Lujan,C (2379) - Bacallao Alonso,Y (2580)
Philidor 3.d4 exd4 4.Nxd4 Nf6 5.Nc3 Be7[C41]
7th Americas Continental 2012 Mar del Plata ARG (3.6), 14.10.2012
1.e4 e5 2.Nf3 d6 3.d4 exd4 4.Nxd4 Nf6 5.Nc3 Be7 The Antoshin Variation. Black adopts a solid formation with the bishop passively placed on e7.[Yip] 6.Bf4 The critical line.[Yip] 6...0–0 7.Qd2 Nc6 8.0–0–0 Nxd4 9.Qxd4 a6 10.e5 dxe5 11.Qxd8 Bxd8 12.Bxe5 The ending is even.[Yip]12...Re8 13.f3 To restrict Nf6.[Yip] 13...b5 14.Bg3 Bb7 15.Bd3 c5 Beginning active counterplay.[Yip] 16.Rhe1 Ba5 17.Rxe8+ Rxe8 18.Bh4 c4 19.Bf5 Re5 20.Bxf6 gxf6
Black has the bishop pair and active pieces in return for the compromised pawn structure.[Yip]21.Be4 Bc8 22.Rd5 h5 23.Rxe5 fxe5 24.Nd5 Bd8!? The bishop retreats to restrict the knight.[Yip] 25.f4 exf4 26.Nxf4 h4 27.c3 Kg7 The king now takes an active role.[Yip] 28.Kd2 Kf6 29.Ke3 Ke5
30.Ba8 Bg4 The bishops begin to dominate white's B+N and black is slightly better.[Yip] 31.g3 Bb6+ 32.Kd2 Bg1= [Yip] [32...Bc8³ Keeps a slight advantage.[Yip]] 33.Ne2 Bxh2 34.gxh4 f5 35.Bb7 a5 36.Ba6 Kd5 37.Bxb5 Be5 38.Ke3 Bf6 39.Nf4+ Kc5 40.Ba6 Bxh4 41.Ne6+ Kd5 42.Nf4+ Kd6 43.Ng2 Bg5+ 44.Kf2 f4 45.Bxc4 f3 46.Ne3 Bh4+ 47.Kg1 Bd7 48.a4 Ke5 49.Bb5 Be6 50.b4 Kf4 51.Nf1 axb4 52.cxb4 .Be1 53.a5 Bd5 54.Kh2 Bxb4 55.a6 Bd6 56.Kg1?–+
[56.Kh3 Was better.[Yip]] 56...Bc5+ 57.Kh2 Kg4 58.Nd2 f2 59.Be2+ Kh4 Diagram
Now white is suddenly caught in a mating net.[Yip]60.Bf3 [60.Nc4 Ba7 61.Nd6 Bb8 62.Bf3 f1Q 63.Bxd5 Bxd6# [Yip]] 60...f1Q 61.Nxf1 Bxf3 62.Nd2 Bd5 63.a7 Bxa7 64.Nf1 Be6 65.Nd2 Be3 66.Nf3+ Kg4 67.Ne5+ Kf4 68.Nc6 Bc5 69.Nb8 Ke5 70.Nc6+ Kd6 71.Nd8 Bd5 0–1
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