how to play chess endgames book

274 How TO PLAY CHESS ENDGAMES
Exercises (Solutions on pages 343-4)
B
El7.11 */
White played l @d5. to counter I .. .:!!gs+
with 2 e5+. Was that clever or not?
17.11
M.Blumich - S.Tarrasch
Breslau 1925
resigned. Do you see the flaw in Tarrasch's
analysis?
1 ... a3 2 llg3 !ta4 3 h7 a2 4 llgl llg4+!!
Tarrasch overlooked this move in his calculations.
reckoning instead on 4 ... llh4? 5 h8\W
l;txh8 6 ~8 @b5 7 llal +-.
5 X:txg4 al'&+
White cannot avoid the perpetual check.
Exercises
(Solutions on page 344)
El7.12 /***
Black played I ... '1Yfr'f4, planning to put his
queen on b8. What do you think of this idea?
D) Premature Resignation
Resign only if you are absolutely sure that your
position is hopelessly lost. If there is any room
for doubt, it can do no harm to make a few more
moves, which is exactly what did not happen in
the following examples.
In the following diagram, Black worked out
the variation 1...a3 2 Xlg3 l;ta4 3 h7 a2 4 l;tgl
al'&+ 5 Iha! l;txal 6 h8'& and therefore he
E17.13 **/
Here White calculated the variation l ~fS
@xc4 2 @xf6 "1?b3 3 @gS @xa3 4 @xhS @b3
5 @g6 a4 6 h4 a3 7 hS a2 8 h6 al'& -+ and
therefore resigned. W at did he overlook?