 Nxe7+ Kf8 15 Bc5 or 1 4 . . . Kh8 Bg5 etc. And if 1 2 . . . Oxb2 then 1 3 Nxe7+, fol lowed by 14 Bd4 with a won game.

13 Nxg7 14 Od2

Kxg7 Neg4

As the continuation demonstrates, this loses by force. After 14 . . . Ng8 1 5 Bd4 f6 16 Nb5 White would have full compensation for the pawn sacrificed.

1 5 Bd4 Od7

There are no satisfactory moves. If 15 . . . Nh6 then 1 6 Nd5 etc. with a quick decision.

White to move

Position after 15 .. . Qd7 16 Qf4

As a reward for his tenth move White has rapidly obtained a won

Page 1 02

position, but he should have found the best way of forcing immediate resignation. This final manoeuvre consisted of 16 Bxg4 Oxg4 1 7

Rxf6! exf6 1 8 Nd5 with numerous deadly snares, the most direct one being 19 Bxf6+ KgB 20 Ne7 mate . The queen manoeuvre in the text merely puts off the inevitable execution.

16 1 7 Og3 18 Rae1 1 9 Bd3 20 Oe5

Qf5 Oe6 Nh6 Qg4 Ng8

Realizing that the pursuit of the · White queen would be i n vain. For example: 20 . . . Oe6 21 Qf4 Og4 22 Bxf6+ exf6 23 Oxf6+ Kg8 24 Nd5 winning.

2 1 Nd5 22 R xf6

Bd7

The simple 22 Nxe7 would also be sufficient.

22 exf6

23 Nxf6 Qxd4+

24 Oxd4 Nxf6

25 Rf1 Bf5

26 Bxf5 Rad8

27 Bd7 Rxd7

28 Oxf6+ Black resigns A game of appreciable theoretical value.

G A M E 46

Championship of Lithuania 1 942 Sicilian Defence

White: HASEN FUSS Black: TETER IS

1 e4 c5

2 Nf3 d6

3 d4 cxd4

4 Nxd4 Nf6

5 Nc3 g6

6 Be2 Bg7

7 Be3 0-0

8 g4

Although the attack initiated by this move may be premature, it certainly presents Black with difficult problems and threatens a strong offensive.

8 ' ' ' d5

Clearly this is not an acceptable solution. 8 . . . Nc6 seems better.

9 e5 1 0 f4

Ne4 Nxc3 1 1 bxc3 a6

The alternative was 1 1 . . . Nc6 or 1 1 .. . Nd7.

1 2 h4 Oc7

13 Od3 Nd7

1 4 Nb3 Rd8

Black's weaknesses stand out more and more clearly. The idea of Iibera·

tion by means of a sacrifice is not possible; for example, after 14 . . . Bxe5 play would go 1 5 fxe5 Nxe5 16 Qd 1 Nxg4 17 Bxg4.

Game 46 Sicilian Defence

1 5 Bd4 Nf8

16 Oe3 Oc6

1 7 h5 Be6

If 17 . . . Ne6 there follows 1 8 hxg6 hxg6 19 f5.

1 8 0-0-0 f5 1 9 exf6 exf6 20 hxg6 hxg6 2 1 f5 ! Bf7 If 21 . . . gxf5 22 gxf5 Bxf5 23 Rdg1 .

22 Rh3 ReS

23 Od2 g5

23 . . . Nd7, fol lowed by 24 . . . Ne5 would have been much better.

24 Rdh1 Qc7

He should still have played 24 . . . Nd7 which offered better resistance.

Evidently White's combination was not suspected.

Page 1 03

Game 47 Sicilian Defence

White to move

b c d e f h

Position after 24 . . . Oc7

G A M E 47 Munich 1 942 Sicilian Defence White: P. K E R ES Black: J. FOL TYS

e4 2 Nf3 3 d4 4 Nxd4 5 f3

c5 d6 cxd4 Nf6

In this move there is more venom than effectiveness. Black of course selects the most logical and prom is·

ing line.

5 e5

6 Bb5+ Bd7 7 Bxd7+ Nbxd7 Less common is 7 . . . Oxd 7 8 Nf5 d5 9 Bg5 d4! 10 Bxf6 gxf6 with apparent equality.

Page 104

25 Oxg5 !

Of course it is not possible to take the queen or. pain of mate in two moves (26 Rh8+).

