Chess Fundamentals

When the opponent has a Bishop, keep your Pawns on squares of the same colour as your opponent's Bishop.

Whenever you have a Bishop, whether the opponent has also one or not, keep your Pawns on squares of the opposite colour to that of your own Bishop.

advance the Pawn that is free from opposition

at least one Knight should be developed before the Bishops are brought out

In the openings, whenever possible, pieces should be moved in preference to Pawns.