<div class='user_solution'><span style="text-align:justify;display:block;" class="MsoNormal"><b><span lang="ES">1.Kb5 </span></b><span lang="ES">[1.e6? Nc1 2.Ne5 g2 3.e7 e1Q 4.Nf3+ Kh3 5.Nxe1 g1Q 6.e8Q Qxg5=] <b>1...Nd4+ </b>[1...g2 2.Bf4+ Kg1 3.a6 Nd4+ 4.Kc4 Ne6 5.a7 Nxf4 6.Nxg2 Nxd3 7.a8Q Nxe5+ 8.Kb5 Bg3 9.Ne3 e1N 10.Qa2+-] <b>2.Kc4 Nf3 </b>[2...Ne6 3.Ng4+ Kg2 4.Be3 Bxe3 5.Nxe3+ Kf3 6.Nc2 Ke4 7.Nce1+-] <b>3.Bf4 </b>[3.e6? Nxg5 4.e7 Ne4 5.Ng4+ Kg1 6.Kd5 Nc5 7.Nge5 g2 8.e8Q Kf1 9.Nxf2 e1Q 10.Qb5+ Qe2 11.Qxe2+ Kxe2 12.Nh3 Na6=] <b>3...g5 4.Ng4+ Kh3 5.Ngxf2/dxf2+ gxf2 6.Nxf2+ Kh4 7.Nd3 gxf4 8.Nxf4 e1Q 9.Ng2++- </b></span></span></div>