Error in Cecil Purdy's Analysis III

'Purdy writes, "If 22 Re3, Kh8 followed by ...Rg8, etc." The infamous 'etc...'
which used to be potential fishing grounds for research and exploration.

These days 'etc...' has been replaced by something like ⩲ or ∓ or a number
and unless it was done by an acient computer set on a low horizon then
there is not much chance of finding a tactical smash like 24. Qxh7+

Some lad thinks he should avoid the Purdy book. I think it's all the more
reason to pick one up if you see it going at a reasonable price. Not only will
you get dozens of Purdy gems (see below for just a few) which have entered
chess lore. These pre computer books are excellent work books to stop you
from sitting there and 'reading and nodding' as Nigel Davies puts it. You will
have to put some work in which will be benefical and increase your enjoyment.

Just a few Purdy quotes.

'Pawn endings are to chess what putting is to golf.'

'If the student forces himself to examine all the moves that smite, however
absurd they look at first glance, he is on his way to becoming a master of tactics.'

(from which I coined my war cry: 'Check all Checks!)

'Chess players may be divided into three classes: those who don’t know the
principles, and are therefore very weak; those who know the principles and
are less weak; and those who know how weak the principles are, and are strong.'