25 AUGUST 1990, Page 36

CHESS

Dutch treat

Raymond Keene

The Soviet Grandmaster Alexander Be- liaysky has just celebrated one of the most significant tournament successes of his illustrious career. His victory in Amster- dam came ahead of such great players as Lajos Portisch and Viktor Korchnoi and our own John Nunn. It is interesting that Beliaysky has agreed to support Kasparov as his second during the coming world championship match in place of the former stalwart of the world champion's advisory team, Josef Dorfman.

Nunn — Beliaysky: OHRA, Amsterdam 1990; Ruy Lopez.

1 e4 e5 2 N13 Nc6 3 Bb5 a6 4 Ba4 Nf6 5 0-0 b5 6 Bb3 Bbl 7 c3 Nxe4 8 d4 Na5 9 Bc2 exd4 10 b4 For some time this was thought to put the variation out of commission but Beliaysky has a new idea to revive it. 10 . . . Nc4 11 Bxe4 Bxe4 12 Rel d5 13 Nxd4 c5 This is Beliaysky's new move. Previously 13 . . . Bd6 14 f3 Qh4 15 h3 Qg3 had been tried, but the move 16 Nf5! delaying acceptance of the sacrifice is good for White. 14 bxc5 BxcS 15 f3 If White does not try to win a piece in this fashion, he clearly has nothing. 15 . . . 0-0 16 fxe4 dxe4 Black evidently has great compensation for his sacrificed piece. If for example 17 Rxe4 then 17 . . . b4 undermines the Position after 21 . . . c2 stability of White's knight on d4. 17 Khl Re8 18 Be3 Nxe3 19 Rxe3 b4 20 Nd2 bxc3 21 N2b3 c2 (Diagram) An excellent move which White may well have underestimated. If 22 Qxc2 Bxd4 23 Rdl Qg5 24 Rg3 refutes the Black attack. However instead of 23 . . . Qg5 Black wins with 23 . . . Bxe3 24 Rxd8 Raxd8 with an overwhelm- ing position. 22 Qd2 Bb6 23 Rc3 e3 24 Rxe3 Rxe3 25 Qxe3 a5 26 a4 Qd7 27 Rd Qxa4 28 Rxc2 Qb4 29 Rd2 a4 30 Ncl a3 31 h3 Qbl 32 Qgl Rd8 33 Ncb3 a2 34 Rdl Qb2 35 Qel g6 36 Qe7 Qc3 37 Rfl Qc4 38 Qf6 Rxd4 39 Nxd4 Bxd4 40 Qf4 Qxfl+ White resigns. A superb demonstration of the power of the pin against one of the world's leading exponents of White initiative.

Beliaysky — Portisch: OHRA, Amsterdam 1990; Nimzo-Indian Defence.

1 d4 Nf6 2 c4 e6 3 Nc3 Bb4 4 f3 d5 5 a3 Bxc3+ 5 . . . Bel is a reliable alternative. 6 bxc3 c5 7 cxd5 NxdS 8 dxc5 f5 Timman-Karpov, Candidates final 1990, saw 8 . . . Qa5 9 e4 Ne7 10 Be3 0-0 11 Qb3 Qc7 12 Bb5 Nec6 13 Rdl Na5 which led to a draw in 61 moves. 9 Nh3 This whole opening line is considered somewhat risky for White because his pawn structure is loose. 9 . . . 0-0 10 c4 Qh4+ 11 Nf2 Qf6 If 11 . . . Qxc4 12 e4 wins a piece. 12 Bd2 Nc3 13'Qc1 Na4 14 Bg5 Qf7 15 Nd3 Nd7 16 Qe3 White's opening play is artificial and he is reduced to amazing contortions to defend his extra pawn on c5. Nevertheless, he is obliged to cling to this pawn, otherwise Black would

OHRA Tournament, Amsterdam

1 1 2 2 3 3 4 4 5 5 6 6 Ttl

1 Beliaysky X X 1 1 1/2 0 1/2 1/2 1 1/2 1/2 1 61/2 2 Portisch 0 0 X X/ 1 1 1/2 1/2 1h 1/2 1 51/2 3 Korchnoi 1/21 1/20XX1/20 1/211/21/25 4 Azmaiparashvili 1/21/2 0/ 1/2 1 X X 0 1/2 1/2 1/2 41/2 5 Nunn 0 1/2 V21/2 1/2 0 1 1/2 X X 1/21/241/2 6 van der Wiel 1/2 0 1/2 0 1/2 I/2 1/2 1/2 1/2 1/2 X X 4 have absolutely no problems. 16 . . . e5 Trying to cut the Gordian knot. 17 c6 bxc6 18 Nxe5 NxeS 19 Qxe5 Re8 20 Qa5 Nb6 21 e3 h6 22 Bf4 Be6 If Black plays 22 . . . g5, White replies 23 Be5. However it is possible that the immediate 22 . . . Nxc4 would be an improvement. 23 Kf2 Bxc4 24 h4 Rad8 25 Rcl Bxfl 26 Rhxfl Nd5 27 Rxc6 Qh5 28 Rhl 28 . . . Nxf4 would make it difficult for White to win since White's extra pawn is doubled. 28 . . . Rd7 29 Qa4 Red8 30 Qc4 Kh7 31 Be5 Nb6 32 Qcl Rd2+ 33 Kg3 Q17 34 h5 Qe7 35 Bf4 R2d7 36 Qc2 Qf7 37 e4 (Diagram) This unpretentious move leads to a

Position after 37 e4 surprisingly swift denouement. By blasting open diagonals towards the black king Beliaysky succeeds in demolishing the pawn shelter in that area. 37 . . . fxe4 38 Qxe4+ Kh8 39 Be5 Kg8 40 Rg6 Black resigns.

A major step in the implementation of glasnost has been the decision by the Soviet government last week to restore Korchnoi's Soviet citizenship to him. There may well come a time, in the not so distant future, when we may see Viktor Korchnoi with dual Swiss/Soviet national- ity playing once again in Moscow.