1.Rd5+
1.Rxg5 ? e1=Q -+
1…Kc3 2.Re5
2.Rc5+ is a  loss of time.
2…Kd3 3.Re8 !
3.Rd5+ leads to a loss of time : 3…Ke4 ! 4.Rd8 ! (4.Rxg5 ? e1=Q -+) 4…g4
5.Re8 Kd3 6.Rd8+ Kc2 7.Re8 Kd1(2) etc as in main line.
3.Re6(7) ? g4 -+ (see comment at move 9).
3… g4 4.Rd8+ Kc2 5.Re8
5.Rc8+ is another loss of time.
5…Kd1(2) 6.Rd8+ Ke1 7.Kc4 !
7.Rg8 ? g3 -+
7…g3
7…b5+ ? 8.Kd3 Kd1 9.Ke3+ +-
8.Kd3 !
8.Rg8 ? Kd2 ! -+
8…g2 9.Ra8 !
After 3.Re6(7) ? white rook cannot reach a file.
9.Rg8 ? Kd1 ! 10.Ra8 e1=S+ ! -+
9…Kf2
9…g1=Q ? 10.Ra1+ Kf2 11.Rxg1 Kxg1 12.Kxe2 +-
10.Rf8+
10.Ra1 ? e1=Q ! -+
10…Ke1 11.Ra8 Kf2 12.Rf8+ Ke1 positional draw.   (Authors)