after just 2 questions i'm disappointed.My initial fide rating is 2017.i've started with the 1st question in a waiting room, and i found the correct answer immediately (but didn't check if it was the right one). It was a strategic question. Then i go home, i put the position on the board, and after a long analysis i found that another answer, a tactical one, was strategically wrong but it wins too. The author think that this winning move is the worse of them all, becouse it's strategically wrong. This is really questionable.In the second question i have another surprise. The first choice of the author is ok, but the second (tied) loose some advantage, and it looks weaker than 4th choice.I know that it's not easy to put in order 5 choice in a won position, but i was expecting something more from the book, since there are just 50 questions.