<div class='user_solution'><span style="text-align:justify;display:block;" class="MsoNormal"><b>1.f6! </b></span> <span style="text-align:justify;display:block;" class="MsoNormal">1.Kf8? Be4! 2.f6 Bd5</span> <span style="text-align:justify;display:block;" class="MsoNormal"> </span> <span style="text-align:justify;display:block;" class="MsoNormal"><b>1...Bc6+ 2.Ke7 </b></span> <span style="text-align:justify;display:block;" class="MsoNormal">2.Kf8? Bd5!</span> <span style="text-align:justify;display:block;" class="MsoNormal"> </span> <span style="text-align:justify;display:block;" class="MsoNormal"><b>2...Bd5 3.Kf8 Bb3 4.Nf3 Bf7 5.Ne5 Ba2 6.f7! </b></span> <span style="text-align:justify;display:block;" class="MsoNormal">6.Ng6+? hxg6 7.hxg6 Bb1 8.g7+ Kh7 9.g8Q+ Kxh6 10.Ke7 matte in 15 moves</span> <span style="text-align:justify;display:block;" class="MsoNormal"> </span> <span style="text-align:justify;display:block;" class="MsoNormal"><b>6...Bb3 7.Ng6+ hxg6 8.hxg6 Ba2 9.Ke7 Bxf7 10.gxf7 Kh7 11.Kf6 Kxh6 12.f8Q+ Kh5 13.Qb4 Kh6 14.Qh4# </b></span> <span style="text-align:justify;display:block;" class="MsoNormal"><b> </b></span></div>