(1) Jussupow,A (2555) - Van der Wiel,J (2520) [A18]
Luzern ol (Men) Luzern (6), 1982



1.c4 Nf6 2.Nc3 e6 3.e4 d5 4.e5 Ne4 5.Nf3 Nc6 6.Be2 Be7 7.0-0 0-0 8.d4 b6 9.Be3 Nxc3 10.bxc3 dxc4 11.Bxc4 Na5 12.Bd3 Bb7 13.Nd2 The mobile chain of Pawns (c3+d4+e5) cuts the board in two parts, committing Black to play on the queenside and White on the Kingside. With his last move White begins the preparation for an attack. He clears the way for the Queen and transfers his Knight to a more active position

13...c5 14.Qg4
Compelling Black to weaken his Pawn cover in view of the threat 15.Bh6 gaining an exchange

[ 14.Qg4 g6 15.Bh6 ]

14...g6 15.Ne4 cxd4 16.cxd4 Nc6
The e4-Knight is very dangerous, therefore Black ought to exchange it immediately

17.Rfd1 Nb4 18.Bh6
With the black Pawn on g6 White's task is to use the weak squares f6 and h6 for strengthening his attack on the King

18...Re8 19.Bb5 Bc6 20.Bxc6 Nxc6 21.Rab1 Qd5 22.Qf4 Qd8

[ 22...Nxd4 Is not playable because of 23.Rxd4 Qxd4 24.Nf6+
; 22...Rad8 23.Nf6+ Bxf6 24.Qxf6 And there is no protection against checkmate]

23.Rb3 Rc8 24.h4
The purpose of this move is to undermine the g6-Pawn by means of h4-h5 at the appropriate moment

24...Rc7 25.Rf3

[ 25.d5! exd5 26.Rxd5 Qxd5 27.Nf6+ Bxf6 28.Qxf6 Qxe5 29.Re3 Qxf6 ]

25...Rf8 26.Bxf8 Qxf8 27.d5 exd5 28.Rxd5 Nb4 29.Rd1 Rc6 30.Nd6 Nxa2 31.Qa4

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