Tactics: Attacking with a4!?
White has a lot of pieces pointed at the Black King, but how to turn that into a win?
Of course, not this...
Spoiler: Highlight to view
Not 28.h6?? g6-/+ when Black's K is safe and White has to give up material to save the B.
The first move is...
Spoiler: Highlight to view
28.Bxh7!! Kxh7 White is winning, but the next part is hard.
Right idea, wrong exectution:
Spoiler: Highlight to view
In the game, White contined with a mistake which gave Black a way to save the game.
29.e5?
The wrong execution of the right idea. Black has two moves which save the game:
29...Bxe5! is the simple defence, and looks good enough for equality.
29...Qd5! is the tricky defence, and probably the better choice if Black (the higher rated player) wants to keep winning chances. The Qd5 attacks the Rh1 and forces White to defend against a back rank mate.
Instead, in the game Black blundered with:
29...dxe5?? and lost to
30.Qf5+ The only move! White is now winning)
30... Kg8 (30...Kh8 31.h6+-) 31.Qxf6 Kf8 32.Rxg7 Qd5 33.Rc1! Rd6 34.Qg5! f6 35.Qh6 1-0
Solution:
Spoiler: Highlight to view
From the diagram, White wins as follows:
28.Bxh7!! Kxh7
As in the game.
White wins by cutting off the Black Q's defence of the 5th rank to allow Qf5+, which forces the Black K back and attacks the Bf6 so that h5-h6 will create two threats: opening the h-file and undermining the Bf6.
29.b4! only move: White enables Qf5+ by pushing the Black Q off the 5th.
If 29...Qf2 30.Rg2 only move +-.
If 29... Qb5 30.a4! Qxa4 31.Qf5+ Kh8 32.h6 +- Bxc3 33.hxg7+ Kg8 34.Rh8#.
Calling a4 a "Miss-deflection" is, of course, a weak joke.
Serious players might want to seriously think about how to classify this sacrifice more seriously:
- is it a destructive sacrifice (Bxh7)?
- a clearance sacrifice (the B frees f5 for the Q)?
- a deflection (b4)?
- a deflection sacrifice (a4)?
- or is it a "combination" of all four?
From:
Davaaochir Nyamdorj - Mahiro Abe
WYCC U18, Durban
2014.09.23
This game, along with 14 others from the 2014 WYCC, with notes from IM Deen Hergott and IM Nikolay Noritsyn, will appear in the next issue of Chess Canada, the CFC's online newsletter.