A 2300 tournament player doesn't form plans like that At least not without looking at a position.
Players who have studied the game try to meet the needs of the position. If the position lets them have a good attack, then they'll invest moves towards that. If the position lets them play for a win by being defensive or maneuvering or etc, then they'll try to do that.
The only option you give that I want to comment on without referencing a position is that in general being defensive minded is bad... at least it's bad the way most low rated players think of defense. Other than having a king that's safe from checkmate, the most important thing in chess is piece activity. Piece activity is some combination of mobility (influencing many empty squares) and being in contact with important offense/defense points (often weak pawns or squares around a king).
A strong strategic and defensive player (let's say like Petrosian) will defend in a way that his pieces are still active. Only weak players will tie many of their pieces to the defense of something when those pieces have little mobility and no other function than defense.
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But that doesn't answer your question. Your main question is how to generate winning chances in an equal position. Mostly what I try to avoid is a symmetrical pawn structure. As long as there is a fundamental difference like structure, then the position will give me and my opponent a different set of strengths and weaknesses, and then I just need to lean on my strengths to play for a win.
Some positions remain equal for a long time, and you don't really get a chance to play for a win until the endgame. Most players who are studied and experienced don't mind waiting until move 60 to start beating you. As long as they win they don't care if they beat you on move 20 or 100. So patience and knowing some endgame strategy are very important for the scenario you're asking about IMO.
I was a little bored and felt like giving some random context to explain an issue I had while playing chess.
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You're playing a tough opponent, both of your openings are book; the position is equal. Your opponent seems to constantly find all the tactics and prevent them from happening. It's middle game, you're about 15 moves in. The game feels like it could go anywhere. Most of the pieces are still on the board. Maybe 1-2 pawns have been traded off. You're in a tournament. There is a special rule. You have to play for a win if you want to continue. Let's say you're both around 2300 rating. So, it's not as simple as waiting for a mistake.
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How do you feel about the following statements ?
A) Going for prophylactic moves to limit your opponent in hope of a zugzwang.
(your opponent will eventually do a mistake if all the moves left are a mistake)
B) Attempt to complicate the position while keeping pieces on the board at all cost.
(keep trying to find tactics with pins/danger levels/threats and hope for the best)
C) Play positional quiet moves that feel resourceful on long term.
(regroup your pieces and prepare to push pawns)
D) Stockpile all your pieces to attack a specific position.
(Focus all your attention on trading everything off to win by 1 pawn hopefully)
E) Consider sacrificing material for piece activity even if winning is unclear.
(Preferably A or H pawn first and maybe a minor piece if it can break the king's pawn wall)
F) Focus on a very strong defensive game where the goal is to mess up your opponent's plan.
(They might be more likely to make a mistake while trying to calculate a win against you)
G) Something else (?)
The goal of this topic is to establish what people tend to prefer to do in equal positions in order to stay in a game. I don't have a board or any example. This is mostly psychological, but some options might be better than others in general.
I've been struggling a lot about finding options that may create opportunities to win consistently against much stronger opponents. I've been feeling like I am not aware of how to priorize decisions when it comes to very equal positions. I've been curious if someone found the light at the end of the tunnel. If there's a checklist of some sort of what to look at and consider while playing each move.