<p><font size="2" face="Verdana" color="#008000"><strong>1 Bc5! <br /> </strong>Threats 2 Bc4 (threats 3 Bxe6 and also 3 Bd5+ Kb8 4 a7+ and 5 a8=D) Re5 3 Kb6 (threats 4 Bd6 Rg5 5 Be6 Rf5 6 Bc8 Rb5+ 7 Kxb5 Ka7 etc.)    </font><font size="2" face="Verdana" color="#008000">Rg5 8 Bd6 Re5 9 Bb3 (tempo) Rg5 10 Be6 etc. <br /> <strong>1… Re5! <br /> </strong>Rook must control e4 and f5 (if 1… Re8 or Re1 2 Bf5! etc.) <br /> <strong>2 Kb6 Re6+ 3 Kc7 <br /> </strong>Always threatening 4 Bc4 : if 4… Re5 5 Kb6 Rg5 6 Bd6 etc. <br /> <strong>3… Re8 4 Kd7! <br /> </strong>Not 4 Bc4? Rc8+!! 5 Kd6 Rd8+ 6 Ke5 Kb8 with mate too late. <br /> <strong>4… Re5! <br /> </strong>Rook must continue to guard e4 but is dominated on file e : if 4… Re1? 5 Bd4!! Kb8 and for example 6 Bc2 Re2 7 Bb3 Re4 8 a7+ Kb7 9 Bd5+ Ka6 10 Bxe4 with quick mate.<strong> <br /> 5 Kd6 Re8 <br /> </strong>If 5… Re1? 6 Bc4 Rd1+ (or Ra1) 7 Kc7 Rd2 8 Bb5 Rd7+ 9 Kxd7 and quick mate ; or 6… Kb8 7 a7+ Kb7 8 Bd5+ Ka6 9 a8=D+ etc. <br /> <strong>6 Bg6! <br /> </strong>Not 6 Bc4? Rd8+! as previously (a kind of Roman/anti-Roman). <br /> <strong>6… Rd8+ 7 Ke7! Rg8! <br /> </strong>Now Rook must stay on 8th rank (if 7… Rd2 or Rd1? 8 Be4+ Kb8 9 a7+ Kc7 10 a8=D Rd7+ 11 Ke6 for example, with quick mate). If 7… Rh8? 8 Be4+ Kb8 9 a7+ Kc7 <br /> <strong>10 Bd6+ Kb6 11 Bb8 Kc5</strong> (if Black have played Rg8, then they would play here 11… Rg7+ ; here if 11… Rh7+?? 12 Bxh7 with quick mate) 12 a8=D Rxb8 13 Dxb8 etc. <br /> If 7… Rc8?? 8 Be4+ Kb8 9 Bb6 (threats 10 a7#) Rc7+ 10 Bxc7 Kxc7 11 a7 Kb6 12 a8=D etc. <br /> <strong>8 Be4+ Kb8 9 a7+ Kc7 10 Bd4! zugzwang</strong> <br /> Not 10 Bd5!? Rh8! 11 Bd4 Rc8! and White don’t mate in 20 moves (reciprocal zugwang) ! <br /> Nor 10 Bd6+? Kb6 11 Bb8 Rg7+! 12 K plays Rxa7! (or 11 a8=D Rxa8 12 Bxa8 Kb5 13 Bd5 Ka4 with too late mate). <br /> 10… Rc8 11 Bd5! (zz) Rd8 <br /> Now Rook is completely dominated on 8th rank and will be captured.<strong> <br /> 12 Be5+ <br /> </strong>As previously 13 a8=D+? Rxa8 14 Bxa8 leads to a too late mate.<strong> <br /> 12… Kb6 13 Kxd8! Kxa7 14 Kc7 Ka6 15 Bc6 Ka5 16 Bc3+ Ka6 17 Bd7! Ka7 18 Bc8 Ka8 19 Bb7+ Ka7 20 Bd4#    </strong></font><font size="2" face="Verdana" color="#ff0000"><strong><font color="#0000ff">2 Dominations of black Rook, first on file « e », then on 8th  rank (with zz).</font> <font color="#ff0000"> Author</font></strong></font></p>