Instruct: Classify Amazon reviews into positive or negative sentiment
Query: This is the best puzzle book for improvement for players rated 1700-2000

Highly recommended, the best book for tactical improvement. So why do I only give it 4 stars? The reason for this is that some diagrams/puzzles are repeated in this book. For instance, puzzle 53 is the same as 113, 59 the same as 114. Not good, but I think not only Emms is to be blamed for this, but the whole staff at Gambitbooks. But this shouldn't keep you from buying the book; this is an excellent chess puzzle book for tactical training. My advice about books on tactical improvement depending on the rating:900-1100 : Chess Tactics for Student1300-1600: Winning Chess Exercises for Kids1700-2000: The Ultimate Chess Puzzle Book2000-> : John Nunn's Chess Puzzle Book.