<div class='user_solution'><u><span style="font-size: 12pt; font-family: Arial;">1.Qb1?</span></u><span style="font-size: 12pt; font-family: Arial;"><span>  </span>threat <u>2.Qg6+ Kf8 3.Qf7#</u><span>   </span>1…Sf6</span><span style="font-size: 12pt; font-family: Arial;">~</span><span style="font-size: 12pt; font-family: Arial;">!<span>     </span>1…Kf8 2.Qf5 zz.</span><br /> <u><span style="font-size: 12pt; font-family: Arial;">1.Q:c4?</span></u><span style="font-size: 12pt; font-family: Arial;"> threat <u>2.Qf7+ Kh6 3.Qg6#</u><span>  </span>1…Se4(Sg4)!<span>   </span>1…Kh6 2.Qe6 zz.</span><br /> <span style="font-size: 12pt; font-family: Arial;"> </span><br /> <u><span style="font-size: 12pt; font-family: Arial;">1.Qf2?</span></u><span style="font-size: 12pt; font-family: Arial;"> zz.<span> </span>1…Kh6! 2.K:c4? Kh5(Bg7)! </span><br /> <b><span style="font-size: 12pt; font-family: Arial;">1…Kf8</span></b><span style="font-size: 12pt; font-family: Arial;"><span>  </span></span><b><span style="font-size: 12pt; font-family: Arial;">2.Qf5</span></b><span style="font-size: 12pt; font-family: Arial;"> </span><b><span style="font-size: 12pt; font-family: Arial;">(A)</span></b><span style="font-size: 12pt; font-family: Arial;"> zz. K:e7<span>  </span></span><b><span style="font-size: 12pt; font-family: Arial;">3.Qe6+</span></b><span style="font-size: 12pt; font-family: Arial;"> </span><b><span style="font-size: 12pt; font-family: Arial;">(D)</span></b><span style="font-size: 12pt; font-family: Arial;"> Kd8, Kf8<span>  </span>4.Ba5, <u>Qf7#</u></span><br /> <span style="font-size: 12pt; font-family: Arial;"><span>       </span>2…Ke8<span>  </span><u>3.Qc8+</u> K:e7<span>  </span>4.Bb4#</span><br /> <span style="font-size: 12pt; font-family: Arial;"><span> </span><u>2…Kg7<span>  </span>3.Qg6+ Kf8<span>  </span>4.Qf7#</u></span><br /> <span style="font-size: 12pt; font-family: Arial;"><span> </span><u>2…Bg7</u><span>  </span>3.Sg6+ Ke8, Kg8<span>  </span><u>4.Qc8</u>, </span><b><span style="font-size: 12pt; font-family: Arial;">Qe6# (D)</span></b><span style="font-size: 12pt; font-family: Arial;"> </span><br /> <span style="font-size: 12pt; font-family: Arial;"> </span><br /> <span style="font-size: 12pt; font-family: Arial;">/ 1…Sf6</span><span style="font-size: 12pt; font-family: Arial;">~</span><span style="font-size: 12pt; font-family: Arial;"> 2.Kd4</span><span style="font-size: 12pt; font-family: Arial;">~</span><span style="font-size: 12pt; font-family: Arial;">+ Sf6<span>  </span>3.Q:f6#<span>  </span>2…Kh6<span>  </span>3.Sf7+ /</span><br /> <span style="font-size: 12pt; font-family: Arial;"> </span><br /> <b><u><span style="font-size: 12pt; font-family: Arial;">1.K:c4?</span></u></b><b><span style="font-size: 12pt; font-family: Arial;"> (C)</span></b><span style="font-size: 12pt; font-family: Arial;"> zz.<span>     </span>1…Kh6! 2.Qg2? Kg7! (C.B)</span><br /> <b><span style="font-size: 12pt; font-family: Arial;">1…Kf8</span></b><span style="font-size: 12pt; font-family: Arial;"><span>  </span></span><b><span style="font-size: 12pt; font-family: Arial;">2.Qa6 (B)</span></b><span style="font-size: 12pt; font-family: Arial;"> zz. K:e7<span>  </span>3.Qe6+ (D) Kd8, Kf8<span>  </span>4.Ba5, <u>Qf7#</u></span><br /> <span style="font-size: 12pt; font-family: Arial;"><span>       </span>2…Ke8<span>  </span><u>3.Qc8+</u> K:e7<span>  </span>4.Bb4#</span><br /> <span style="font-size: 12pt; font-family: Arial;"><span>       </span>2…Kg7<span>  </span>3.Q:f6#</span><br /> <span style="font-size: 12pt; font-family: Arial;"><span> </span><u>2…Bg7</u><span>  </span>3.Sg6+ Ke8, Kg8<span>  </span><u>4.Qc8,</u> Qe6# (D)<span>    </span>/ 2…Sf6</span><span style="font-size: 12pt; font-family: Arial;">~</span><span style="font-size: 12pt; font-family: Arial;"> 3.Sg6+ /</span><br /> <span style="font-size: 12pt; font-family: Arial;"> </span><br /> <b><u><span style="font-size: 12pt; font-family: Arial;">1.Qa6!