Every item has more aspects. You can improve the mobility of a piece of your own. + Or you can limit the mobility of a piece of your opponent. -/- Or you dispute it ( the rooks against each other at the same open file) =
Will these exercises help me with my main problem? For convenience I copy an example of my problem:
Black to move. Inspired by the analysis of Loomis I found 12. ... b5 to be a good move here. For instance 12. ... b5 13. cxb5 axb5 14. Ncxb5 c6 15. Nc3 La6 (threatening the rook at f1) followed by Qa5 and black has no problems whatsoever. The distance between the exercises of PCT (improve piece mobility) and finding the move b5 isn't as big as it might look. On the other hand it is clear that additional study/training is needed to find a move as b5 fast.