almost permanently fixed, but it is the surviving d4-pawn which contributes to White's advantage by monitoring the e5-square. Already a knight and a pawn guard over the critical square, and with the rook coming to the e-file and Ac l-f4 in the pipeline White can look forward to a pleasant middlegame. Note that ...f7-f6 covers e5 but creates another target on e6, and contesting the e-file means moving the e7-knight, which means neglecting the d5-pawn. Gormally-Zagorskis, Poli-tiken Cup 1998, continued 10 c3 Af5 11 Bel 0-0 12 £lf 1 h6 13 h4 (if Black wants to play ..g6-g5 it will require some sort of concession and, as we know, h2-h4 is useful in related positions) 13...Se8 14 Af4 ^7 15 ?ie5! and the significance of the e5-square came into play. After I5...£lxe5 16 Axe5 Black refused to part with a piece which might soon be needed for defensive purposes, forcing back the enemy bishop in the process. 16...f6 17 Af4 g5 18 hxg5 hxg5 19 Ad2. Then l9...Ag4 invited the exchange of another pair of minor pieces, a trade which allowed White to cany out an unexpected attacking manoeuvre: 20 Af3 Axf3 21 lfxf3 g4 22 TiThl (D)

I should point out — not for the tlist tune — what a difference the traditional h2-h4 and the subsequent exchange on g5 made to Black's defensive task 22 f5 23 Wh5 2f8 24 A.g5 Eae8 25 £ie3 (here is another inconvenience for Black — finding a new post on e3 tor the d2-knight hits d5. f5 and g4) 25 £k8 26 <&g2 217 27 ¿h6 Axh6 28 lfxh6 SefB 29 2h I 2g7 30 Sh5 The invasion is decisive 30 £ie7 31 2g5 2ff7 32 Shi sbffi 33 Exg7 2xg7 34 *»6+ &g8 (34 Sf7 35 Eh8+ £>g8 36 ®g6 2g7 37 lfxf5+) 35 2h5 Wc6 36 1tfe5 Material is level but Black is without hope 1-0

10 v^b3 lfb6

Black could also hang on to his front d-pawn by playing 10 Ag4, although 11 h3 ¿Uf3 12 ttfxf3 gives White good compensation His next moves will be Eel i.f4 (or Ag5) and Ead 1

Dvoretsky himself gives 11 ¿.14 intending £d6-c5 — as a possible improvement Then II d3 12 c3 ¿t5 13 2el 0-0 14 £)h4 ¿.e6 15 Wxd3 is comfortable tor White Black should continue with his development and meet 11 Af4 with 11 &f5 After the planned 12 iLd6 0-0 13 Eel1 Bte8 (or 13 Ae4 14 £<.5 *c7 15 ixe7 ^xe7 16 £jfxd4 .£.xg2 17 &xg2, favouring White)

14 Ac5 *c7 15 Jlxd4 White's firm control of the d4-square helps him play against (he isolated pawn

The less incisive game move works out well, but Black has better than his next in II 0-0 12 £ifxd4 £}f5', effectively neutralising White's edge (eg 13 £>xf5 Axf5 14 ¿xd5 Axb2) Note that the string of captures beginning with 12 £ixd4 favours White 13 &xe7 £ixb3 14 AxfB &xal 15 Axg7 &xg7 16Wxal

White seems prepared to go to any lengths in order to seize control of d4 As for Black, his stranded king is the source of his coming tactical problems

An imaginative positional sacrifice which tests the Black defences. 14 c3 was tempting, with the idea of

14 dxc3 15 Wxd5', but 14 £ie4 cuts across White's plan

a4, tying Black up

15 £ixd4 Wxd4

The best continuation, as

15 4lxd4 16 Af6 leaves Black in a dismal position

ill iirtl i

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