A pawn that is not opposed by an enemy pawn either on its own file or adjacent files.
ECHESSPEDIA
Quotes of the Day
There is no room for gallantry in chess.
Irving Chernev
Tal develops all his pieces in the centre and then sacrifices them somewhere.
David Bronstein
To Put It Mildly, I Have Not a Bit of Respect For Topalov
Vladimir Kramnik 2015
Carlsen simply plays chess well. It seems to me that in such cases people are inclined to look for some supernatural explanation, although the simplest explanation is also the most appropriate: the guy simply plays chess well.
Alexander Grischuk 2014
When I am White I win because I am White. When I am Black I win because I am Bogoljubov.
Efim Bogoljubov