A tactical way to improve ones position. Rules don’t exist but there are many practical examples especially in endgames.
ECHESSPEDIA
Quotes of the Day
Petrosian would never have beaten me if he had played like that in 1963.
Mikhail Botvinnik 1966
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
Do you realize, Fischer almost never has any bad pieces? He exchanges them, and the bad pieces remain with his opponents.
Yury Balashov
With the modern computer age, there are some new ideas, but the principles are basically the same… I try not to over-focus on preparation.
Magnus Carlsen 2012