Eduard Eilazyan (Ukraine)
Black’s material advantage is compensated by the presence of a strong passed pawn and the active position of the w-King.
Plan A is connected with the use of the passed c-pawn. But before advancing the c-pawn, White must take control of the b6-square:
1.Nbc4+ dxc4! (But not 1…Kf4? because of 2.c6! Nf6 3.Nd6! Nf2 4.Nxf7! (4.fxg6? fxg6! Theme in Black’s game. (Thematic try (TT) 4…hxg6? 5.Nxf7=) 5.Nf7 Ne8–+)
4…Ne8 5.fxg6 hxg6 6.Ng5 Ng7 7.Nh3+=) 2.Nxc4+ K~ 3.c6 Nb6 4.Nxb6 Ne3 5.fxg6 hxg6 6.c7 Nf5+ 7.Kg5 Nd6=.
The same results are obtained after 1.Ndc4+ dxc4! 2.Nxc4+. This is not a thematic choice of the knight’s move on the c4 square, this is a dual. And since the dual on the 1st move is unacceptable, the move 1.Nc4+ (with any knight!) cannot be a solution! But why? And here is the answer:
1.Nc4+? dxc4! 2.Nxc4+ Kf4! 3.c6 Nf6 4.c7 Nf2 5.c8Q the goal has been achieved, but 5…g5#! Plan A turned out to be a Try. Therefore, White carries out
Plan B, connected with the use of the active position of the w-King.
Try: 1.fxg6? (Study in study. Black to moves and wins) 1…hxg6! Theme in Black’s game.
TT-1: 1…fxg6? 2.Nf1+ Ke2 3.Ng3+ Kd2 4.Nf1+ Ke1 5.Nxd1 Nxc5 6.Nfe3! Theme in White’s game. TT-2: 6.Nde3? d4 7.Nc2+ Kxf1 8.Nxd4 Kf2–+ (pos. P1, see Thematic try-3) 6…d4 7.Nc2+ Kxd1 8.Nxd4 Kd2= (pos.P2, see solution) 2.Nf1+ Ke2! 3.Ng3+ Kd2! 4.Nf1+ Ke1! 5.Nxd1 Nxc5! 6.Nde3 (or 6.Nfe3 d4! 7.Nc2+ Kxd1! 8.Nxd4 Ne6! 9.Nc6 f5! 10.Ne7 g5+! 11.Kg3 f4+! –+) 6…d4! 7.Nc2+ Kxf1! 8.Nxd4 Ne6! 9.Nc6 f5! 10.Ne7 g5+! 11.Kg3 f4+! 12.Kf3 Nd4+ –+.
1…Ke2 2.Ng3+ Kd2 3.Nf1+ Ke1 4.Nxd1 Nxc5 5.Nfe3!
Theme.TT-3: 5.Nde3? d4 6.Nc2+ Kxf1 7.Nxd4 Kf2 8.fxg6 fxg6! (pos. P1) Theme in Black’s game. TT-4: 8…hxg6? 9.Nc6 Ne6 10.Ne5 g5+ 11.Kg4 =. 9.Kg5 h5 10.Kh4 Nd3 11.Ne6 Ne1! 12.Nf4 Ng2+ –+(or 11.Nc6 Ne1! 12.Ne5 Nf3+ –+).
5…d4 6.Nc2+ Kxd1 7.Nxd4 Kd2 8.fxg6 fxg6 (pos. P2)
(or 8…hxg6 9.Nf3+ Ke3 10.Ne5=)
9.Kg5! Ke3 10.Nc2+! Ke4
10…Kd3 11.Nb4+! Ke4 12.Kh6 Ne6 13.Kxh7=.
11.Kh6 Nd3 12.Na1!
12.Na3? Ne5! 13.Nc2 Nf3 14.Kxh7 g5 15.Kg6 g4 –+.
12…Kf4 13.Nc2 g5 14.Ne3 Kxe3 15.Kxg5 Nf4(e5) 16.Kh6 =.
Themes: Change of plan. Change of try in TT-1 and TT-4.
Implementation of a given theme in White’s game and in Black’s game (study in study).