With narratives it is easier to divide the position in different parts. In this old post I had trouble with bookkeeping of all the possible trades in the diagram. What I used to do was something like:
- White to move Nxe8
- Add 5 points to white
- Add 9 points to black
- White can do several things now, take the bishop, add 3 points or play Nc7 attacking the rook 5 points or he can play Bg5 attacking the queen 9 points.
- Eh, where was I?
Black: Nxc2 (9 points) Nxa1 (5 points) and Bxc3 (3 points) together 17 points.
White: Nxe8 (5 points) Nxg7 (3 points) together 8 points
Or after playing Bg5 first.
White: Bxe7 (9 points) Nxe8 (5 points) together 14 points
This is a much simpler way to look at counting problems than switching from side to side every move, in the mean time adding up points and devising new moves.
I'm convinced that the chessmasters live in a much simpler world than I because I'm confusing myself all the time. Narratives help to dissect the possition in its constituent parts and to get a definite conclusion about each part. Thus diminishing the load of the short term memory.
For your convenience I repeated the diagram below.
White to move, black to win.