<div class='user_solution'><span class="MsoNormal" style="text-align:justify;display:block;"><b>1.axb7! </b></span> <span class="MsoNormal" style="text-align:justify;display:block;">1.dxe7? bxa6–+</span> <span class="MsoNormal" style="text-align:justify;display:block;"> </span> <span class="MsoNormal" style="text-align:justify;display:block;"><b>1...Nc6+ 2.Kb5! </b></span> <span class="MsoNormal" style="text-align:justify;display:block;">2.Ka6? cxd6 3.Kb6 <i>(3.Nd4 Nb8+ 4.Ka7 Nd7 5.Nxe6 g5 6.Nc7+ Kf7 7.Nd5 g4=) </i>3...Nb8 4.Kc7 Nd7 5.Kxd6 Nb8 6.Nd4 g5! 7.Kc7 Nd7=</span> <span class="MsoNormal" style="text-align:justify;display:block;"> </span> <span class="MsoNormal" style="text-align:justify;display:block;"><b>2...Kd7 3.Nb4 Nb8 4.Na6 cxd6 5.Kb6! </b></span> <span class="MsoNormal" style="text-align:justify;display:block;">5.Nxb8+? Kc7=</span> <span class="MsoNormal" style="text-align:justify;display:block;"> </span> <span class="MsoNormal" style="text-align:justify;display:block;"><b>5...Nc6 6.Nb4 Nb8 7.Ka7 Kc7 8.Nc2! d5 </b></span> <span class="MsoNormal" style="text-align:justify;display:block;">8...Nc6+ 9.Ka8 f5 10.Nd4+-Echo</span> <span class="MsoNormal" style="text-align:justify;display:block;">8...f5 9.Nd4 f4 10.Nxe6+ Kd7 11.Nxf4!+-</span> <span class="MsoNormal" style="text-align:justify;display:block;">8...Nd7 9.Nd4 Kd8 10.Nxe6+ Ke7 11.Nf4 <i>(</i>or <i>11.Nc7+- ) </i>11...g5 12.Nd5+ Kf7 13.Nb6 Ne5 14.Kb8 g4 15.Kc8 g3 16.b8Q+-</span> <span class="MsoNormal" style="text-align:justify;display:block;"><span> </span></span> <span class="MsoNormal" style="text-align:justify;display:block;"><span> </span><b>9.Nd4 Nd7 10.Nxe6+ Kd6 11.Nf8!+- </b><span style="font-size: 10pt; font-family: &quot;FigurineCB AriesSP&quot;;"></span></span> <p class="MsoNormal"><span style="font-size: 10pt; font-family: &quot;FigurineCB AriesSP&quot;;"> </span></p></div>