25 Bg6

26 fxg6 Rxe2 27 Bxf6 Nxg6 28 Oxg6 Black resigns Since he cannot play 28 . . . Oxc3, naturally.

8 Nf5 9 Bg5 10 Od3

Nb6 d5

In order to reply to 10 . . . dxe4 with 1 1 Ob5+.

10 . . . g6?

This weakens Black's pawn structure, which will definitely occasion rr.aterial loss. I ndicated was 10 . . . a6 1 1 Bxf6 gxf6, eventually followed by . . . d4.

11 Ne3 d4

12 Ng4 13 Nxe5 14 Bh6?

Be7 0-0

This offers Black the chance of material compensation. Thus 14 0-0 is preferable.

14 . . . Bb4+

But Black does not take advantage of this good opportunity to save his game. He ought to have played 14 . . . ReS with haste, after which White, in order to obtain control of the centre, would have had to give away a pawn. For example : 1 5 0-0 Bd6 16 f4 ! Bxe5 1 7 fxe5 Ng4 1 8 Bf4 Nxe5 1 9 Bxe5 Rxe5 20 Nd2 etc. After the unfortunate text move Black's game is clearly inferior.

15 c3! Re8

1G cxb4 Rxe5 1 7 0.() ReB 1 8 Nd2 ReG 1 9 Rac1 RecG 20 RxcG Rxc6 21 N b3 Rc4 22 Rc1 ! Oc7

If 22 . . . Rxb4 there would follow 23 a3 Ra4 24 Nc5 winning the exchange.

White to move

b c d h

a b e I

Position after 22 . .. Oc7

Game 47 Sicilian Defence

23 Oxd4!

After this excellent move what follows is simple.

23 Rxd4

24 Rxc7 Rd7

25 Rc1 Ne8

2G Nc5 Re7

27 a4 fG

28 Bf4 Kf7

29 Kf2 Na8

30 Bb8 b6

31 NaG Rb7

32 Rc8 Ke7

33 Bg3 Black resigns This game, which was so important for Foltys, was very unsafely played by him.

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Game 48 Sicilian Defence GAME 48

Munich 1942 Sicilian Defence White: J. FOL TYS Black: G. STOLTZ

e4 c5

2 Nf3 e6

3 Nc3 d6

4 d4 cxd4

5 Nxd4 a6 6 a4

Preventing Black's planned 6 . . . b5.

6 Nf6

7 g3 Bd7

8 Bg2 Nc6

9 0-0 Be7

10 Kh1 0-0

1 1 f4 Oc7 1 2 Nf3 Nb4 1 3 Be3 Rac8 1 4 a5! d5 1 5 Bb6 Qb8

1 6 e5 Ne8

17 Nd4

White has assured h i mself of a very considerable advantage through his exemplary handl ing of the opening.

Nonetheless, in the next few moves he lets an opportunity pass by.

17 1 8 f5

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Nc7 Ne8

a b c d e f h

Position after 18 . .. NeB 19 fxe6?

Much better is 19 Bh3! with the following possible continuation : 19 . . . Oxe5 20 Re1 Qf6 (20 . . . Qd6? 2 1 fxe6 fxe6 22 Rxe6 ! ) 2 1 fxe6 fxe6 2 2 Nxe6 Rf7 2 3 Bg4!

with numerous threats, the main one being 24 Bd4 etc.

1 9 fxe6

20 Rxf8+ Bxf8 21 Oe2 Nc7!

After 21 . . . Nc6 White would be able to continue 22 Nxd5 with advantage.

22 Bh3 Nc6

23 Oe3 24 Oxd4

Nxd4 Nb5 More prudent would have been 24 . . . ReB first.

25 Nxb5 axb5

26 Ba7 Qc7

27 c3 b4?

A deplorable mistake which quickly loses the game. The way to proceed was 27 . . . Ra8 28 Bb6 Oc8 and Black would have good defensive means at his disposal.

28 cxb4 Qc4? ? Black's last hope could have been 28 . . . Qc2.

G A M E 49

Buenos Aires 1 939 Sicilian Defence

White: A. A L E K H I N E (France) Black: A. TSV ETKOV (Bulgaria)

e4 c5

2 Nf3 d6

3 c3

The idea of this unusual move is to construct a pawn centre with 4 d4 if Black does not play 3 . . . Nf6 immediately. After the knight move White, with the advance of the e­

pawn, has the chance of obtaining a favourable position, particularly since the I ine has not been analysed l ike other variations of the Sicilian.

