I would like to suggest an improvement to Lichess advanced search, Lichess Tutor, and game history: more support for material balance, pawn structure, castling configuration, and recurring positional themes.
At the moment, many parts of the site are very opening-focused. This is useful, of course, but it would also be very helpful to have similar tools for studying middlegames and endgames.
For example, in advanced search, I would like to be able to filter my own games by positions such as:
* rook endgames;
* rook and pawn vs rook and pawn endgames;
* minor-piece endgames;
* opposite-colored bishop endgames;
* queenless middlegames;
* positions with specific material remaining;
* positions with isolated, doubled, backward, passed, or connected passed pawns;
* isolated queen’s pawn positions;
* hanging pawn positions;
* locked-center or open-center positions;
* same-side castling positions;
* opposite-side castling positions.
This would make it much easier to study recurring patterns from my own games. For example, I could quickly find all my rook endgames, all my IQP games, or all my opposite-side castling games, instead of manually reviewing many games.
I think this could also be useful in Lichess Tutor. Tutor could identify patterns such as:
* “You perform well in rook endgames.”
* “You struggle in isolated queen’s pawn positions.”
* “Your accuracy drops in opposite-side castling positions.”
* “You score poorly in queenless middlegames.”
* “You often mishandle passed-pawn endgames.”
Another possible improvement would be to add automatic tags to games in the player’s game history, similar to puzzle themes. For example, a game could have tags such as “rook endgame,” “IQP,” “opposite-side castling,” “passed pawn,” “minor-piece endgame,” or “queenless middlegame.” These tags could then be used for filtering, review, and training.
Even a basic first version with material-based filters, such as “both sides have rooks and no queens or minor pieces,” would already be very useful. More detailed pawn-structure and positional-theme classification could be added later.