It is impossible to find all positions, since there are too many exceptions. For instance there are 209 different positions of mutual zugzwang alone. But the amount of themes they can be classified by seems to be fairly limited. Sofar I have found the following themes:
- Rook pawns need a totally different approach.
- Sometimes there is a mate at the edge of the board. Both the attacker and the defender can fall victim.
- Beware of skewers and pins. King against rook, king against pawn, rook against pawn.
- The king of the attacker always needs a refuge. Behind his pawn, behind his rook, behind the defender's king, near the defender's rook.
- Be aware of checks from the long side. From all four directions.
- Prevent the defenders king and rook working together against the pawn. Cut off the king if you can. Horizontally or vertically.
- Tactical trick: chase away the defenders king from his defense of his rook.
- Beware of rook trades by the defender that leaves you with a drawn pawn ending (where you don't have the opposition).
- Beware of an overloaded king, who has to defend both the rook and the pawn. In that case the defender can take the pawn.