3 Nf6

4 e5 dxe5

5 Nxe5 Nc6!

Consenting to impair his pawn structure with the aim of elimin­

ating White's only developed piece.

Game 49 Sicilian Defence

29 Qxc4 Rxc4 30 b5 Kf7 31 a6 bxa6 32 bxa6 Bb4 33 Bb8 Bc6, 34 a7 BaS 35 Bd6! Bxd6 36 exd6 Rc6 37 Rf1+

Ke8 38 d7+ Kxd7 39 Rf8 Rc1+ 40 Kg2 Rc2+ 41 Kf3 Bb7 42 Rb8! Kc7 43 a8(Q) Bxa8 44 Rxa8 Rxh2 45 Bxe6 h5 46 Bxd5 Rxb2 47 Rh8 Rh2 48 Kf4 Kd6 49 Bf3 h4 50 Rxh4 Rxh4+ 51 gxh4 Black resigns

6 Nxc6 bxc6

7 Bc4 Bf5

The play against White's backward queen's pawn will compensate for the weakness created on the queen's side.

8 d3 e6

9 Qf3 Qd7

10 h3

With the object of answering 1 0 . . . Bd6 with 1 1 Nd2 (and then Ne4 or Nb3) and 10 . . . Rd8 with 1 1 0-0 etc. In reply to immediate castli ng Black would have played 1 0 Bd6, followed eventually by . . . Ng4.

10 Be7

1 1 Nd2

Page 1 07

Game 49 Sicilian Defence I n this way the following transaction will secure White a slightly preferable ending; however it would perhaps have been more promising to play 1 1 0-0 RdB 1 2 Rd1 Nd5 13 Be3, eventually followed by Nd2-e4.

1 1 Rd8 1 6 Nc4 White would have achieved the same advantage as in the game.

The text move is inconsequential because Black's middle-game chances are now equal.

1 5 0-0

16 Nc4 Oc7

17 Oa5

Trying to rectify his previous queen move.

Position after 17 Oa5 Page 1 0B

1 7 . . . Oxa5?

Fortunately for White, Black here shows evidence of a lack of initiative and decision; by avoiding the ex­

change of queens he would have obtained a middle-game which might perhaps have yielded a different result. For example: 17 . . . Ob7 1 8 Be3 Nd5! 1 9 Bxc5 Nf4 o r 1 B Bf4?

Oe4 19 Bc7 ReB etc. and B lack's development is compensation for the weakness on the queen's flank.

The endgame that follows is highly instructive, despite the apparent simp! icity of the means employed by White, and represents a typical example of a consistent exploitation of the double weakness of two pawns on the same side of the board.

18 Nxa5 Rd6

1 9 Be3 Ra6 20 Nb3

White does not need to prevent the advance of the Black c-pawn because this would turn out to be to his own advantage after 20 . . . c4 21 Nd2 ReB 22 b3 Nd5 23 Bd4 Bf6 24 Nxc4 Nxc3 25 Bxc3 Bxc3 26 Rac1 with a strong knight and a pawn majority on the queen's side.

20 ReB

21 c4!

Depriving the Black knight of its best square, d5. It is interesting to observe how Black, without com­

mitting any errors, will be first reduced to complete passiveness and then obliged to give up material without being able to improvize anything in his position.

2 1 . . . Kf8

22 Rfd1 Rd6

The reduction in forces is welcome to the side which has its movements restricted - as is Black's case since his pieces are paralysed by the necessity of protecting h is c-pawn . But a s the continuation shows, the combination of three pieces (rook, bishop, and knight) supported by the king is all that is required to exercise decisive pressure on the queen's side.

23 Rxd6 Bxd6

24 Rd1 Ke7

25 Na5 Be5

Parrying the strong threat 26 Nb7.

26 Rd3 !

Solely because of the possibil ity of manoeuvring this active rook does Black's position (which would have been fairly pleasant after, say, 26 Rd2 Ne4 or 26 b3 Bc3) gradually become critical.

26 . . . Rc7

And not 26 . . . Bxb2 27 Rb3 Be5 28 Rb7+ Rc7 because of 29 Nc6+

winning a piece.

