<div class='user_solution'><span class="MsoNormal" style="text-align:justify;display:block;"><b><span style="font-size: 12pt; font-family: &quot;Times New Roman&quot;, serif;">1.Rb7! Qxf5! 2.exf5 e1Q 3.Nef6+! </span></b></span> <span class="MsoNormal" style="text-align:justify;display:block;"><span style="font-size: 12pt; font-family: &quot;Times New Roman&quot;, serif;">3.Ndf6+? Kf8 4.Ng7 Qh4+ 5.Kg6 Qg3+ 6.Kh5 Qxg7 7.Rxg7 Kxg7 8.Ne8+ Kf8 9.gxh3 Kxe8 10.b4 Nd3 11.b5 Kf7 12.b6 Nc5 =</span></span> <span class="MsoNormal" style="text-align:justify;display:block;"><span style="font-size: 12pt; font-family: &quot;Times New Roman&quot;, serif;"> </span></span> <span class="MsoNormal" style="text-align:justify;display:block;"><b><span style="font-size: 12pt; font-family: &quot;Times New Roman&quot;, serif;">3...Kf7 4.Ne5+ </span></b></span> <span class="MsoNormal" style="text-align:justify;display:block;"><span style="font-size: 12pt; font-family: &quot;Times New Roman&quot;, serif;">4.Nh5? Ke8=</span></span> <span class="MsoNormal" style="text-align:justify;display:block;"><span style="font-size: 12pt; font-family: &quot;Times New Roman&quot;, serif;"> </span></span> <span class="MsoNormal" style="text-align:justify;display:block;"><b><span style="font-size: 12pt; font-family: &quot;Times New Roman&quot;, serif;">4...Kxf6 5.Rf7+ Kxe5 6.Re7+ Kf6 </span></b><span style="font-size: 12pt; font-family: &quot;Times New Roman&quot;, serif;">! <b>7.Rxe1 Nd3 8.Rg1 h2 9.Rf1 Nf2 10.b4 h1Q+ 11.Rxh1 Nxh1 12.g4 Nf2 13.Kh5 Nh3 14.b5 Nf4+ 15.Kh6 Nd5 16.Kh7 Nb6 17.Kh8! </b></span></span> <span class="MsoNormal" style="text-align:justify;display:block;"><span style="font-size: 12pt; font-family: &quot;Times New Roman&quot;, serif;">try : 17.Kg8? Nd7 Zugzwang for White 18.Kh7 Kg5! 19.Kg7 Kxg4 =</span></span> <span class="MsoNormal" style="text-align:justify;display:block;"><span style="font-size: 12pt; font-family: &quot;Times New Roman&quot;, serif;"> </span></span> <span class="MsoNormal" style="text-align:justify;display:block;"><b><span style="font-size: 12pt; font-family: &quot;Times New Roman&quot;, serif;">17...Nd7 18.Kg8 </span></b><span style="font-size: 12pt; font-family: &quot;Times New Roman&quot;, serif;">Zugzwang for Black <b>18...Nb6 19.Kh7 Nd7 20.Kh6 Ne5 21.g5+! Kxf5 22.b6 Nf7+ 23.Kg7 Nxg5 24.b7 </b>+-<b> </b></span></span> <span class="MsoNormal" style="text-align:justify;display:block;"><span style="font-size: 12pt; font-family: &quot;Times New Roman&quot;, serif;"> </span></span></div>