Instruct: Classify the given review as either positive or negative.
Query: A MUST read for all chess players up to an "A" rating

I am a strong "B" / weak "A" rated player. I've always known that my chess has been tactically very strong, yet positionally average. This book has changed my outlook on the way a chess game is played. The author starts off by explaining his "thinking technique" (which is worth the price of the book alone!), and then moves on to explain the various imbalances that occur within a game. What really impressed me about the book, was the clear lay-out, excellent english, and error-free chess notation. (I cannot stand chess books written in the passive voice - or even worse, with errors all over the book!).Mr Silman's choice of examples were always pertinent, and clear. He provides several tests, at the end of each section of the book. I found the tests at just the right level...challenging, and not trivial, nor ridiculously obtuse.I recommend this book VERY STRONGLY. This is THE best book for players of moderate strength.