White:Susan Lalic
Black: Ulrike Heymann

Round 6
Closed Sicilian B26
Notes by Susan Lalic

1 e4 c5 2 Nc3 Nc6 3 g3 g6 4 Bg2 Bg7 5 d3 d6 6 Be3 e6 7 Qd2 Rb8 8 Nf3
White plans d4. The alternative 8 Nge2 (also with the idea of d4) is well met by ...Nd4, but after 8 Nf3, Black should prefer 8...e5, due to the following trick: 8...Nd4?! 9 Bxd4 cxd4 10 Nb5! Ne7. Now the point of 8 Nf3 is clear as 10...Qb6 11 Qb4 Ke7 12 e5 wins a pawn.
8...Nd4?! 9 Bxd4 cxd4 10 Nb5! Ne7 11 Nbxd4 Nc6 12 c3 Qb6 13 Ne2 0-0 14 0-0 a5
Although White is a pawn ahead, she must be careful not to open the position too quickly as Black has some compensation in the bishop pair.
15 d4 a4 16 Rab1 Na5 17 b3 axb3 18 axb3 Bd7
Not 18...Nxb3, after which 19 Qc2! wins a piece.
19 c4 Ra8 20 Rfd1 Qa6 21 Nc3 Rfc8 22 Bf1 Qa7 23 Qf4 b5
I expected 23...Qb8, when 24 e5 is pleasant for White, although after 24...d5 24 c5 there is still a bit of work to do. The text starts tactics that end up highlighting the fact that the knight on a5 is offside.
24 Nxb5 Bxb5 25 cxb5 Rc3 DIAG 5 26 Ra1 Rxb3 27 Nd2 e5 28 Qg4 Rb4 29 Nc4 Rxc4
29...Rxb5 30 Nxd6 is great for White.
30 Bxc4 exd4 31 Bd5 Rb8 32 Qf4 Qb6
32...Rxb5 33 Qxd6 d3 34 Qd8+ Bf8 35 Rxd3 is also winning for White.
33 Qxf7+ Kh8 34 Rdc1 d3 35 Rc7 Qd4 36 Qxg7+ Qxg7 37 Rxg7 Kxg7 38 Rxa5 1-0