how to play chess endgames book

THE BISHOP-PAIR
IN THE ENDGAME
163
B
E9.12 /**
How did the game finish?
G) Two Bishops against
Rook and Minor Piece
In the endgame it is sometimes not clear which
of these combinations of pieces is the stronger.
It generally depends on the other material or on
positional factors.
This is better than:
a) Naturally 4 !!al? is wrong and serves
here only as an illustration of the power of the
bishops: 4...tbc:4 5 Ac! .ic5 6 a4 i.d4 7 !ia2
Ae3 8 ~al Axel 9 ~xcl lba5 -+.
b) 4 ~xd6? Axd6 5 .tel g5 6 fxg5 fxg5 7
.ixg5 (7 Wf2 .ixf3 8 Wxf3 Af4 -+) 7 ... i.a3 8
Wf2 c I~ 9 Axel Axe I should be theoretically
lost, but not within the limits of the 50-move
rule. Of course, I (KM) am not claiming that I
would have won it.
c) 4 ~fl?! lbb5 (4 .. .ll:ic4? 5 Acl Axel 6
~cl lbd2 7 1:Ixc2! is not Black's intention) 5
Wg3 (5 Ac!? Axel 6 ~xcl lbc3 -+) 5 ... Ad3
(5...lbc3 6 lbd4 Ab2 7 Acl! Axel 8 ~xcl
lbxa2 9 1:Ixc2 =) 6 ~el lbc3 7 lbd4 i.b2 8
lbxc2 (8 Wf3 lbxa2 9 lbb3 +) 8 ... .ixc2 9 Ad4
Aa4 =.
4 •.. Ab4 (D)
If 4 ... lbc4? 5 i.c I Axel 6 ~xcl lbd2 then,
as in the variation with 4 ~fl, comes 7 &c2!.
After 7 ... lbxf3 8 ~c7+ Wg6 9 Wf2 only White
has winning chances, since his rook is very
powerful on the open board. This stands in
marked contrast to the note to White's 7th move.
after which the white rook is completely dominated,
even though there is only one additional
minor piece left on the board. This is in accordance
with the general rule of thumb, that the
side playing against the rook should not exchange
pieces. Generally. the more open and
empty the board. the stronger the rook.
I.Hausner - K.Mi.iller
Hamburg 1990
Black's dangerous passed pawn enables him
to play for a win without any risk.
l Axa7?!
This is very risky. After I Wf2!? White
should not be worse; for example, 1.. .hxg4 2
hxg4 c3 3 .ixc3 .ic2 4 We2 =.
1...hxg4 2 hxg4 c3 3 .ie3 c2 4 !let!
5~e2
Or: