1.e7! 1.Qe4+? Kh2 2.e7 Re6 -+ 1…Rc8! 1…Rf5+ 2.Ka4 Ne6 3.Qe4+ Kh2 4.Qxf5 +- 2.Qe4+! 2.e8Q? Rb8+! 3.Kc5 Rc2+ 4.Kd6 Nf7+ 5.Ke6 Kh2 6.h5 g2 7.Qh4+ Kg1 8.Kxf7 Rf2+ and 9…Kf1= 2.Qxg4? Rb8+ 3.Kc5 Rc2+ 4.Kd5 Rd2+ 5.Kc5 Rc2+ = 2…Kh2 3.e8Q Nf7! 3…Nc6 4.Q8e6! (4.Qd7? Rb2+ = ; 4.Qxc8? Na7+ =) 4…Rb2+ 5.Ka4 Rcb8 6.Q4xc6 +- (thanks to the control of a2 square). 3…Rb8+ 4.Kc4 Rc8+ 5.Kb3 Rb8+ 6.Ka3 +- 4.Q8e6(7) 4.Qxc8? Nd6+ = 4…Re8! 5.Qxe8 if 4.Q8e6 was played, now 5.a7? fails : 5…Rxe6 6.Qxe6 g2 7.Qxg4 Nd6+ 8.Ka4 (8.Kc6 Rf8 9.Qb4 g1Q 10.Qxd6+ and, eg, Kh3 11.Qxf8 Qxa7=) 8…Rf8 9.Qb4 Kh1 10.Qxd6 g1Q 11.Qxf8 Qd1+ 12.Kb4 Qd2+ 13.Kb5 Qd3+ 14.Kb6 Qb3+ 15.Kc7 Qc4+ 16.Kd7 Qg4+ 17.Ke7 Qb4+ 18.Ke8 Qa4+ 19.Kf7 Qc4+ 20.Kg7 Qg4+ 21.Kh6 Qxh4+ = 5…Nd6+  6.Kb4! 6.Ka4? Nxe4 7.Qe5 Nc3+! 8.Qxc3 and, eg, 8…g2= 6…Nxe4 6…Nxe8 7.a7 g2 8.Qxg2 Rxg2 9.a8Q Nf6 (9…Re2 10.h5 g3 +-) 10.a6 g3 11.Qc6 Nh5 12.Qc5(g6) Re2 13.a7 g2 14.a8Q g1Q 15.Qxg1 +- or 12…Rb2+ 13.Ka3 Rb8 14.Qxh5 g2 15.Qe5+ +- 7.Qe5! 7.Qxe4? g2 8.a7 g1Q 9.a8=Q Qc1!! 10.Kb5 Rb2+ 11.Ka6 Qf1+= 7.a7? g2 8.a8Q g1Q 9.Qaxe4 Qc1!! 10.Q8e5+ (10.Q4d4 Qb1+ =) 10…g3 11.Qc4 Rb2+ 12.Kc5 Rc2 13.Qe2+ Rxe2 14.Qxc1 Rf2(g2)=

with:

A) 7…Rf6

8.h5!

8.a7? (8.Qxe4? g2 9.Qxg4 g1Q=) 8…Ra6 9.h5 Rxa7 10.h6 Sf2 11.Qf5 Sh3 12.h7 Rxh7 13.Qxh7 g2= or 11.Qd6 Kh3 12.Qg6 g2 13.h7 Rxh7 14.Qxh7+ Kg3= 

8…Rxa6

9.h6!

9.Qxe4? g2 10.Qxg4 g1Q 11.Qe2+ and, eg, 11…Kg3 12.Qxa6 Qe1+ =

9…Rxh6

10.Qxe4 Rh4 

10…g2 11.Qf4+ and 12.Qxh6 +- 

11.a6 11.Qe1? Rh5! 12.a6 g2 13.a7 g1Q 14.Qd2+ Kg(h)3 15.a8Q and, eg, 15…Qb6+ 16.Ka3 Qc5+ = 11…g2 12.a7 g1=Q 13.a8Q and White wins, eg 13…Qf1 14.Qad5 Qf3 15.Kc4 Kg2 16.Qd2+ Kh3 17.Qxf3+ gxf3+ 18.Kd3 +-   B) 7…Rf7    8.h5 Nf2   9.Kb5! 9.Kc4? Nh3 10.a7 Rf4+ 11.Qxf4 Nxf4 12.a8Q g2 = 9…Nd3 10.Qg5! Kh3 10…Nf2 11.h6 g2 12.Qh5+ Nh3 13.Qxf7 g1Q 14.a7 Qb1+ 15.Kc5 Qc1+ 16.Qc4 Qe3+ 17.Qd4 +- 11.a7! 11.h6 g2 12.h7 Rxh7 13.Qf5 g1Q 14.Qxh7+ Kg2(3)= 11…Rxa7 11…g2 12.Qe3+ Rf3 13.Qd4 Rf5+ 14.Kb6 Nf2 15.Qa1+- 12.h6 and White wins : 12…Kh3 13.Qh5+ +- ; 12…g2 13.Qh4+ +-   Note : a part of the study (from black 1st move 1 till black 5th move) is known, with reverse colors, from a study by same author (5-6th prize, Garcia JT-70 2018) : W: Ka7,Rc7,Rf4,Ne1,b5,b6 B: Kg3,Qd5,Nf1,a5,d2,f7,h5 1.Rf3+ Kg4 2.Rxf1 d1Q 3.Nc2 Q1d2 4.Rd1 Qxd1 5.Ne3+ …