<font size="4"><font face="Times New Roman"><font color="#3e6617"><span>a) </span><u><span>Characteristic try</span></u><span> : </span><br /> <span>1; Qf5+ ? Kb4 !! 2. Qf8+ Kb3 3. Qb8+ Kc2 ! -+</span><br /> <u><span>Solution</span></u><span style="TEXT-DECORATION: none"><span> :</span></span><br /> <span style="TEXT-DECORATION: none"></span><span style="TEXT-DECORATION: none">1. Qe5+ ! Ka4 !</span><br /> <span style="TEXT-DECORATION: none">2. Qe8+ Ka3</span><br /> <span style="TEXT-DECORATION: none">3. Qa8+ !</span><br /> <span style="TEXT-DECORATION: none"></span><span style="TEXT-DECORATION: none"><span>3. Qe7+ ? Kb2 ! 4. Qe2+ Kb3 ! -+</span></span><br /> <span style="TEXT-DECORATION: none">3.... Kb3</span><br /> <span style="TEXT-DECORATION: none">4. Qb7+</span><br /> <span style="TEXT-DECORATION: none"></span><span style="TEXT-DECORATION: none"><span>4. Qb8+ ? Kc2 ! -+</span></span><br /> <span style="TEXT-DECORATION: none"></span><span style="TEXT-DECORATION: none">4.... Kc3</span><br /> <span style="TEXT-DECORATION: none">5. Qf3+ </span><br /> <span style="TEXT-DECORATION: none"></span><span style="TEXT-DECORATION: none"><span>5. Qg7+ ? Kc2 ! -+</span></span><br /> <span style="TEXT-DECORATION: none"></span><span style="TEXT-DECORATION: none">5.... Kb4</span><br /> <span style="TEXT-DECORATION: none">6. Qb7+</span><br /> <span style="TEXT-DECORATION: none"></span><span style="TEXT-DECORATION: none"><span>6. Qf8+ ? Kb3 ! 7. Qf3+ c3 ! -+</span></span><br /> <span style="TEXT-DECORATION: none"></span><span style="TEXT-DECORATION: none">6.... Kc3</span><br /> <span style="TEXT-DECORATION: none"></span><span style="TEXT-DECORATION: none">7. Qf3+</span><span style="TEXT-DECORATION: none"><span> positional draw.</span></span><br /> <br /> <br /> <span style="TEXT-DECORATION: none"><span>b)</span></span><u><span> Characteristic try</span></u><span style="TEXT-DECORATION: none"><span> :</span></span><br /> <span style="TEXT-DECORATION: none"><span>1. Qe5+ ? Ka4 !! 2. Qe8+ Ka3 3. Qe7+ Kb2 4. Qe2+ Kb3 ! -+</span></span><br /> <span style="TEXT-DECORATION: none"></span><u><span>Solution</span></u><span style="TEXT-DECORATION: none"><span> :</span></span><br /> <span style="TEXT-DECORATION: none"></span><span style="TEXT-DECORATION: none">1. Qf5+ ! Kb4 !</span><br /> <span style="TEXT-DECORATION: none">2. Qf8+ Kb3</span><br /> <span style="TEXT-DECORATION: none">3. Qb8+ Kc2</span><br /> <span style="TEXT-DECORATION: none">4. Qh2+ Kb1</span><br /> <span style="TEXT-DECORATION: none">5. Qg1(h1)+ !</span><br /> <span style="TEXT-DECORATION: none"></span><span style="TEXT-DECORATION: none"><span>5. Qh7+ ? Qc2 ! -+</span></span><br /> <span style="TEXT-DECORATION: none"></span><span style="TEXT-DECORATION: none">5.... Kb2</span><br /> <span style="TEXT-DECORATION: none">6. Qh2+ !</span><br /> <span style="TEXT-DECORATION: none"></span><span style="TEXT-DECORATION: none"><span>6. Qg2+ ? Ka3(b3) ! -+</span></span><br /> <span style="TEXT-DECORATION: none">6.... Ka1 !</span><br /> <span style="TEXT-DECORATION: none">7. Qg1+ !</span><br /> <span style="TEXT-DECORATION: none"></span><span style="TEXT-DECORATION: none"><span>7. Qh1+ ? Qb1 ! -+</span></span><br /> <span style="TEXT-DECORATION: none"></span><span style="TEXT-DECORATION: none">7.... Qb1</span><br /> <span style="TEXT-DECORATION: none">8. Qd4+ </span><span style="TEXT-DECORATION: none"><span>and wins the pawn c4 =</span></span><br /> <span style="TEXT-DECORATION: none"><span>8. Qa7+ is a loss of time.</span></span><br /> <br /> <br /> <br /> <br /> <br /> </font></font></font>