Nimzowitsch explained this as a protected piece on the opponent’s side of the board that cannot be attacked by a pawn.
Karpov, Anatoly vs Kasparov, Garry 1-0 World Championship 35th-KK5 Rnd:17
Lyon/New York 1990.12.05
ECHESSPEDIA
Quotes of the Day
Unfortunately this gentlemanlike behaviour among chessplayers is out of fashion. It’s my principle that you should respect your opponent as much as you respect yourself.
Lajos Portisch 1990
The Golden Age, when machines were weak and my hair was strong!
Garry Kasparov 2017
When you see a good move, look for a better one
Emanuel Lasker
” Chess is most certainly not my life.”
Tony Miles
If I’m thinking for more than 20 minutes about one move, it’s usually a waste. Sometimes you can come up with some amazing solution but most of the time you just end up looping: you consider a move, you reject it, then you’re desperate, you come back to the move, you don’t remember why you rejected it, you have to make a move so you make it – then your opponent replies and you remember why you rejected it. The longest wait I ever did between moves was one hour and five minutes – and the move was horrible.
Magnus Carlsen 2016