1.Bishop is usually stronger than knight in open positions. Knight is better then bishop in closed positions, when bishop is restricted. In semi open position, when knight has supporting square (reinforced by pawn) in the center, and can’t be attacked with the opponent’s pawn - knight excels bishop and almost equal to a rook.
2.Passed pawns should be advanced as rapidly as possible.3.Move your rook to the open file.
4.Doubled, isolated and blockaded pawns are weak: avoid them!
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