<div class='user_solution'><style> &lt;!-- /* Font Definitions */ @font-face {font-family:&quot;Cambria Math&quot;; panose-1:2 4 5 3 5 4 6 3 2 4; mso-font-charset:0; mso-generic-font-family:auto; mso-font-pitch:variable; mso-font-signature:-536870145 1107305727 0 0 415 0;} /* Style Definitions */ p.MsoNormal, li.MsoNormal, div.MsoNormal {mso-style-unhide:no; mso-style-qformat:yes; mso-style-parent:&quot;&quot;; margin:0cm; margin-bottom:.0001pt; mso-pagination:widow-orphan; font-size:12.0pt; font-family:&quot;Times New Roman&quot;; mso-fareast-font-family:&quot;Times New Roman&quot;;} .MsoChpDefault {mso-style-type:export-only; mso-default-props:yes; font-size:10.0pt; mso-ansi-font-size:10.0pt; mso-bidi-font-size:10.0pt;} @page WordSection1 {size:612.0pt 792.0pt; margin:70.85pt 70.85pt 70.85pt 70.85pt; mso-header-margin:36.0pt; mso-footer-margin:36.0pt; mso-paper-source:0;} div.WordSection1 {page:WordSection1;} --&gt; </style> <p class="MsoNormal"><b>1.Ne6+!</b></p> <p class="MsoNormal">1.Qf4? e1=N+! 2.Kg3 (2.Ke2? c1=Q -+ ; 2.Ke4? Rb4+ -+-) </p> <p class="MsoNormal">2…Be5! 3.Qxe5 and, eg, 3…c1=Q =</p> <p class="MsoNormal"><b>1…Bxe6</b></p> <p class="MsoNormal"><b>2.Qxe6 </b></p> <p class="MsoNormal">2.Qxc3? Rb3 -+</p> <p class="MsoNormal"><b>2…e1=N+!</b></p> <p class="MsoNormal"><b>3.Kg3!</b></p> <p class="MsoNormal">3.Ke4? (3.Kf2/4? c1=Q+ -+) 3…Rb4+ 4.Kd5 (4.Kf5? Rf4+! 5.Kg6 Rf6+ -+) 4…</p> <p class="MsoNormal">Rd4+ 5.Kc6 Rxd6+ 6.Qxd6+ and White cannot make any progress, eg 6…Kf7 7.</p> <p class="MsoNormal">Qf4+ Kg7 8.Qg5+ Kf8 9.Qc5+ Kf7 10.Qxc3 Nd3 =.</p> <p class="MsoNormal"><b>A) 3…Be5+</b></p> <p class="MsoNormal"><b>4.Kh3!</b></p> <p class="MsoNormal">4.Qxe5? Rb3+ -+</p> <p class="MsoNormal"><b>4…Rb3+!</b></p> <p class="MsoNormal"><b>5.Qxb3 Bxd6</b></p> <p class="MsoNormal"><b>6.Qc4</b></p> <p class="MsoNormal">(6.Qc3 Kf7 7.Qc4+ [7.Qxe1? Bf4=] 7…Ke7 etc. as below, extending solution by one move) </p><p class="MsoNormal">6.Qb2? Be5! (not 7…Bf4? 8.Qf6+ and 9.Qxf4+-) 7.Qb4+ Kf7 8.Qxe1 Bf4 =</p> <p class="MsoNormal">6.Qe3? Nd3 =</p> <p class="MsoNormal"><b>6…Ke7</b></p> <p class="MsoNormal">6 …Ba3 7.Qf4+ Ke7 8.Qe3+ and 9.Qxa3 +-</p> <p class="MsoNormal">6 …Be5 7.Qf1+ and 8.Qxe1 +-</p> <p class="MsoNormal"><b>7.Qe2+!</b></p> <p class="MsoNormal">7.Qc3(?) Kf7 8.Qc4+ is a loss of time.</p> <p class="MsoNormal">7.Qc6? Bb4 =</p> <p class="MsoNormal">7.Qc8? Bf4 =</p> <p class="MsoNormal">7.Qe4+? Kd7 8.Qa4+ Ke6 = </p> <p class="MsoNormal"><b>7… Kd7</b></p> <p class="MsoNormal">7…Kf7 8.Qf2+! (8.Qxe1? Bf4!=) 8…Kg8 9.Qxe1 Bf4 and, eg, 10.Qe6+ Kg7 </p> <p class="MsoNormal">11.Qd7+ Kg6 12.Qc6+ +-</p> <p class="MsoNormal"><b>8.Qd2! </b></p> <p class="MsoNormal">8.Qb5+? Ke6  9.Qe2 Kd5 10.Qxe1 Kc4! (10…Bf4? 11.Qa5+ Kc4<span>  </span>12.Qxf4 +-) </p> <p class="MsoNormal">11.Qe6+ Kc3=</p> <p class="MsoNormal">8.Qxe1? Bf4 ! = (and not 8…Bb4?<span>  </span>9.Qc1 +-)</p> <p class="MsoNormal">Now, the pinned Bishop cannot help.</p> <p class="MsoNormal"><b>8…Sd3</b></p> <p class="MsoNormal"><b>9.Qxc2 Sf4+</b></p> <p class="MsoNormal"><b>10.Kh2! +-</b></p> <p class="MsoNormal">10.Kg3(?) Nd3+ 11.Kh3 Nf4+ 12.Kh2 is a loss of time.</p> <p class="MsoNormal">Black cannot exploit the battery : after 10…Nd3+ or 10…Nd5+ 11.Kg(h)1 </p> <p class="MsoNormal">and White wins.<b> </b></p> <p class="MsoNormal"><b> </b></p> <p class="MsoNormal"><b>B)</b> <b>3…Rb7 </b></p> <p class="MsoNormal"><b>4.Qc8+! </b></p> <p class="MsoNormal">4.Qh6+? Rg7+! (4…Bg7? 5.Qf4+ +-) 5.Kh3 Nd3 -+</p> <p class="MsoNormal"><b>4…Ke7</b></p> <p class="MsoNormal"><b>5.Sf5+! </b></p> <p class="MsoNormal">5.Qxb7+? (5.Qxc3? Rb3!) 5…Kxd6 6.Qb6+ Kd5! (6…Ke5? 7.Qe3+ +- ; </p> <p class="MsoNormal">6…Kd7 ? 7.Qb5+ +-) 7.Qb3+ Kd4 =</p> <p class="MsoNormal"><b>5…Kf6 </b></p> <p class="MsoNormal"><b>6.Qxc3+ </b></p> <p class="MsoNormal">6.Qh8+? Kxf5 =</p> <p class="MsoNormal"><b>6…Kxf5 </b></p> <p class="MsoNormal"><b>7.Qxe1 </b></p> <p class="MsoNormal">7.Qa5+? Ke4 8.Qxe1+ Kd3! =</p> <p class="MsoNormal"><b>7…Rb1 </b></p> <p class="MsoNormal">7…Rc7 8.Qa5+ +- </p> <p class="MsoNormal"><b>8.Qf2+ </b> </p> <p class="MsoNormal">8.Qa5+? Ke4= </p> <p class="MsoNormal"><b>8…Kg6</b></p> <p class="MsoNormal"><b>9.Qxc2</b> +- </p></div>