Uzs

iAi iif a mrnm^rn.

Preventing the useful knight manoeuvre £)f3-el-d3

19 b3 Be8

Bronstein gives White something to think about by intending to attack the e-pawn

20 h3 i.h5

21 WAS

Escaping the pin and defending the e-pawn

23 Bael Bbe7

Black has organised his forces well considenng his difficulties in the transition between opening and middlegame Nevertheless. White still has an initiative and. because Black had to bring pieces to cover the kingside, a better game on both sides of the board (Black's queen-side pawns are permanently weak)

A speculative advance which aims to break into Black's camp Now 24 fxe5 25 £>xe5 Axe5 26 fxe5 Sxe5 27 Bxe5 Sxe5 28 Ah6 gives White excellent compensation for the sacrificed pawn, eg 28 Ae2 29 *g3 Se8 30 Ad5+ ^8 31 Sf7 Alternatively 24 Axf3 25 £xf3 fxe5 26 f5,,? leaves Black very weak on the light squares, not forgetting White's much superior pieces Therefore Bronstein prefers to keep his position as stable as possible

25 exf6 Axf6

26 Hxe7 Hxe7

27 Eel

White considers that he can exchange all the rooks and still retain good attacking chances

29 Arc

White has good enough command of the light squares even without his king's bishop Black's problem now is his weak c-pawn, as White is about to realise the plan of transferring a knight to d3 Remember that Black interfered with this sortie with his 18th move

Improving the position of the queen and preparing to defend the c-pawn with a less powerful piece

33 Wb7 Sk8

35 a5 g5

Black tries to break out of his restraints, so White decides it is time to offer a trade of queens

38 cxd5 h6

Or 38 gxf4 39 Axf4, with the idea of Af4-c7-b6 Consequently Black prefers to keep the bishop locked out

40 fxg5 hxgS

40 Axg5 leaves the c-pawn undefended

Black resigned because either the c-pawn or the g-pawn (perhaps even both) will fall One threat is 42 £ie5+

Now an example of a much different treatment of this variation

Unfortunately for Black the arrival of an ending has not rid him of his defensive task 30 ... fe6

Gelman-Lastin

Russian Junior Championship 1996

1 e4 c6 2 d3 d5 3 £id2 g6 4 g3 Ag7 5 Ag2 e5 6 £>gf3 &e7 7 0-0 0-0 8 Set ^d7

For 8 d4 see the preceding game, Wojtkiewicz-Bronstein Alternative moves are a) 8 f6 defends the e5-pawn but cannot be as good as the text Ker-tesz-Heinbuch, Bonn 1995, continued 9 b3 d4 (Black pushes now that the thematic c2-c3 is no longer playable) 10 a4 a5 II £c4 c5 12 ©h4 and White threatened the king-side thrust f2-f4 without the prospect of Black carrying out the usual queenside expansion Consequently Black hit out with 12 gS

13 5M5 £lxf5 14 exf5 ¿xf5, resulting in a slight edge to White after 15 A.xb7 Xta7 16 Ag2 £la6 17 »0 Jie6 18 Wc6 with a gnp on the light squares, better pawn structure and the constant threat of f2-f4

b) 8 Wc7 covers e5 while keeping Black's options open bl) 9 HHe2 steps up the pressure on the e5-pawn Now after 9 d4 it is a matter of which queen, if any, is the better placed Black should not allow his queen to be exposed on the c-file following c2-c3xd4, while the white queen might see more action on c2 or b3 Otherwise Black simply brings another piece to the rescue with 9 £>d7, which was seen in Floegel-Bobzin, German League 1994 There followed 10 exd5 cxd5 (10 £ixd5 11 £lc4 favours White) 11 c4', and now pressing on with 11 d4 as in the main game loses a pawn to 12 £>xd4 due to the pin on the e-file Instead 11 dxc4 12 5ixc4 ¿hc6 13 ±d2 f6

14 Bad #b8 15 W> temporarily sacrificed a pawn in order to open the position, and Black was punished for weakening his kingside after 15 exd4 16 b4 £sde5 17 £>cxeS£>xe5 18£ixd4

b21) 9 a5 is aimed at dissuading White from staking a claim to the queenside with b2-b4, although 10 b4 is indeed a viable reply — see the note to White's 9th move There is also a slower, creeping form of expansion available to White 10 b3 b6 11 »c2 Bd8 12 iib2 ¿La6 13 d4> £)d7 14 a3 with an edge It is worth remembering what now happened in Oil-Wei Is, Antwerp 1996, where Black played 15 Bac8, walking into a pin after 16 Ah3 White should be on the lookout for this possibility b22) The main idea of tucking the queen on c7 is to facilitate the occupation of the d-file after an early pawn exchange in the centre. 9 dxe4 10 dxe4 3d8 11 <tc2 (D)

Although there is nothing terribly wrong with this simplistic plan, which is seen most often at club level, Black can look forward to no more than a cramped, defensive position requiring a certain amount of manouevrtng Despite the fact that most of the pieces stand on the same squares, White's extra move and superior knights (the e7-knight is misplaced) afford him persistent pressure In fact many players experience difficulty addressing the weak spot upon which much of the middlegame struggle is based — the d6-square In Glienke-Bilek, German League 1983, the experienced Bilek skilfully limited his opponent to a narrow lead 11 £ld7 12 a4 13 £ic4 Ae6 14 Afl ft 15 b3 £)c8' 16 Aa3 4id7 17Badl Nevertheless White's game is so much easier to conduct, as he can clamp down on the key d6-square with natural developing moves, and there is always the chance that Black is not up to the task of defending while simultaneously avoiding dangerous passivity.

9 exdS!

The ''' is given because the capture gives the variation a more lively flavour However, the traditional 9 b4 is fine 9 a5 (Black cannot really afford to ignore the pawn, eg 9 b6 10 Ab2d4 11 c3 dxc3 12 Axc3 Aa6 13 £)b3 0c7 14 d4 with an obvious advantage to White, Bronstein-Saidy, Tallinn 1973) Now in Damljanovic-Kosic. Novt Sad 1995 White came up with a worthy alternative to b4xa5, which has been virtually an automatic choice when these two pawns come into contact Instead he essayed 10 cV(D)

White) 13 a4 £)f8 14 b5 dxe4 15 dxe4 Ag4 16 h3 Axf3 17 £sxf3 cxb5 18 axb5 <£>e6 19 i.fl and Black had to be careful on the light squares In fact he eventually came unstuck on the a2-f7 diagonal

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