<p><font face="Arial" size="3">A general plan by White is 1.Ra5#, but 1…Kxd6. At moment White has not 1.Rd6. Therefore a position of Bb2 needs in improvement: </font></p><p><font face="Arial" size="3"></font></p><p><font face="Arial" size="3"></font></p><p><font face="Arial"><font size="3"><b>1. Be5!</b> (&gt;2.Ra5#) </font></font></p><p><font face="Arial" size="3"></font></p><p><font face="Arial" size="3"></font></p><p><font face="Arial"><font size="3"><b>1… Kb5 2. Bc7! Kc5.</b> </font></font></p><p><font face="Arial" size="3"></font></p><p><font face="Arial" size="3"></font></p><p><font face="Arial" size="3">Again White has not 3.Rd6? Rh5! So, 5^th line must be interfered</font></p><p><font face="Arial" size="3"></font></p><p><font face="Arial" size="3"></font></p><p><font face="Arial"><font size="3"><b>3. Shf5! gf5</b>, and now </font></font></p><p><font face="Arial" size="3"></font></p><p><font face="Arial" size="3"></font></p><p><font face="Arial"><font size="3"><b>4. Rd6!</b> is sound. </font></font></p><p><font face="Arial" size="3"></font></p><p><font face="Arial" size="3"></font></p><p><font face="Arial"><font size="3"><b>4… Rd4.</b> A field d4 is blocked, white Rook comes back: </font></font></p><p><font face="Arial" size="3"></font></p><p><font face="Arial" size="3"></font></p><p><font face="Arial"><font size="3"><b>5. Rc6+ Kb5 6. Ra6! Kc5</b>, and general plan is working – </font></font></p><p><font face="Arial" size="3"></font></p><p><font face="Arial" size="3"></font></p><p><b><font face="Arial" size="3">7. Ra5#!</font></b></p><p><font face="Arial" size="3"></font></p><p><font face="Arial" size="3"></font></p><p><font face="Arial" size="3"></font></p>