As usual Blue Devil asked me a very good question which isn't so simple to answer.
If it is about accidents and endgame, where does strategy come in? Is middlegame and endgame strategy different? I know activity is the God of strategy. Is this different in the middle or endgame?
- King attack
- Second weakness
- Fighting methods
You cant' force accidents. Trying to play for accidents is hope chess. Accidents concern pieces. Pieces are too volatile to haunt. You only can shoot a sitting duck.
The king is a target that is always good. It is a sort weakness. A king moves slow. A king is a potential sitting duck. According to Nimzowitch you can only have a succesfull king attack when your opponent makes serious mistakes.
A pawn moves slow. Fixate it. A fixed pawn is a sitting duck. A pawn that can't be protected by another pawn and that can be attacked is a weakness. A second weakness is always a pawn. You can only pick up a pawn in the middlegame when your opponent makes a serious mistake.
Only recently I discovered strongpoints. I read about it in chapter 15 of My System. A strongpoint is a pivotal point where your attackers converge. For instance the famous invasion square. We will talk about it later.
When the pieces are traded off the leftovers of the middlegame in the form of accumulated advantages remain. Always play with your doggybag in mind.
The final goal in the middlegame is: create leftovers. Does your opponent make mistakes along the way? All the better, you don't need an endgame. But if he does not, the content of your doggybag is all you got.
The endgame has a definite different goal: queen a pawn. The king is no longer a weakness, that's why you see him babooning around. There is your pawn, the promotion square and the impediments along the road.
Since every move in chess is answered by a countermove there are only two ways to force an advantage.
By means of space. The more space the attacker has and the less space the defender has the greater the chance that the defender cannot keep up with the attacker.
By means of time. When you threaten 2 targets with one move there isn't always one move that parries both threats of the same time. The principle of two weaknesses is based on this.
So basically you conduct feigned attacks inducing weaknessess or mistakes.
Piece activity is paramount in both the middlegame and the endgame.
Strategy is the decision making that steers your course through this mental maze, based on the analysis of the positions.