<div class='user_solution'><font face="Arial" size="3"><b>1.Ra6! </b>[1.Ra5? Nc2+ 2.Kxd3 Nb4+ 3.Kc3 Nxc6 4.Rxa2 Ne5! 5.Rf2 <i>(5.Kd4 Nc6+!=) </i>5...Ng4 6.Rf4 Nh2 7.Kd3 Ke1 8.Ke3 Nf1+=; 1.Rc1+? Kd2 2.Ke4 Nc2 3.Rh1 a1Q 4.Rxa1 Nxa1=] <b>1...Nc2+ 2.Kxd3 Nb4+ 3.Kc4 Nxa6 4.Ra5 Nc7 </b>[4...Nb8 5.Rxa2 Nc6 6.Rf2 Ne5+ 7.Kd4 Nc6+ 8.Kc3 Ne5 9.Rf4+-] <b>5.Rxa2 Ne6 6.Rf2! Ng5 </b>[6...Ke1 7.Rf5 Kd2 8.Kd5 Nc7+ 9.Kc5+-] <b>7.Rf5 Nh3 8.Rf3 Ng5 9.Re3! Kd2 10.Kd4 </b>zz <b>and wins</b>, for example 10...Nf7 11.Rg3 Nd6 12. Rg5 Kc2 13.Rd5 Nf7 14.Ke4 Nh6 15.K</font><font size="3">f4 Kc3 16.Rd7 Ng8 17.Rg7 Nh6 18.Kg5 +-</font></div>