27 Rb3 28 f4

Nd7

Just at the right moment because 28 . . . Bd4 loses a pawn after 29 Bxd4 cxd4 30 Rd3. After 28 . . .

Game 49 Sicilian Defen::e

31 Rd3

The immediate 31 Rb5 would per­

haps have shortened the game but as Black is from now on condemned to complete inactivity White really has no need to hurry.

31 Ke7

32 g4

This and the following pawn moves have a very clear purpose; White is preparing the most favourable position on the k ing's flank for the moment when he breaks through 0n the other side.

The initial move of the winning plan.

The king will be provi5ionally reserved for the protection of the c-pawn, which will allow for the knight to go

Black has managed to defend his c-Page 1 09

Game 50 Sicilian Defence pawn adequately, but now it is the a-pawn's turn!

45 Nc3! Rb7

46 Nb5 Kb6

47 b4 a6

48 Nc3 Kr.7

White planned 49 Na4+ etc. The pawn can no longer be protected and the alternative of abandoning it by 48 . . . Rc7 would have proved that Black is without hope : 49 Ne4 ! Kb7 (or 49 . . . f5 50 gxf5 exf5 51 Nc3, followed by 52 Nd5+, winning) 50 bxc5 NbS 51 Nd6+.

49 Rxa6 cxb4

50 Nb5+ Kd8

51 axb4 Bxb4

52 Rxe6 Bc5

53 Bd2!

Intending a decisive simplification : 54 Ba5+ Bb6 (or 54 . . . Nb6 55 Rc6) 55 Rxb6 Rxb6 (or 55 . . . Nxb6 56 c5 ) 56 Kd4.

53 Nf8

54 Rc6 Nd7

G A M E 50 Prague 1 943 Sicilian Defence White: A. A L E K H I N E Black: J . PODG O R N Y

e4 2 c3 Page 1 1 0

c5

White to move

Position after 54 . . . Nd7 55 Ke4!

The weakness of Black's e6 permits the White king to start up a mating attack, thereby bringing the game to

an end more rapidly than by any other exploitation of h is material advantage.

55 Ke7

56 Kd5 Bg1

57 Bb4+ Kd8 58 Ke6

Threatening 59 Be7+, followed by mate next move and thus forcing the win. Black resigned.

In reply to this relatively l ittle­

played move (which is in no way

inferior to the other systems of combating the Sicilian Defence), Black can play : (a) 2 . . . e6 3 d4 d5 4 exd5 etc. (b) 2 . . . d6, after which White would, of course, continue with 3 d4. (c) 2 . . . Nf6 3 e5 Nd5 4 d4 e6 etc., a form of Alekhine's Defence. In fact the text move can resu lt in Black's queen finding herself in an exposed position. But, on the other hand , White will have to seek, by means of tactical manoeuvres, compensation for the isolation of h is central pawn.

2

Equally possible would be 5 dxc5 Oxc5 6 Be3 Oa5 etc., but White has no wish to avoid the isolation of the pawn since he desires to demon­

strate that Black will not have avail­

able the necessary time to exploit this weakness.

5 Bg4

6 Be2 cxd4

If 6 . . . e6 immediately then 7 h3 ! Bh5 8 c4, followed by castling, with complications advantageous to White.

7 cxd4 e6

8 Nc3 Bb4

This aggressive move, in conjunction with the following one, leads to compl icated tactical problems.

9 0-0 Oa5

Game 50 Sicilian Defence

White to move

Position after 9 . .. QaS

We are already at the critical point in the game. If White does not find the l ine of play appropriate to the position he will not only lose his advantage in development (which rests especially in the fact that h is king is in absolute safety whilst the future of that of his rival is un­

certain) but will also find that the eventual weakness of h is isolated pawn may occasion him serious trouble. If, for example, he plays 10 Bd2 Nf6 1 1 a3 then the con­

tinuation 1 1 .. . Bxc3 12 bxc3 Ne4 13 Bel ! would, to be sure, give h i m full satisfaction w�re it not for the fact that Black, instead of such a line, would answer 1 1 a3 with 1 1 . . . Be7! 1 2 Nb5 Qd8, followed by 13 . . . 0-0 and White would have achieved absolutely nothing. Also tempting at first sight is 10 d5 since 10 . . . 0-0-0 would be punished by 1 1 Ng5 ! ; but - apart from the consequences of 10 . . . RdB 1 1 Ng5 Bf5 etc., which would leave nothing clear on the horizon - Black can simply play 1 0 . . . exd5 1 1 Oxd5 (if 1 1 Nxd5 0-0-0 with advantage) Page 1 1 1

