how to play chess endgames book

90 How TO PLAY CHESS ENDGAMES
6 ... gS 7 fxgS hxgS 8 lt:lc4 !Ih8 9 lt:leS i.e8!
The bishop is only apparently passive here.
It can be activated at any moment. But the white
knight is insecure from now on.
10 l!f2 f6 11 lt:lg4 IU8 12 c4 i.hS 13 h3
i.g614 ~d2 ~c8 15 b3 a616 a4?! aS 17 tzlf2
~h8 18 @d4 ~d8+ 19 @c3 ~xd2 20 @xd2
@d6 21 lt:ldl i.fS 22 h4 gxh4 23 gxh4 Ag6 24
@c3 fS 25 b4 axb4+ 26 @xb4 f4 27 a5 eS 28
tzlf2 e4 29 hS i.fS 30@c3 e3 31 tzld3 f3 32 cs+
@c7 33 lt:lb4 Ae4 34 h6 f2 35 h7 fl~ 36 h8'&
~al+0-1
Sometimes it can be a question of gaining
time, or being able to carry out a different plan.
10 ... i.xe2 11 @xe2 @e7 was indicated.
11 AbS lt:ld3+ 12 @g3 !!d8 13 ~c7 lta8 14
lt:lc4 lt:lb4 15 ~xb7 Ad3 16 tzleS .11.fS 17 lt:ld7+
@g8 18 an lt:ld3 19 ~b8+ ~xb8 20 lt:lxb8
lt:lcS 21 a6 lt:la4 22 it:ld7 1-0
But reducing the opponent's attacking potential
and limiting counterplay generally constitute
the main reason for exchanging rooks.
4.13
B.Gelfand - R.Felgaer
Khanty­Mansiisk FIDE Wcup 2005
White wants to open the queenside and therefore
removes a pair of rooks from the board.
1 ~xd8+ ~xd8 2 b4 ~d4?
2...lt:ld5 3 tzlxd5 ~xd5 4 bxa5 !!xa5 5 .i.b5
e5 6 !tel lla.8 7 ~c7 l!b8 offered better survival
chances.
3 bxaS lt:lxa4 (D)
4lt:ldl!
Naturally White avoids the exchange, to retain
more winning potential.
4...~d2
4...~d7 5 !Icl f5 6 ~b5 f!d4 7 lt:le3 +-.
s @fl ~d7 6 ~cl rs 7 exfS?
7 @el fxe4 8 ~c4 +-.
7 .•. i..xfS 8 lt:le3 Ad3 9 @f2 lt:lb2 10 f!c3
~g6?
4.14
K.Sakaev - Y.Melster
Russian Chr (Sochi) 2004
Meister draws the teeth from White's counterplay
right away:
1..J!hS!!
Without his rook White is completely defenceless.
2l'!xh5
2 ~e I @f7 3 !!d I ~h2 4 ~d3 ~b2 also wins
for Black.