<div class='user_solution'><span class="MsoNormal" style="text-align:justify;display:block;"><b><u><span>1.Nc5</span></u></b><b><span>! </span></b></span> <span class="MsoNormal" style="text-align:justify;display:block;"><b><span>Try :</span></b><span> 1.c5? bxa3!</span></span> <span class="MsoNormal" style="text-align:justify;display:block;"><span> </span></span> <span class="MsoNormal" style="text-align:justify;display:block;"><b><u><span>1...Qxc2 2.Ne6+ Kf5 3.Ng7+ Kf4 4.Nxh5+ Kf5 5.e4+ Ke6 6.Rg6</span></u></b><b><span>+ </span></b></span> <span class="MsoNormal" style="text-align:justify;display:block;"><b><span>Try :</span></b><span> 6.Rg7? Qh2!</span></span> <span class="MsoNormal" style="text-align:justify;display:block;"><span> </span></span> <span class="MsoNormal" style="text-align:justify;display:block;"><b><u><span>6...Ke7</span></u></b><b><span> </span></b></span> <span class="MsoNormal" style="text-align:justify;display:block;"><span>not 6...Kd7? 7.Nf6+ Ke6 8.Ng4+ Kf7 9.Ne5+ Ke8 10.Bc5 mate in 12 moves</span></span> <span class="MsoNormal" style="text-align:justify;display:block;"><span> </span></span> <span class="MsoNormal" style="text-align:justify;display:block;"><b><u><span>7.Bc5</span></u></b><b><span>+! </span></b></span> <span class="MsoNormal" style="text-align:justify;display:block;"><span>7.Rg7+? Kd8! 8.Nf6 Qxd3! mate in 14 moves; or 7.Kc6? Qc3! mate in 14 moves</span></span> <span class="MsoNormal" style="text-align:justify;display:block;"><span> </span></span> <span class="MsoNormal" style="text-align:justify;display:block;"><b><u><span>7...Ke8 8.Rg8</span></u></b><b><span>+! </span></b></span> <span class="MsoNormal" style="text-align:justify;display:block;"><b><span>Try :</span></b><span> 8.Kc6? Qb2/c3!</span></span> <span class="MsoNormal" style="text-align:justify;display:block;"><span> </span></span> <span class="MsoNormal" style="text-align:justify;display:block;"><b><u><span>8...Kd7 9.Rg7+ Kc8</span></u></b><b><span> </span></b></span> <span class="MsoNormal" style="text-align:justify;display:block;"><span>not 9...Kd8? 10.Nf6 mate in 12 moves</span></span> <span class="MsoNormal" style="text-align:justify;display:block;"><span> </span></span> <span class="MsoNormal" style="text-align:justify;display:block;"><b><u><span>10.Rc7</span></u></b><b><span>+! </span></b><b><span>with two lines</span></b><span> </span></span> <span class="MsoNormal" style="text-align:justify;display:block;"><span> </span></span> <span class="MsoNormal" style="text-align:justify;display:block;"><b><span style="font-size: 14pt;">A)</span></b><span> <b><u>10...Kb8 11.Re7 Kc8 12.Re8+ Kd7 13.Nf6</u>#</b></span></span> <span class="MsoNormal" style="text-align:justify;display:block;"><span><span>       </span><b><u>11.......Qxd3 12.Re8 Qd8 13.Rxd8</u></b>#</span></span> <span class="MsoNormal" style="text-align:justify;display:block;"><span> </span></span> <span class="MsoNormal" style="text-align:justify;display:block;"><b><span style="font-size: 14pt;">B)</span></b><span> <b><u>10...Kd8 11.Ng7</u></b>! </span></span> <span class="MsoNormal" style="text-align:justify;display:block;"><b><span>Tries </span></b><span>: <i>11.Nf6? Qf2! </i>or<i>; 11.Nf4? Qxc4!) </i></span></span> <span class="MsoNormal" style="text-align:justify;display:block;"><i><span> </span></i></span> <span class="MsoNormal" style="text-align:justify;display:block;"><b><u><span>11...Qf2 12.Ne6+ Ke8 13.Re7</span></u></b><b><span># </span></b></span> <span class="MsoNormal" style="text-align:justify;display:block;"><b><span> </span></b></span> <span class="MsoNormal" style="text-align:justify;display:block;"><b><span> </span></b></span> <span class="MsoNormal" style="text-align:justify;display:block;"><span style="font-size: 10pt; font-family: &quot;FigurineCB AriesSP&quot;;"> </span></span></div>