1.Ng4!
[ 1.Qa8+? Kg7! 2.Qa1+ Kg8! 3.Qa2+ Kf8! ( 3...Kg7? 4.Qb2+ Kg8 5.Qb8+
Kg7 6.Qc7+ Kg8 7.Qd8+ Kg7 8.Qe7+ Kg8 9.Nf3 Rf5 10.Qe6+! Kg7
11.Ne5 f3+ 11.Kf2 Rhf8 12.Qxg6+ Kh8 14.Qxh6+ Kg8 15.Ng6! +- )
4.Qa8+ Kg7 5.Qb7+ Kf6! 6.Qc6+ Ke7(Kf7) 7.Qe4+ Kf7 8.Qc4+ Ke7
9.Qc7+ Ke6 10.Nf3 Re8(Rf8) = ]
1...Rf5 2.Qc6!
[ 2.Qa8+? Kg7! 3.Qa1+ ( 3.Qa7+ Rf7 = ) 3...Kg8! 4.Qa2+ Kf8! ( 4...Rf7?
5.Ne5 f3+ 6.Ke3 Rhh7 7.Nxf3! +- ) 5.Qa3+ Kf7! 6.Qb3+ Ke7! 7.Qb4+
Ke6(Kf7) = ]
2...f3+ 3.Ke3!!
[ Thematic try 3.Kf2? Kg7 4.Qc7+ Rf7 5.Qe5+ Kg8 6.Nf6+ Kf8 zz 7.Nd7+
Kg8 8.Qe6+ Kg7 9.Qe5+ Kg8 10.Nf6+ Kf8 11.Qd4 Kg7! 12.Nh5+ Kg8
13.Nf6+ Kg7 14.Ne8+ Kg8 = ]
3...Kg7 4.Qc7+! Kg8 5.Qd6
[ Also 5.Qd8+ Rf8 6.Qd5+ Kg7 ( 6...Rf7 7.Ne5 Rhh7 8.Nxf3! +- ) 7.Qe5+
Kg8 8.Qe6+ Kg7 9.Qe7+ Rf7 etc., taking one move longer ]
5...Kf7
[ 5....Rf7 6.Qxg6+ Kf8 7.Qd6+ Kg7 ( 7...Kg8 8.Nf6+ Kg7 9.Nh5+ +- )
8.Ne5 Re8 9.Qg6+ Kh8 10.Qxh6+ Kg8 11.Qg6+ +- ]
6.Qd7+ Kf8 7.Qd8+ Kg7 8.Qe7+ Rf7
[ 8...Kg8 9.Nf6+ Rxf6 10.Qxf6 Rh7 11.Qd8+ +- ]
9.Qe5+ Kg8 10.Nf6+ Kf8 11.Kf2! zz
MAIN 11...Kg7 12.Nh5+ Kh7 13.Qg7+! Rxg7 Nf6 model mate.
MAIN 11...h5 12.Ne4! Rhh7 13.Ng5! Rhg7 14.Qd6+!
[ Thematic try 14.Ne6+? Kg8 15.Nxg7 Rxg7 draw with bP on h5 ]
14...Kg8 15.Qd5 h4 16.Qe6! zz Kf8
[ 16...h3 17.Ne4! Kh7 18.Qxh3+ Kg8 19.Qe6 +- ]
17.Qc8+ Ke7 18.Qc5+ Ke8
[ 18...Kd7 19.Qd4+ Ke7 20.Qe5+ etc. ]
19.Qb5+ Ke7
[ 19...Rd7 20.Ne6 Rgf7 21.Nc5 +- ]
20.Qe5+ Kf8 21.Ne6+ Kg8 22.Nxg7 Rxg7 (win with bP on h5)
23.Qe8+! Kh7 24.Kxf3 Rc7 25.Qf8! wins.
