The Principle of two weaknesses in Chess -1-

A weakness is a kind of vulnerable point in a chess position. In this example, it is the two black pawns on c5 and g5. This is because the white bishop can attack both pawns and force the black bishop into defense.
But Black not only has two pawn weaknesses here, but also two square weaknesses. This is because if the white king moved to d5 or f5, a pawn would also fall.
Currently, Black is able to defend all weaknesses. However, if it were Black's turn, a pawn would be lost. White, whose turn it is, can attack the weaknesses, but cannot exploit them profitably.
However, this is more of an exception to the rule. Normally, the following applies:
One weakness can usually be defended well, but two weaknesses often lead to defeat.

We will now look at some very clear examples of how two weaknesses in the opponent's camp can be successfully exploited despite good resistance.
We will see that the following methods, among others, are frequently used:
1. Zugzwang
2. King activity
3. Free pawn formation
4. Breakthrough via piece sacrifice

Continuation will follow