Game 50 Sicilian Defence

and now either 1 1 . . . Oxd5 1 2 Nxd5 Bd6 o r 1 1 . . . Bxc3 1 2 Qe4+

Be6 13 bxc3 Nf6, followed by castling on the king's side, with a satisfactory game for Black in both cases. Consequently White is obl iged, on account of the very position, to seek a combinative continuation which, in some l i nes, will involve impl icit sacrifices. The objectives that White will pursue are ( 1 ) the Black king and (2) the Black queen. The following move requires a very thorough analytical examination of the position.

10 a3! !

The difficulty of this move lies firstly in the fact that it does not appear to threaten anything (an exchange of the two rooks for the Black queen would be of doubtful value in this position - see the note to White's next move) and it per·

mits Black to play an important developing move. Secondly, not only does it fail to parry the threat 1 0 . . . Bxc3 1 1 bxc3 Oxc3 but, so to speak, it actually invites Black to put this plan into operation.

Therefore the consequences of 1 0 . . . Nf6 and 1 0 . . . Bxc3 had to be examined with particular care.

10 . . . Nf6 at least, be able to consolidate his position by castli ng) 1 2 . . . Nge7

not see how Black can parry the multiple threats of his adversary.

1 1 d5!

This move alone (and not the exchange mentioned above 1 1 axb4 Ox a 1 12 Ob3 Bxf3 1 3 Be3 Oxf1 + 1 4 Bxf1 Bd5 1 5 Nxd5 Nxd5 1 6 b5 Nee 7, toll owed by 1 7 . . . 0·0 with a defensible game for Black ) con·

stitutes one of the most important objectives of the combinative play begun with 10 a3 ! !

Position after 1 1 d5 1 1 . .. exd5 Besides this move, the following were to be considered : (a) the inter­

polation of 1 1 . . . Rd8 (or 1 1 . . . 0-0·0 ) , which would have been triumphantly refuted by 12 Ob3 ! , threatening 1 3 axb4, followed b y 1 4 Be3 winning t h e queen; ( b ) 1 1 . . . Nxd5 which would have received the reply 12 Nxd5 exd5 13 axb4 Oxa1 14 Ob3 Bxf3 15 Bg5! Oxf 1 + 1 6

Bxf1 Be4 1 7 f3 ! and Black, not having ma"a£ed to castle, will succumb, given the dislocation of his pieces (the knight will be expelled by b5). After <he text move White will force a l iquidation that will guarantee him a siight material advantage.

12 axb4 13 Nd2!

Oxa1

Threatening 14 Nb3 and thus forcing the exchange that follo\'1/s.

1 3 Bxe2

14 Oxe2+ Ne7

If 14 . . . Kf8 then 15 Nb3 Oa6 1 6 b 5 Ob6 1 7 Na4 N d 4 1 8 Od 1 and wins.

1 5 Re1 !

More attractive but insufficient would be 15 Ob5+ Nd7 16 Re1 on account of the reply 16 . . . Kd8!

1 5 • . • 0-0

Evidently this is the only chance of avoiding an immediate catastrophe.

16 Nb3 17 Qxa6

Oa6 bxa6 18 Rxe7 Rab8

Game 50 Sicilian Defence

Likewise after 1 8 . . . Rfb8 1 9 Na2 ! Re8 20 Rxe8+ Rxe8 2 1 h3 White's material advantage would gradually impose itself.

1 9 b5

Now this advance prevents for good the entry of the Black rooks into enemy territory.

1 9 axb5

20 Rxa7 b4

21 Na2 Rfc8

22 f3 Ra8

23 Rxa8 Rxa8

24 Kf2 Nd7

25 Nf4 Nb6

26 Ke3 ReB

27 Kd3 g5

A desperate try since there exists no defence against the threat of 28 Be3 Nc4 29 Bd4.

28 Nh5 Black resigns In fact after 28 . . . h6 29 Be3 Nc4 30 Nf6+ Kf8 31 Bc5+ Kg7 32 Bd4 etc., Black's whole position crumbles away.

Page 1 1 3

Game 51 Alekhine's Defence