how to play chess endgames book

254 How TO PLAY CHESS ENDGAMES
31 @g4 lllf5 =) 26 ... @b7 (26 .. .!!b7 27 l!d8+
@a7 28 i.f6 +-) 27 i.d8 l!c8 28 l!d7+ @b8 29
@f4 @a8 30 i.c7 +-.
26.l!d8+@b7 (D)
15.11
D.Sahovic - E.Kengis
Biel 1990
The following could equally well appear in
the section on the power of the pawn:
27 i.f6!! g6
After 27 ... gxf6 the passed h-pawn and/or invasion
by the white king is decisive: 28 exf6
l!c8 (28 ... lllh4 29 @g4! lllf5 30 @g5 l!c8 31
l!xc8 @xc8 32 h6 +-) 29 l!xc8 @xc8 30 @g5
@d7 31 h6 lllxh6 32 @xh6 e5 33 @h7! e4
(33 ... @e6 34@g7 a3 35 f3 +- - it is zugzwang)
34 @g7 @e6 35 a3 (zugzwang) +- (Lukacs).
28 hxg6 fxg6 29 @gS 1-0
Bareev resigned in view of 29 ... l!c8 30 l!d7+
l!c7 31 l!d3 (31 'fl.xc7+?@xc7 32@xg6 @d7
is an impregnable fortress) 31...l!f7 32 @xg6
l!f8 33 l!d7+ @c8 34 l!h7 @b8 35 l!h5 llld4
36 l!h4 lllf5 37 .!!f4 @c7 38 1!xf5 exf5 39 e6
+-.
Bla) Widening the Operational
Front
This technique is closely related with the principle
of two weakness. If you are unable to
make progress on one wing or in too tight a
space, you should always explore the prospects
of opening additional fronts, if possible.
In the following example, in order to win,
White must penetrate on the kingside:
1 f4! f6 2 rs @e7 3 @e2 lllc4 4 i.b5 lllb6 5
@f3 @f7 6 @g4 llla8
6 ... @g8 7 @h5 '&'h7 8 g4 llla8 9 i.e8 lllb6 IO
b5 lllc4 11 g5 hxg5 12 hxg5 lllb6 13 i.c6 lllc4
14 i.d7 with the plan of i.e6, g6+, @g4-f3-
e2-d3-c3-b4-a5 and .il.d7 +- (Kengis in Informator).
7@h5 lllb6 8 g4 llla8 9 i.d7 lllb610 i.e6+
@£8 11 @g6 lllc4 12 bS lllb6 13 gS hxgS 14
hxgS fxg5 15 'it>xg5 @e7 16 @g6 'M817 i.f7
llld7 18 i.e8!! 1-0
Kengis resigned due to the line 18 ... lllb6
(18 ... @xe8 19 @xg7 +-) 19 i.c6 lllc8 20 f6
gxf6 21 @xf6 lllb6 22 @e6 lllc4 23 .il.d7 @g7
24 @e7 @g6 25 .lrl.g4 @g5 26 i.e2 +-.
15.12
A.Karpov - Z.Ribli
Bath Echt 1973