<div class="user_solution"><p class="MsoNormal"><u><span lang="FR">Thematic try :</span></u><span lang="FR"><span>  </span>1. Ra1 ?<span>  </span>Threat : 2. Qa8(Ra8)+<span>  </span>Kc7<span>  </span>3. Nb5 # with block</span></p> <p class="MsoNormal"><span lang="FR"><span> </span>1....Bxc5<span>  </span>2. Qa8+<span>  </span>Kc7<span>  </span>3. Nb5+<span>  </span>Kd7 ! (3....Kb6 ?<span>  </span>4. Qa6 #)<span>  </span>4. ?</span></p> <p class="MsoNormal"><br /></p> <p class="MsoNormal"><b><span lang="FR">   1. Nd7+ !!</span></b></p> <p class="MsoNormal"><br /></p> <p class="MsoNormal"><b><span lang="FR">a)<span>  </span>1....Rxd7</span></b></p> <p class="MsoNormal"><b><span lang="FR"><span>     </span>2. Rc8+ !<span>  </span>Kxc8</span></b></p> <p class="MsoNormal"><b><span lang="FR"><span>     </span>3. Qa8+<span>    </span>Kc7</span></b></p> <p class="MsoNormal"><b><span lang="FR"><span>     </span>4. Nb5 !<span>  </span>#</span></b><span lang="FR"><span>  </span>Selfblock.and block. Model mate.</span></p> <p class="MsoNormal"><br /></p> <p class="MsoNormal"><b><span lang="FR">b)<span>  </span>1....Ka7</span></b></p> <p class="MsoNormal"><b><span lang="FR"><span> </span>2. Ra1+<span>  </span>Ba5</span></b></p> <p class="MsoNormal"><b><span lang="FR"><span> </span>3. Rxa5+<span>  </span>Qa6+</span></b></p> <p class="MsoNormal"><b><span lang="FR"><span> </span>4. Nb5 !<span>  </span>#<span>  </span></span></b><span lang="FR">selfpin and selfblock with cross-checks. Model mate.</span></p> <p class="MsoNormal"><b><span lang="FR"><span> </span></span></b></p></div><br />