What is your best definition of Key Squares in King and Pawn vs King Endgame Theory? Please provide graphics if possible. Is there a difference between "Key Squares" and "Critical Squares" or are these terms interchangeable?
The terms Key Squares and Critical Squares are sometimes used interchangeably in chess literature on
2nd through 4th Ranks
In this example image the Key Squares for the white pawn are
A Pawn that Crosses the 5th Rank has More Key Squares
In this image the pawn on
The Rooks Pawn are Exceptions
These positions show a draw regardless of which side has the move.
In the first position Black can simply shuffle his king between
Endgame Simulations (against a computer)