Here are the articles mentioned earlier. They are in .pdf format, so you can download them for future reference. From www.chesscafe.com;
take a look at the original two-part “400 Points” article. You can find it
at: www.chesscafe.com/text/skittles148.pdf and
www.chesscafe.com/text/skittles150.pdf. This will give you an
excellent idea what to expect.
thanks for your suggestion. I'm bowled over by the way people have kindly taken the time to answer my question - a big thank you to you all!
Pretty typical for chess players I think. We like to talk about and share our game. If we can help someone at the same time, that's just more gravy, and everyone is having fun.