I almost passed this one up but I'm sure glad I didn't. As a player rated in the 1600 - 1800 range, I'm often frustrated to see a "crushing" win swept away in one careless move. I get so wrapped up in my own plans that I often ignore those of my opponent. Ugh! Although it is easy to say "always try to understand what your opponent's move was threatening before making your move", I tend to play fast and impatiently (even when not in any time trouble). Heisman's book is great because it forces you to solve the problems in 2 stages - identify the threat, then figure out the remedy.

By working on these, I found that I started to automatically look more carefully at my opponent's moves. Heisman's examples also include some very common themes so I suspect "imprinting" these "tactical images" into my brain will also do me good. Great stuff!

By the way, as an earlier reviewer pointed out, I found that even some of the so-called easy challenges were sometimes difficult.