Exercise 1 solution :
If 25...h5?! there follows 26 Bxa6
25...Rdg8
26. g3
It is not good for white to play 26 a5 b5 or 26 Qxe6 Rg6 followed by Rh6. If 26. Bxa6 then black wins by 26...Rxg2 27 Kxg2 Rg8+ 28 Kh3 Qf4 29 Qh5 Bg1
26...h5
27 Kxh2 h4
28 Kg1 hxg3
29 fxg3 Rxg3+
30 Bxg3 Qxg3+
31 Qg2 Qe3+
32 Kf1 Qxd3+
33 Kf2 Qd2+
34 Kf1 Qf4+
35 Ke1 Qc7
36 Rc1 Rh2 and white resigns
Exercise 1 solution :
If 25...h5?! there follows 26 Bxa6
25...Rdg8
26. g3
It is not good for white to play 26 a5 b5 or 26 Qxe6 Rg6 followed by Rh6. If 26. Bxa6 then black wins by 26...Rxg2 27 Kxg2 Rg8+ 28 Kh3 Qf4 29 Qh5 Bg1
26...h5
27 Kxh2 h4
28 Kg1 hxg3
29 fxg3 Rxg3+
30 Bxg3 Qxg3+
31 Qg2 Qe3+
32 Kf1 Qxd3+
33 Kf2 Qd2+
34 Kf1 Qf4+
35 Ke1 Qc7
36 Rc1 Rh2 and white resigns