<div class='user_solution'><span class="MsoNormal" style="text-align:justify;display:block;"><b><u>1.Rd4</u>+! </b></span> <span class="MsoNormal" style="text-align:justify;display:block;"><b>Try :</b> 1.Nd3+? Ke3 2.Ng4+ <i>(2.Nf5+ Ke4!=) </i>2...Ke2 3.Nc1+ Kf3 4.Nh2+ <i>(4.Ne5+ Ke4! 5.Ne2 Kxe5 6.Ra6 Bd1 7.Ra5+ Ke4=) </i>4...Kg3 5.Ne2+ Kf2 <i>(5...Kxh2? 6.Rh6#) </i>6.Rd2 <i>(6.Re6 Bd7 7.Ng4+ Ke1 8.Re5 Bxg4 9.Nf4+ Kf1=) </i>6...Bb5 7.Nd4+ Kg3 8.Nhf3 g4 9.Ng1 Bf1 10.Ka7 Kh2 11.Nde2 Bxe2 12.Nxe2 g1Q+ 13.Nxg1+ Kxg1=</span> <span class="MsoNormal" style="text-align:justify;display:block;"> </span> <span class="MsoNormal" style="text-align:justify;display:block;"><b><u>1...Kf3 </u></b></span> <span class="MsoNormal" style="text-align:justify;display:block;">1...Kg3 2.Rd3+ Kf4 <i>(2...Kh4 3.Nf5+- or ; 2...Kf2 3.Ng4+-or 2...Kh2 3.Ng4+ Kh1 4.Rh3+-) </i>3.Nd5+ Ke4 4.Rg3!+-</span> <span class="MsoNormal" style="text-align:justify;display:block;"> </span> <span class="MsoNormal" style="text-align:justify;display:block;"><b><u>2.Rg4</u>! (</b>2.Rd3+? Ke2!=)</span> <span class="MsoNormal" style="text-align:justify;display:block;"> </span> <span class="MsoNormal" style="text-align:justify;display:block;"><b>With the following lines</b> : </span> <span class="MsoNormal" style="text-align:justify;display:block;"> </span> <span class="MsoNormal" style="text-align:justify;display:block;"><b><span style="font-size: 14pt;"> </span></b></span> <span class="MsoNormal" style="text-align:justify;display:block;"><b><span style="font-size: 14pt;">A)</span></b> <b><u>2...Bc6+ 3.Kb8!</u></b> </span> <span class="MsoNormal" style="text-align:justify;display:block;"><b>Try<span>  </span></b>: <i>3.Nxc6? Kf2 4.Ne5 g1Q 5.Rxg1 Kxg1 6.Nhg4 Kg2= (</i>no<span>  </span>Troiski)<i> </i></span> <span class="MsoNormal" style="text-align:justify;display:block;"><i> </i></span> <span class="MsoNormal" style="text-align:justify;display:block;"><b><u>3...Kf2</u></b><u> </u><span> </span></span> <span class="MsoNormal" style="text-align:justify;display:block;"><i>3...Be4 4.Rxg5 Kf2 5.Ng4+ Kf1 6.Ne3+)</i></span> <span class="MsoNormal" style="text-align:justify;display:block;"><i> </i></span> <span class="MsoNormal" style="text-align:justify;display:block;"><b><u>4.Nd3+ Kf1<span>  </span></u></b></span> <span class="MsoNormal" style="text-align:justify;display:block;"><i>4...Ke2 5.Rg3 Kf1 6.Nf5</i>/g4 <i>g1Q 7.Ne3+-</i></span> <span class="MsoNormal" style="text-align:justify;display:block;"><b><u><span style="text-decoration: none;"> </span></u></b></span> <span class="MsoNormal" style="text-align:justify;display:block;"><b><u>5.Nf5 g1Q 6.Ng3+ Kg2 7.Ne2</u>+-</b></span> <span class="MsoNormal" style="text-align:justify;display:block;"><b><span style="font-size: 14pt;"> </span></b></span> <span class="MsoNormal" style="text-align:justify;display:block;"><b><span style="font-size: 14pt;"> </span></b></span> <span class="MsoNormal" style="text-align:justify;display:block;"><b><span style="font-size: 14pt;">  <br /></span></b></span> <span class="MsoNormal" style="text-align:justify;display:block;"><b><span style="font-size: 14pt;">B)</span> <u>2...Bc2 3.Nxc2</u>! </b></span> <span class="MsoNormal" style="text-align:justify;display:block;"><b>Try :</b> 3.Rxg5? Kf2 4.Ng4+ Ke2! 