<div class='user_solution'><p class="MsoNormal"><b>Themes: Domination Rook and bishop against Queen- Elimination of the threat of stalemate in the counterplay of black - Positions of &quot;mutual Zugzwang&quot;</b></p> <p class="MsoNormal"><b> </b></p> <span style="text-align:justify;display:block;" class="MsoNormal"><b><u>1.Rg7</u>+! </b></span> <span style="text-align:justify;display:block;" class="MsoNormal"><b>Thematic try</b> : 1.Rxh4+? Kg8 2.Rg4+ Kh7 3.Rg7+ Kxh8 4.Ba1 Qa8! 5.Kg4 <i>(5.f4 e3 </i>(ab) <i>6.f5 </i>(ba) <i>Qa3!=) </i>5...e3! 6.fxe3 Qa3 7.Kh5 Qxb3 8.Kh6 Qb1 9.Rg1+ Qxa1 10.Rxa1 b3 11.Rc1 Kg8 12.Kg6 Kf8!=</span> <span style="text-align:justify;display:block;" class="MsoNormal">or 1.Bxd8? a1Q 2.Rxh4+ Kg8 3.Ng6 Qf1+ 4.Kg3 Qxe2 5.Ne5 e3! 6.fxe3 Qxe3+ 7.Nf3 Qxb3=</span> <span style="text-align:justify;display:block;" class="MsoNormal"> </span> <span style="text-align:justify;display:block;" class="MsoNormal"><b><u>1...Kxh8 2.Ba1 Qa8 </u></b></span> <span style="text-align:justify;display:block;" class="MsoNormal">2...Qd2 3.f4 /Rd7+- or<span>  </span>2...Qf8 3.Rf7+ Kg8 4.Rxf8+-</span> <span style="text-align:justify;display:block;" class="MsoNormal"><b> </b></span> <span style="text-align:justify;display:block;" class="MsoNormal"><b><u>3.f4</u>!! </b></span> <span style="text-align:justify;display:block;" class="MsoNormal"><b>Try I :</b> 3.Kxh4? e3! 4.f4 Qa3 5.Kh5 Qxb3 6.Kh6 Qb1 <b>(1)</b> 7.Rg1+ Qxa1 8.Rxa1 b3 9.f5 Kg8 10.Kg6 Kf8 11.Kf6 Ke8 12.Ke6 Kd8 13.Kd6 Ke8!=</span> <span style="text-align:justify;display:block;" class="MsoNormal">or 3.f3? e3 4.Kxh4 Qa3=</span> <span style="text-align:justify;display:block;" class="MsoNormal"> </span><span style="text-align:justify;display:block;" class="MsoNormal"> <span style="text-align:justify;display:block;" class="MsoNormal"><b>With two lines</b><b><span style="font-size: 14pt;">:</span></b><span style="font-size: 14pt;"> </span></span> </span> <span style="text-align:justify;display:block;" class="MsoNormal"><b><span style="font-size: 14pt;"><br /></span></b><span style="font-size: 14pt;"> </span></span> <span style="text-align:justify;display:block;" class="MsoNormal"><b> </b></span> <span style="text-align:justify;display:block;" class="MsoNormal"><b><span style="font-size: 14pt;">A)</span></b> <b><u>3...exf3 4.exf3 Qc8</u>+ </b></span> <span style="text-align:justify;display:block;" class="MsoNormal">4...Qa3 5.f4 Qxb3+ <i>(5...Qa6 6.Rg6+-) </i>6.Rg3+-</span> <span style="text-align:justify;display:block;" class="MsoNormal"><b> </b></span> <span style="text-align:justify;display:block;" class="MsoNormal"><b><u>5.Kxh4 Qd8+ 6.Kh5 Qe8</u>+ <span> </span>(</b>6...Qd1 7.Rg1+)</span> <span style="text-align:justify;display:block;" class="MsoNormal"> </span> <span style="text-align:justify;display:block;" class="MsoNormal"><b><u>7.Kh6 Qf8</u> <span>  </span>(</b>7...Qc6+ 8.Rg6+- or<span>  </span>7...Qe3+ 8.Rg5+-)</span> <span style="text-align:justify;display:block;" class="MsoNormal"> </span> <span style="text-align:justify;display:block;" class="MsoNormal"><span> </span><b><u>8.f4</u>! </b></span> <span style="text-align:justify;display:block;" class="MsoNormal">8.Bb2? a1Q 9.Bxa1 b5 10.f4 Qf6+ 11.Bxf6= <b>stalemate</b> <br /></span><br /> <span style="text-align:justify;display:block;" class="MsoNormal"><b><u>8...b6 </u><span> </span>(</b>8...b5 9.f5!