<div class='user_solution'><span class="MsoNormal" style="text-align:justify;display:block;"><b>1.Nd3! </b></span> <span class="MsoNormal" style="text-align:justify;display:block;">1.Rg4+? Kf1 2.Nd3 Be2 3.Kc2 f2÷</span> <span class="MsoNormal" style="text-align:justify;display:block;"> </span> <span class="MsoNormal" style="text-align:justify;display:block;"><b>1...Be2 2.Kc2! </b></span> <span class="MsoNormal" style="text-align:justify;display:block;">2.Kc3? e5 3.Rf6 e4 4.Nf4 e3=</span> <span class="MsoNormal" style="text-align:justify;display:block;"> </span> <span class="MsoNormal" style="text-align:justify;display:block;"><b>2...e5 3.Rg4+ Kf1 4.Nxe5! </b></span> <span class="MsoNormal" style="text-align:justify;display:block;">4.Re4? f2 5.Rxe5 Bf3! 6.Kd2 Kg1 7.Rg5+ Bg2!=</span> <span class="MsoNormal" style="text-align:justify;display:block;"> </span> <span class="MsoNormal" style="text-align:justify;display:block;"><b>4...f2 5.Rg7! </b></span> <span class="MsoNormal" style="text-align:justify;display:block;">5.Rg8? Ke1 6.Re8 Bb5!=</span> <span class="MsoNormal" style="text-align:justify;display:block;"> </span> <span class="MsoNormal" style="text-align:justify;display:block;"><b>5...Ke1 6.Re7 f1Q </b></span> <span class="MsoNormal" style="text-align:justify;display:block;">6...a5 7.Nd3+ Kf1 8.Kd2 Bxd3 9.Kxd3 a4 10.Ke3 Ke1 11.Kf3+ Kd2 12.Kxf2 Kc3 13.Ra7 Kb3 14.Ke2 a3 15.Kd2 a2 16.Kc1+-</span> <span class="MsoNormal" style="text-align:justify;display:block;">6...Bd1+ 7.Kc1 Bh5 8.Nf3+ Kf1 9.Nd2+ Kg2 10.Rg7+ Kh3 11.Rh7+-</span> <span class="MsoNormal" style="text-align:justify;display:block;"> </span> <span class="MsoNormal" style="text-align:justify;display:block;"><b>7.Nd3# </b></span> <span class="MsoNormal" style="text-align:justify;display:block;"> </span> <br /></div>