<div class="user_solution"><p class="MsoNormal"><span lang="EN-US">Allumwandlung as twin study</span></p> <p class="MsoNormal"><b><span lang="EN-US"> </span></b></p> <p class="MsoNormal"><b><u><span lang="EN-US">Twin A)</span></u></b><b><span lang="EN-US"> diagram</span></b></p> <p class="MsoNormal"><b><span lang="EN-US">1.Kc8 </span></b></p> <p class="MsoNormal"><span lang="EN-US">[1.Kc6? Rd8! 2.Kc7 Ra8! 3.b5 Kg7=] </span></p> <p class="MsoNormal"><b><span lang="EN-US">1...Ra7 2.Kb8! </span></b></p> <p class="MsoNormal"><span lang="EN-US">[2.f8N+? Kh6! 3.Be8 Ra8+ 4.Kd7 Rb8=] </span></p> <p class="MsoNormal"><b><span lang="EN-US"> </span></b></p> <p class="MsoNormal"><b><span lang="EN-US">2...Re7 <span style="color: blue;">3.f8R!</span>+- </span></b></p> <p class="MsoNormal"><span lang="EN-US">[3.f8Q? Rb7+! 4.Kc8 Rb8+! 5.Kxb8 model stalemate; </span></p> <p class="MsoNormal"><span lang="EN-US">3.f8B? Re5! 4.Bg4 Re8+ 5.Kc7 Rxf8=] <b><span> </span></b></span></p> <p class="MsoNormal"><span lang="EN-US"> </span></p> <p class="MsoNormal"><b><span lang="EN-US">2...Ra6</span></b><span lang="EN-US">/Ra4<b> <span style="color: blue;">3.f8B!</span></b>+- </span></p> <p class="MsoNormal"><span lang="EN-US">[3.f8Q? Ra8+! 4.Kxa8 model stalemate; </span></p> <p class="MsoNormal"><span lang="EN-US">3.f8R? Rb6+ 4.Kc7 Rxb4=; </span></p> <p class="MsoNormal"><span lang="EN-US">3.f8N+? Kh6! 4.b5 Rb6+ 5.Kc7 Rxb5=;</span></p> <p class="MsoNormal"><span lang="EN-US">3.Kb7? Rf6!= ] </span></p> <p class="MsoNormal"><span lang="EN-US"> </span></p> <p class="MsoNormal"><b><u>Twin B)</u> wPb4 to d4</b></p> <p class="MsoNormal"><b><span lang="EN-US">1.Kc8 </span></b></p> <p class="MsoNormal"><span lang="EN-US">[1.Kc6? Rd8! 2.Kc7 Ra8!=]</span></p> <p class="MsoNormal"><b><span lang="EN-US"> </span></b></p> <p class="MsoNormal"><b><span lang="EN-US">1...Ra7 2.<span style="color: blue;">f8N+!</span> </span></b></p> <p class="MsoNormal"><span lang="EN-US">[2.Kb8? Ra4! 3.Bd1 <i>(3.f8Q Ra8+! 4.Kxa8 </i>model stalemate<i>; 3.f8B Rxd4=)</i></span></p> <p class="MsoNormal"><i><span lang="EN-US"><span> </span></span></i><span lang="EN-US">3...Rb4+! 4.Ka7 Kg7=] </span></p> <p class="MsoNormal"><b><span lang="EN-US">2...Kh6 3.Be8! </span></b></p> <p class="MsoNormal"><span lang="EN-US">[3.Bf3? Rf7=; </span></p> <p class="MsoNormal"><span lang="EN-US">3.Bg4? Ra8+ 4.Kc7 Rxf8=] </span></p> <p class="MsoNormal"><b><span lang="EN-US">3...Ra8+ 4.Kd7+-</span></b></p> <p class="MsoNormal"><span lang="EN-US"> </span></p> <p class="MsoNormal"><b><span lang="EN-US">1...Rxd4</span></b><span lang="EN-US">/Rd6<b> <span style="color: blue;">2.f8Q!</span> Rd8+ 3.Qxd8</b>+- </span></p> <p class="MsoNormal"><span lang="EN-US">[3.Kxd8? model stalemate] </span></p></div><br />