<font size="4"><font face="Times New Roman"><font color="#3e6617"><b>1.Rh1!<br /> </b><br /> Thematic try : 1.Rxf2? gxf2 2.Ke2 Sb6! (b6 square is available) 3.Sg5 Sxc4 and White has to struggle for the draw.<br /> <br /> <b>1…g2!<br /> </b><b>2.Ra1+ Kb6<br /> </b><b>3.Ke2 f1=Q+<br /> </b><b>4.Rxf1 gxf1=Q+<br /> </b><b>5.Kxf1<br /> </b><br /> The difference : square b6 is not available for black Knight.<br /> <br /> <b>5…Kc5<br /> </b><br /> 5…c5(c6) 6.Sg5 Sc7 7.Sxh7 +-<br /> <br /> 5…Kc6 and, eg, 6.Sg5 Kd7 7.Sxh7 Ke8 8.Sg5 Kf8 9.c5 c6 10.Ke2 Sc7<span>  </span>11.Kd3 Kg8 12.Ke4 Sd5 13.h7+ Kf8<span>  </span>14.c4 Sf6+ 15.Ke5 Se8 16.Sf7+ Kxh7 17.Sd8+ Kg7 18.Sxb7 Sf6 19.Sd8 +- <br /> <br /> <b>6.Sg5 <br /> </b><br /> 6.Se5? Sb6 7.Ke2 Sxc4 8.f6 exf6 9.Sd7+ Kd6 10.Sxf6 Se5=<br /> <br /> 6.Ke2? Sb6 7.Sg5 Kxc4 8.Sxh7 Sd7 9.Sg5 Sf8(f6) 10.Se6 (10.h7 Sxh7 11.Sxh7 Kxc3=) 10…Sh7=<br /> <br /> <b>6…Sb6<br /> </b><br /> <b>7.Sxh7 Sd7<br /> </b><br /> <b>8.Sg5!<br /> </b><br /> 8.Ke2? Kxc4=<br /> <b>8…Sf6<br /> </b><br /> 8…Sf8 9.Se6+ +-<br /> <br /> <b>9.Se4+! Sxe4<br /> </b><br /> 9.h7? Sxh7 10.Sxh7 Kxc4 =<br /> <br /> 9.Ke2? Kxc4 10.Se4 Sh7 11.Ke3 Kd5 12.Kf4 e5+ = <br /> <br /> <b>10.h7 +-<br /> </b><br /> </font></font></font><br /> <br />