+-)</span> <span style="text-align:justify;display:block;" class="MsoNormal"><b><u><span style="text-decoration: none;"> </span></u></b></span> <span style="text-align:justify;display:block;" class="MsoNormal"><b><u>9.Bb2</u>! </b></span> <span style="text-align:justify;display:block;" class="MsoNormal">9.Be5? Qd6+! 10.Bxd6 a1Q 11.Be5 Qh1+!=</span> <span style="text-align:justify;display:block;" class="MsoNormal"> </span> <span style="text-align:justify;display:block;" class="MsoNormal"><b><u>9...a1Q 10.Bxa1 b5 11.Be5</u>! </b></span> <span style="text-align:justify;display:block;" class="MsoNormal">11.f5? Qf6+!= </span> <span style="text-align:justify;display:block;" class="MsoNormal"> </span> <span style="text-align:justify;display:block;" class="MsoNormal"><b><u>11...Qf6+ 12.Rg6! Qxe5 13.Rg8</u>+ </b></span> <span style="text-align:justify;display:block;" class="MsoNormal">13.fxe5? <b>stalemate</b></span> <span style="text-align:justify;display:block;" class="MsoNormal"> </span> <span style="text-align:justify;display:block;" class="MsoNormal"><b><u>13...Kxg8 14.fxe5 Kf7 15.Kg5 Ke6 16.Kf4 Kd5</u> (</b>16...Ke7 17.Ke4+-) <b><u>17.Kf5</u>!+- </b></span> <span style="text-align:justify;display:block;" class="MsoNormal"><b> </b></span> <span style="text-align:justify;display:block;" class="MsoNormal"><b> </b></span> <span style="text-align:justify;display:block;" class="MsoNormal"><b><span style="font-size: 14pt;">B)</span> <u>3...e3 4.f5</u>!</b> </span> <span style="text-align:justify;display:block;" class="MsoNormal"><i>4.Kxh4? Qa3 5.Kh5 Qxb3 6.Kh6 Qb1= </i><b>(1)</b> similar a <b>Try I</b></span> <span style="text-align:justify;display:block;" class="MsoNormal"><b> </b></span> <span style="text-align:justify;display:block;" class="MsoNormal"><b><u>4...Qa5</u></b> <i>(4...Qa3 5.f6 Qa6 6.f7+- </i>no check on h6<i>)</i></span> <span style="text-align:justify;display:block;" class="MsoNormal"><i> </i></span> <span style="text-align:justify;display:block;" class="MsoNormal"><b><u>5.Kg4</u>! </b></span> <span style="text-align:justify;display:block;" class="MsoNormal"><b>Try II</b> : 5.Kxh4? Qd8+ 6.Kh5 <i>(6.Kh3 Qd2=) </i>6...Qe8+ 7.Kh6 Qf8 8.Bb2 b6!! Zugzwang 9.Ba1 b5 10.Bb2 a1Q 11.Bxa1 Qf6+ 12.Bxf6 <b>stalemate</b> </span> <span style="text-align:justify;display:block;" class="MsoNormal"> </span> <span style="text-align:justify;display:block;" class="MsoNormal"><b><u>5...h3 6.f6 h2</u></b><u> </u></span> <span style="text-align:justify;display:block;" class="MsoNormal"><i>6...Qh5+ 7.Kxh5 h2 8.Kg6 h1Q 9.Rg8+ Kxg8 10.f7+ Kf8 11.Bg7+ Ke7 12.f8Q+-</i></span> <span style="text-align:justify;display:block;" class="MsoNormal"><i> </i></span> <span style="text-align:justify;display:block;" class="MsoNormal"><b><u>7.f7 Qh5+ 8.Kf4 Qh6+ 9.Kf5 Qh3+ 10.Rg4+ Kh7 11.f8Q Qf1+ 12.Rf4</u>!+- </b></span> <span style="text-align:justify;display:block;" class="MsoNormal"> </span> <p class="MsoNormal"><span style="font-size: 10pt; font-family: &quot;FigurineCB AriesSP&quot;;"> </span></p> <p class="MsoNormal"><b> </b></p></div>