how to play chess endgames book

THE BISHOP­PAIR IN THE ENDGAME 167
b4?.lil.d214ll:id4i.d315i.fli.e416a6i.xb4
17 i.g2 i.c5 18 ll:ixe6 @xe6 19 i.xe4@e5 =)
13 ... i.d3 14 .lil.fl i.e4 15 a6 @c5 (15 ... i.e5 16
ll:ib5+ @c5 17 a7 .lil.a8 18 ll:ia3 @b4 19 ll:ic2+
@xb320i.g2+-) 16a7@b617 i.g2i.xg218
'i&xg2 @xa7 I 9 lbc6+ ~b6 20 ll:id8 +-.
15 i.e8@c5 16 i.xg6 eS 17@e2 Wd4
Shutting the white king out of the top half of
the board.
18 @di i.aS 19 @c2 i.b4 20 f3 .taS 11z.112
In modem chess it is not unusual for one side
to prefer to keep the bishops, instead of winning
the exchange.
8 ••• .tb4 9 ll:id7+@e710 !bes i.c3 ll ll:ic6+
11 lbd3 i.e4 i2 lbc5 i.d5 13 i.c4@d6 14
ll:id3 i.e4 =.
n ... i.xc6
l l...@d6? J2 ll:id8 +-.
12 i.xc6 fS 13 00 fxg4 14 hxg4 (DJ
B
14 ...@d6!
As so often in opposite-coloured bishop endings.
material is here less important than positional
factors. The main consideration is the
blockade of the white queenside pawns, in comparison
to which the Joss of the g6-pawn is unimportant.
P.Tregubov - A.Kornev
Russian Ch (Krasnoiarsk) 2003
1 ••• i.xc4!
l...lbc2?! 2 ll:id5 ll:ixal (2 ... ll:ixe3 is surprisingly
answered with 3 fxe3, when White keeps
complete control) 3 l!xal f5 4 l:tbl l!f7 5 b3
lifd7 6 a4@f7 7 h4 gives White a slight but enduring
advantage.
2 Sl.xd4 l!xd4 3 b3 .lil.e6 4 l!adl fild8 5
Elxd4 l!xd4 6 Eldl l!xdl+ 7 ll:ixdl
The strong bishops should guarantee Black
the draw in this theoretically important end-
game.
7 ... fS 8 ll:ie3 @f8 9 i.dS i.d7!
Naturally Black must avoid the exchange of
bishops.
10 ll:ic2@e7 11 f3 @d6 12 .lil.g8 h6 13@f2
as 14 >&e3 @cs 15 @d3 .tes 16 e3 i.b2 17
srt
17ll:id4!?'i&d618.lil.f7g519f4We720i.c4
gxf4 21 gxf4@f6 22 a4 .lil.a3 23 i.b5 i.c8 24 e4
fxe4+ 25 @xe4 i.h3 and Black should hold.
17 •.• gS 18 f4
18 ll:id4 f4 19 gxf4 gxf4 20 ll:ic2 .lil.f5+ 21 e4
.lil.c8 22 0£ I i.a6+ 23 @d2 i.f6 24 ll:ig2 @d4 =.