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Threatening a future £lc3-b5 and watching over d5

16 a4 Ac6 Tempting White into what he anyway intended, and thus effectively losing a tempo 16 £id4 or

16 2fd8 are less compromising

17 &b5 Axb5

18 axb5 £lxc4

On studying the diagram position we see that White has reaped several benefits from his imaginative knight manoeuvres Black's a-pawn is a chronic weakness against which Petrosian can build up pressure at will White's king's bishop is excellently placed, and the absence of its black counterpart accentuates the domination of the white squares — notably the long diagonal

20 c3 2fe8

21 2a6 2e7

Black gets ready to defend his a-pawn

22 tta4 Bc8

Or 23 £ki8 24 ¿Lg5 2d7 25 Ac6 when Black's position is over-loaded

24 Axe6!

Now Black will either lose his a-pawn or have to spoil his pawn structure Against a positional player of Petrosian's calibre perhaps the former is the lesser evil, but Donner is in material mood

25 ttdl! Sd8

White has more than one target to aim at

28 h5 gxh5

29 WxhS 218

30 Wg4 2f6

Petrosian suggested 30 2f5 followed by h7-h5

31 Ae3 2g6

32 We4

33 2aal

The queen's rook has no further role to play on the a-file

34 Bedl 2gg7

36 2xd7 2xd7

38 *h3 if6

Otherwise Black loses a pawn

Now 39 ®h5 is the most accurate continuation, threatening 40 Ag5+ and 41 Ah6+

39 2fl We8

40 Hrh4+ ig7

41 Ah6+ ig8

42 Axf8

Without his bishop Black will have problems defending the e5-pawn Recapturing with the queen does not help, e g 42 HfxfTi

43 2el TtH

44 2xe5 Wg6

46 2e4!

Apart from being a pawn down. Black has other weak pawns and no shelter for his king The game finished

47 2f4 We7

49 We5 ic8

White threatened 50 Wb8 mate

50 We4

Threatening 51 Wa8+ <ttc7 52 #xa7+

51 2h4 Iff?

To defend the e-pawn with

2d7-e7

52 2f4 Wei

53 ff3 Wd6

54 2f8+ 2d8

If 54 <&c7 55*a8wins

55 2r6

Black resigned as 55 2d7 56 1i'e4 2e7 (the e-pawn must be defended) 57 2f8+ i'c7 58 Wa8 leads to mate 1-0

Hillarp Persson-Hector

Gothenherg 199 7

Another uncompromising reply to White's opening move is 1 f5,? which invites a direct transposition to the Dutch Defence after d2-d4 There is also 2 e4''>, although you can guarantee that Black will be well prepared for this Fortunately for KIA fans the fianchetto is possible here, too 2 g3 <Sf6 3 ¿Lg2 and now it is time for Black to select the variation a) 3...g6 4 0-0 Ag7 5 d3 0-0 6 e4

White exploits the opening of the a2-g8 diagonal resulting from 1 f5 The point is that the preparatory £sbl-d2 is not necessary because the e-pawn is immune — 6 fxe4 7 dxe4 <£sxe4? 8 Wd5+ etc Consequently White both saves a tempo and affords himself more flexibility in terms of queenside development 6 d6 with al) 7 £}c3 fxe4 (7 £ic6 8 exf5 Axf5 9 d4 £>b4 10 Qel c6 11 £ie2 e5 12 c3 was even in Rashkovsky-Bareev, Moscow 1989) 8 dxe4 e5 9 h3 £>bd7 10 ie3 Barczay-Zsu Polgar, Lillafured 1989, the game is balanced a2) 7 c3 <Sc6 8 exf5 gxf5 (8 ¿xf5 9 Wb3+ picks up the b7-pawn) 9 Wb3+ e6, e g 10 2el h6 II £)a3 *h7 12 Wa4 ¿Ld7 13 tfh4 e5 with an interesting position, Martin-Karolyi, Oakham 1993

b) 3 e6 4 0-0 kt7 5 d3 0-0 6 £>bd2 d6 7 e4 fxe4 8 dxe4 e5 9 c3 We8 is pretty standard stuff Vaisser-Ochoa, Palma de Mallorca 1989, continued 10 5ic6 11 £>c4 fh5 12 #xh5 £)xh5 13 £>f5< Ad8 14 a4 <Sf6 15 £)fe3 Ae6 16 b4 (D)

The pawn structure is typical for this variation, with the e4-pawn playing an important role Without any effective pawn breaks available White stands slightly better thanks to his advanced, mobile queenside pawns Although the KJA setup does not exactly scare Black, it does have the bonus of steering the game away from the traditional Dutch positions which see Black obtaining counterplay by concentrating on the vulnerable e4-square (after d2-d4) By choosing to erect a centre based on d3 and e4 (instead of c4 and d4) White gives his opponent less to bite on in return for a little less space

2 g3

Keeping a KIA flavour 2 e4 and 2 d4 are more direct

3 d3 dS

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