In the endgame, an error can be decisive, and we are rarely presented with a second chance.
Even the best grandmasters in the world have had to work hard to acquire the technique of rook endings.
In complicated positions, Bobby Fischer hardly had to be afraid of anybody
An innovation need not be especially ingenious, but it must be well worked out.
I was unlucky, like my country.
However hopeless the situation appears to be there yet always exists the possibility of putting up a stubborn resistance.