p.51"In general, the mobility of the pawns [King and Pawn Endings]
is more important than their number. Two connected passed pawns are more valuable than 'sextuplets' (six pawns on one file).
This is why White can win in a blocked position only if he can get his pawns moving, which is usually possible only if he
has the opposition."
p.179"Any piece is good or bad according to its mobility."
p.203"We have repeatedly emphasized that mobility is the decisive
factor in all phases of chess."
p.235"All chess theory is based on the concept of mobility: one
piece is stronger than another if it can cover more squares; one position is preferable to another if the pieces act together
more harmoniously and do not get in one another's way. This consideration is the key to questions of positional advantage
in general, but is especially applicable to the case of bishop vs. knight. A knight in the center covers eight squares; a
Bishop thirteen. It is only because the knight can cover squares that the Bishop cannot reach that the discrepancy is not
more marked."
p.392"The criterion by which we can judge whether one rook is better
than another is its degree of mobility: its freedom of action and the number of squares it can control."
p.411"Exposed Pawns: ...The main disadvantage to these weak pawns
is not so much that material is lost sooner or later - sometimes this happens only after long and complicated maneuvering
- but that defending them limits the mobility of the defending pieces."
p.421"Doubled Pawns: In pawn endings, doubled pawns that are qualitatively
inferior - i.e., held in check by a smaller number - are a serious handicap, but even when they do not produce a passed pawn
their lack of mobility is often fatal."
