how to play chess endgames book

190 How TO PLAY CHESS ENDGAMES
Exercise
Exercise
(Solution on page 324) (Solution on page 325)
Ell.10 ***/
White to play and draw.
**********
The proximity to the comer also rescues
Black in the following configuration:
El 1.11 /*
How does Black draw easily?
B) A Secure Camp
If the defender has only a tightly restricted area
to defend, a very great material superiority does
not necessarily win.
11.15
Fortress VIII
Bl) Fortresses against a Bishop
Since the bishop can cover only half the squares
on the board, fortresses are especially common
against it. The defender needs only to dig in on
the squares of the opposite colour and then ensure
that he does not fall into zugzwang or allow
a dangerous passed pawn to be created.
Bla) Averbakh's Barrier
In the diagram on the following page, to be
able to penetrate White's camp, the black king
would have to stray too far over to the queenside.
1 ... @f6 2 @dS .tel 3 rs gs 4 @d6 .tr4+ s
@dS@e7 6 @c6 i.g3 7 @dS@d7 8 @cs Af4 9
@dS .td6 10 @e4 1'2-1'2
A draw was agreed in view of 10 ... @c6 11 f6
@d7 12 @f5 i.f4 13 @g6 @e8 14@g7 i.e5 15
@g6.