<div class='user_solution'><font face="Arial" size="3"><b>1.Nd4 </b>[1.Kxg3? Rxb2 2.Nd4 Ra2 3.Nc6 Kf6–+] <b>1...Rxb2 2.Ne6+ Kf6 </b>or Kg6 <b>3.Nc5! </b>[3.Nc7? Rb3! 4.Nxa6 Kf5 5.Nc7 Rc3! 6.Nd5 Rc5! 7.Nb4 Rb5! 8.Nc2 <i>(8.Nd3 Rxa5–+) </i>8...Kf4–+] <b>3...Rb5 4.Nxa6 Rxa5 5.Nb4 Ra3 6.Nc2 Rc3 7.Nd4 </b>switchback <b>7...Kg5 </b>[7...Ke5 8.Ne2 Re3 9.Ng1 Kf4 10.Kh4 as main] <b>8.Ne6+! </b>switchback [8.Ne2? Re3 9.Ng1 Ra3 10.Nf3+ Kf4 11.Ng1 Ra2 12.Nf3 Ra1–+] <b>8...Kf5 9.Nd4+ </b>switchback <b>9...Ke4 10.Ne2 Re3 11.Ng1 </b>[11.Nxg3+? Kf4–+] <b>11...Kf4 </b>[11...Re1 12.Nf3=] <b>12.Kh4 </b>[12.Nf3? Rxf3 13.gxf3 Kxf3–+] <b>12...Kf5 </b>[12...Re1 13.Nh3+ Kf5 14.Kxg3=] <b>13.Nh3 </b>[13.Nf3? Rxf3–+] <b>13...Ra3 14.Ng1 Re3 15.Nh3 positional draw</b>.</font><div><font face="Arial" size="3"><br /></font></div><div><font face="Arial" size="3">Long trip of knight: f3-d4-e6-c5-a6-b4-c2-d4-e6-d4-e2-g1–h3-g1–h3.</font></div><br /></div>