<div class='user_solution'><span class="MsoNormal" style="text-align:justify;display:block;"><b><span>1.Rg5+ Kh8 </span></b></span> <span class="MsoNormal" style="text-align:justify;display:block;"><b><span>main :</span></b><span><span>  </span>1...Kh7 2.Rf5 Rxe6+ 3.Kf8 Rf6+!<span>  </span>playing for stalemate 4.Rxf6 f1Q 5.Ng5+ Kh8 6.Nf7+ Kh7 7.Rh6#</span></span> <span class="MsoNormal" style="text-align:justify;display:block;"><span> </span></span> <span class="MsoNormal" style="text-align:justify;display:block;"><b><span>2.Nh2 Rxe6+ 3.Kf7 Re4 4.Rf5 Kh7 5.Rxf2 </span></b><span>or [5.Nf1 Rh4 6.Rxf2] <b>5...Rh4 6.Nf1 Rh3 7.Rf6! Rxh5 8.Rf2! Rh3 9.Ng3! </b></span></span> <span class="MsoNormal" style="text-align:justify;display:block;"><span>9.Ne3? Kh6 10.Kf6 Kh5 =</span></span> <span class="MsoNormal" style="text-align:justify;display:block;"><span> </span></span> <span class="MsoNormal" style="text-align:justify;display:block;"><b><span>9...Kh6 10.Kf6 Rxg3 11.Rh2+ Rh3 12.Rxh3# </span></b><span></span></span> <span class="MsoNormal" style="text-align:justify;display:block;"><span> </span></span></div>