Position after 18 ... Rad8.
The fight over e4 is balanced: White has three
defending pieces versus Black's three attackers.
Both sides can bring an extra man to bear on the
focal point: Re1 versus ... Re7 and ... Rde8.
White would dominate the center if he were able
to centralize the a1 rook as well. But, since
it's tied down to protecting the weak a5 pawn,
he cannot entertain such ambitions.
19 Rfc1 Nd7 20 Na2 Nxa2.
19 Bh1 Nd7 20 Bf3 Re6 21 Be3 Rde8 22 Rfd1.
19 Rfe1 Nd7 20 Be3 Nf8 21 Nd5 Bxd5 22 exd5 Bxb2
23 Rab1.
19 Rfc1.
19 Rfd1 Qc8 20 Rab1 Qc7 21 Ra1.
19 Rfe1 Nd7 20 Nd5 Nxd5 21 exd5 Bb5 22 c3 Rxe1+
23 Rxe1 Qxa5 24 Be4.
19 Rfc1 Kh8 20 Re1 Ng8 21 Nd1.
19 Rfd1 Kh8 20 Re1 Nd7 21 Be3 Kg8 22 Bf2 Kh7 23 Be3.
19 Rfe1 Nd7 20 Nd5 Nxd5 21 exd5 Bb5 22 Rab1 Rb8
23 Ne4 Bc4 24 c3.
19 Rfd1 Kh8 20 Re1 Kg8 21 Rec1 Kh8 22 Re1.
19 Rfe1 Nd7 20 Nd5 Nxd5 21 exd5 Bb5 22 Rab1 Rb8
23 Ne4 Nf6 24 Nxf6+ Bxf6 25 f5.
19 Rfc1 d5 20 e5 Nd7 21 Na4 d4 22 Ne4 f6
23 Nexc5 Nxc5 24 Nxc5 Bxg2 25 Qxb4 Bxh3 26 Qb3+.
19 Rfd1 Kh8 20 Re1 Kg8 21 Rec1 Kh8 22 Re1.
19 Rfe1 Nd7 20 Nd5 Nxd5 21 exd5 Bb5 22 Rab1 Rb8
23 Ne4 Nf6 24 Nxf6+ Bxf6 25 f5.
19 Rfc1 d5 20 e5 Nd7 21 Na4 d4 22 Ne4 f6
23 Nexc5 Nxc5 24 Nxc5 Bxg2 25 Qxb4 Bxh3 26 Qb3+.
19 Rfb1 d5.
19 Rfe1 Nd7 20 Nce2 Bb5 21 Nd4 Nc6 22 Nxb5 axb5
23 Ne2 b4 24 c3 bxc3 25 bxc3 Nf6 26 Bh4.
19 Rfd1 Kh8 20 Re1 Kg8 21 Rec1 d5 22 e5 Nd7
23 Na4 d4 24 Ne4 f6 25 Nexc5 Nxc5 26 Nxc5 Bxg2
27 Qxb4 Bxh3 28 Qb3+.
19 Rfe1 Kh7 20 Ra3 Kg8 21 Nd1 Bb5 22 Nc3 Bc6.
19 Bh1 Nd7 20 Rfe1 Rc8 21 Bg2 Kh8 22 Red1 Rcd8.
19 Rfd1 Kh8 20 Re1 Kg8 21 Rec1 d5 22 e5 Nd7
23 Na4 d4 24 Ne4 f6 25 Nexc5 Nxc5 26 Nxc5 Bxg2
27 Qxb4 Bxh3 28 Qb3+.
19 Rfe1 Kh7 20 Ra3 Qd7 21 Nd1 Bb5 22 Ne3 Qc7
23 g5 hxg5 24 fxg5 Nd7 25 c3 Nd3.
19 Bh1 Nd7 20 Rfe1 Nf8 21 Nd5 Nxd5 22 exd5 Bb5
23 Rab1 Nd7 24 Bg2 Rc8 25 Ne4 Nf6 26 Nxf6+.
19 Nd5 Nbxd5 20 exd5 Bb5 21 Rfe1 Nd7 22 Rab1 Rc8
23 Ne4 Nf6 24 Nxf6+ Bxf6 25 f5 g5 26 Qe2.
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