</span></u></b><b><span style="font-size: 12pt; font-family: Arial;"> (B) </span></b><span style="font-size: 12pt; font-family: Arial;">zugzwang</span><br /> <b><span style="font-size: 12pt; font-family: Arial;">1…Kf8</span></b><span style="font-size: 12pt; font-family: Arial;"> </span><b><span style="font-size: 12pt; font-family: Arial;">2.K:c4 (C)</span></b><span style="font-size: 12pt; font-family: Arial;"> zz. K:e7 3.Qe6+ (D) Kd8, Kf8<span>  </span>4.Ba5, <u>Qf7#</u></span><br /> <span style="font-size: 12pt; font-family: Arial;"><span>       </span>2…Ke8<span>  </span><u>3.Qc8+</u> K:e7<span>  </span>4.Bb4#</span><br /> <span style="font-size: 12pt; font-family: Arial;"><span>   </span><span>     </span>2…Kg7<span>  </span>3.Q:f6#</span><br /> <span style="font-size: 12pt; font-family: Arial;"><span> </span><u>2…Bg7</u><span>  </span>3.Sg6+ Ke8, Kg8<span>  </span><u>4.Qc8</u>, Qe6# (D)<span>     </span>/ 2…Sf6</span><span style="font-size: 12pt; font-family: Arial;">~</span><span style="font-size: 12pt; font-family: Arial;"> 3.Sg6+ /</span><br /> <span style="font-size: 12pt; font-family: Arial;"> </span><br /> <span style="font-size: 12pt; font-family: Arial;">1…Kh6<span>  </span></span><b><span style="font-size: 12pt; font-family: Arial;">2.Qe6</span></b><span style="font-size: 12pt; font-family: Arial;"> </span><b><span style="font-size: 12pt; font-family: Arial;">(D)</span></b><span style="font-size: 12pt; font-family: Arial;"> zz. K:g5<span>  </span></span><b><span style="font-size: 12pt; font-family: Arial;">3.Qf5+</span></b><span style="font-size: 12pt; font-family: Arial;"> </span><b><span style="font-size: 12pt; font-family: Arial;">(A)</span></b><span style="font-size: 12pt; font-family: Arial;"> Kh4, Kh6<span>  </span>4.Be1, <u>Qg6#</u></span><br /> <span style="font-size: 12pt; font-family: Arial;"><span> </span><u>2…Kg7<span>  </span>3.Qf7+ Kh6<span>  </span>4.Qg6#</u></span><br /> <span style="font-size: 12pt; font-family: Arial;"><span>    </span><span>     </span>2…Kh5<span>  </span><u>3.Qh3+</u> K:g5<span>  </span>4.Bd2#</span><br /> <span style="font-size: 12pt; font-family: Arial;"><span> </span></span><span style="font-size: 12pt; font-family: Arial;"><span> </span></span><u><span style="font-size: 12pt; font-family: Arial;">2…Bg7</span></u><span style="font-size: 12pt; font-family: Arial;"><span>  </span>3.Sf7+ Kh5, Kh7<span>  </span><u>4.Qh3</u>, </span><b><span style="font-size: 12pt; font-family: Arial;">Qf5# (A)</span></b><span style="font-size: 12pt; font-family: Arial;"> </span><br /> <span style="font-size: 12pt; font-family: Arial;"> </span><br /> <span style="font-size: 12pt; font-family: Arial;">/ 1…Sf6</span><span style="font-size: 12pt; font-family: Arial;">~</span><span style="font-size: 12pt; font-family: Arial;"> 2.Kd4</span><span style="font-size: 12pt; font-family: Arial;">~</span><span style="font-size: 12pt; font-family: Arial;">+ Sf6<span>  </span>3.Q:f6#<span>  </span>2…Kf8<span>  </span>3.Sg6+ /</span><br /> <span style="font-size: 12pt; font-family: Arial;"> </span><br /></div>