<div class="user_solution"><p class="MsoNormal"><b><span>1.Bc2! </span></b><span>[1.e7? Rh8 2.Bc2 Nc5+ 3.Rxc5 Rxb7=; 1.Be4? Rh8=] </span></p> <p class="MsoNormal"><b><span>1...Nc5+! </span></b><span>[1...Rxb7 2.Re4+ Kc3 3.Bxa4+-] </span></p> <p class="MsoNormal"><b><span>2.Rxc5 Rxb7 </span></b><span>[2...Kxc5 3.Bxb3+-] </span></p> <p class="MsoNormal"><b><span>3.Nd6! <br /></span></b></p> <p class="MsoNormal"><span>[<b>thematic try:</b> 3.Nxa5? Kxc5 4.Nxb7+ Kd5 5.Bb3+ Kc6 6.Ba4+ Kc7 7.e7 Rh6+! 8.Ka7 Re6 9.e8N+!? Kc8 10.Ned6+ Kc7 11.Nb5+ Kc8 12.Bc2 Rf6/Re5 13.Bf5+?! Rxf5= position X;</span></p> <p class="MsoNormal"><span>3.Kxb7? Kxc5=] <br /></span></p> <p class="MsoNormal"><b><span>3...Kxc5 4.Nxb7+ Kd5 </span></b></p> <p class="MsoNormal"><span>[4...Kb4 5.Nd6 a4 6.e7 Rh8 7.Bg6 a3 8.Bf7 Kc3 9.Kb5 </span></p> <p class="MsoNormal"><i><span>(9.Kb7? Kc2!=) </span></i><span>9...Rb8+ 10.Kc6! Rh8 <i>(10...Kc2 11.Nb7 Rh8 12.Nc5+-) </i></span></p> <p class="MsoNormal"><span>11.Kc5! Rb8 12.Nb7! Rh8 13.Na5 Kb2 14.Nc4++-] </span></p> <p class="MsoNormal"><b><span>5.Bb3+ Kc6 </span></b></p> <p class="MsoNormal"><b><span>6.Ba4+ Kc7 </span></b></p> <p class="MsoNormal"><b><span>7.e7 Rh6+! </span></b></p> <p class="MsoNormal"><b><span>8.Ka7 Re6! </span></b></p> <p class="MsoNormal"><b><span>9.e8N+! </span></b><span>[9.e8Q? Ra6+! 10.Kxa6 stalemate] </span></p> <p class="MsoNormal"><b><span>9...Kc8 </span></b></p> <p class="MsoNormal"><b><span>10.Ned6+ Kc7 </span></b></p> <p class="MsoNormal"><b><span>11.Nb5+ Kc8 </span></b></p> <p class="MsoNormal"><b><span>12.Bc2! </span></b><span>switchback [loss of time 12.Bd1?! Rg6 13.Bc2 Rf6] </span></p> <p class="MsoNormal"><b><span>12...Rf6 13.Bf5+! Rxf5</span></b><span> position X with bPa5</span></p> <p class="MsoNormal"><b><span>14.N7d6+ Kd7 </span></b></p> <p class="MsoNormal"><b><span>15.Nxf5 a4</span></b></p><p class="MsoNormal"><b><span>16.Na3+- </span></b><span>win after Troitzky<br /></span></p> <span style="font-size: 12pt; font-family: &quot;Times New Roman&quot;;" lang="FR"><br style="break-before: page;" clear="all" /> </span></div>