This site has promise, but I think the training section needs to become smarter. I worked through about 20 problems. None of them were challenging for me, but that&#x27;s because I&#x27;m not in the target market (I&#x27;m about the same strength as the site&#x27;s creator).  However, what concerned me was that they didn&#x27;t become more challenging at all.  The difficulty seemed to randomly vary from one problem to the next.  Given the capabilities available to an online system, the training exercises should quickly adapt to the level of the student.<p>Personally, while growing up, I spent many, many hours with a book of tactics by Maxim Blokh that had a numeric value assigned to each problem, corresponding to its difficulty.  Telling the student the difficulty level is less than ideal (and can be avoided online), but the ability to focus on problems just outside of my &quot;comfort zone&quot; was an invaluable training tool.