5.Ne3 Kxe3 6.Nxc2+ <i>(6.Rxg2 Be4+!=) </i>6...Kf2 7.Rf5+ Kg3 8.Nd4 g1Q 9.Ne2+ Kg4 10.Rf4+ Kg5!=</span> <span class="MsoNormal" style="text-align:justify;display:block;">or 3.Kb8? Kf2 4.Nxc2 g1Q 5.Rxg1 Kxg1 6.Ng4 Kf1= ( no Troiski)</span> <span class="MsoNormal" style="text-align:justify;display:block;"> </span> <span class="MsoNormal" style="text-align:justify;display:block;"><b><u>3...Kf2 4.Ne3! </u><span>  </span></b></span> <span class="MsoNormal" style="text-align:justify;display:block;">4.Kb7? g1Q 5.Rxg1 Kxg1 6.Ng4 Kg2= (no Troiski)</span> <span class="MsoNormal" style="text-align:justify;display:block;"> </span> <span class="MsoNormal" style="text-align:justify;display:block;"><b><u>4...g1Q 5.Rxg1 Kxg1 6.Nhg4!</u>+- </b>Win with mate <b><u>6...Kh1 7.Kb7 Kg1 8.Kc6 Kh1 9.Kd5 Kg1 10.Ke4 Kh1 11.Kf3 Kg1 12.Kg3 Kh1 13.Nf2+ Kg1 14.Nh3+ Kh1 15.Nd1 g4 16.Ndf2</u># </b></span> <span class="MsoNormal" style="text-align:justify;display:block;"><b> </b></span> <span class="MsoNormal" style="text-align:justify;display:block;"><b><span style="font-size: 14pt;"> </span></b></span> <span class="MsoNormal" style="text-align:justify;display:block;"><b><span style="font-size: 14pt;">C)</span> </b><span> </span><b><u>2...Bd1 3.Rxg5!</u></b></span> <span class="MsoNormal" style="text-align:justify;display:block;"><i>3.Nd3? Ke3! 4.Rg3+ Bf3+!=</i></span> <span class="MsoNormal" style="text-align:justify;display:block;"><b><u><span style="text-decoration: none;"> </span></u></b></span> <span class="MsoNormal" style="text-align:justify;display:block;"><b><u>3… Be2 4.Nd5 Kf2 5.Nf4 g1Q 6.Nh3</u>+-</b></span> <span class="MsoNormal" style="text-align:justify;display:block;"><span style="font-size: 10pt; font-family: &quot;FigurineCB AriesSP&quot;;"> </span></span> <span class="MsoNormal" style="text-align:justify;display:block;"><span style="font-size: 10pt; font-family: &quot;FigurineCB AriesSP&quot;;"> </span></span> <span class="MsoNormal" style="text-align:justify;display:block;"><span style="font-size: 10pt; font-family: &quot;FigurineCB AriesSP&quot;;"> </span></span> <span class="MsoNormal" style="text-align:justify;display:block;"><span style="font-size: 10pt; font-family: &quot;FigurineCB AriesSP&quot;;"> </span></span> <span class="MsoNormal" style="text-align:justify;display:block;"><span style="font-size: 10pt; font-family: &quot;FigurineCB AriesSP&quot;;"> </span></span> <span class="MsoNormal" style="text-align:justify;display:block;"><span style="font-size: 10pt; font-family: &quot;FigurineCB AriesSP&quot;;"> </span></span> <span class="MsoNormal" style="text-align:justify;display:block;"><span style="font-size: 10pt; font-family: &quot;FigurineCB AriesSP&quot;;"> </span></span> <span class="MsoNormal" style="text-align:justify;display:block;"><span style="font-size: 10pt; font-family: &quot;FigurineCB AriesSP&quot;;"> </span></span> <span class="MsoNormal" style="text-align:justify;display:block;"><span style="font-size: 10pt; font-family: &quot;FigurineCB AriesSP&quot;;"> </span></span> <span class="MsoNormal" style="text-align:justify;display:block;"><span style="font-size: 10pt; font-family: &quot;FigurineCB AriesSP&quot;;"> </span></span></div>