how to play chess endgames book

24 How TO PLAY CHESS ENDGAMES
B
In the very first example one king is permanently
incarcerated:
El.03 /**
How do you assess this position,
with Black to move?
El.04 **/
Is the black king strong or weak?
Find the best move for White.
A2) Cutting Off the King
Restricting the mobility of the opposing pieces
is an important endgame principle. In the following
section we shall therefore consider some
examples in which one player keeps the opposing
king away from the main area of struggle,
or even cuts it out of the game completely. If
you can keep the enemy king out of play you
usually gain a great advantage. In many cases it
is as if one side is playing 'a piece up', as it
were, since an important enemy unit is not taking
part in the battle.
1.12
I.Naumkin - A.Khalifman
USSR 1984
Opposite-coloured
bishops generally favour
the attacker. Nevertheless in this position Black
can allow the exchange of queens without suffering
any diminution of his initiative. The reason
lies in the miserable position of the white
king. He can be condemned to life imprisonment,
whereas his opposite number can slowly
but surely move into action.
l ••• ffg4! 2 '11Uxg4 hxg4 3 ~al ~d2 4 ~gdl
g3!
Closing the cell door.
S ~xd2 .bd2 6 cS?
6 ~a8+ @g7 7 ~c8 .i.xb4 8 ~xc7+ @f6 9
nx.b7 .i.c5 10 ~bl is far more tenacious.
6 ... .i.xb4 7 c6
7 ~a8+ @g7 8 ~c8 dxc5 9 .lhc7+ @f6 10
~c8 (10~xb7 c4 u an ~f4 12 ke2 nx.e4-+)
10 ... b5 11 .i.xb5 (11 ~c6+@g5 12 d6 c4 13 d7
.i.a5 -+) 11...!txe4 12 ~f8+ @g7 13 ~fl ~d4
-+.
7 .•. bxc6 8 dxc6 ~f4 9 ~bl
Exchanging rooks is no help to White, as the
following variations demonstrate:
a) 9 ~a7 ~f2 10 ~a2 nx.a2 11 .i.c4+ @g7
12 .i.xa2 .i.c5 13 .i.c4 @h6 14 .i.b3 @g5 15
sn i.b6 16 .i.c4 (16 .i.e8 d5 17 exd5 e4 18 d6
cxd6 19 .i.f7@f6 -+) i6 ... @f4 17 .i.d3 g5 18
.i.c2 .i.f2 19 .i.d3 @e3 20 .i.bl @d4 21 .i.c2
@c4 22 .i.bl 'Bb5 -+.