🚀 go-pugleaf

Today I installed gnuchess4.0pl60 on a DECstation 5000. The program was
obviously not making use of an opening book file, even though I had
gnuchess.book.data where I specified in the Makefile. So I renamed
gnuchess.book.data and started up the program, whereupon it proceded to
create a binary bookfile from the text file gnuchess.book. Now I had a 
working opening book.

But this new gnuchess.book.data was a whopping 3Mb, where the original
gnuchess.book.data which came with the distribution was a modest 300K or
so. Poking around, I gather from gnuchess.h

  #define BOOKSIZE 250000

That this file can hold 250000 positions. However, `wc -l gnuchess.book`
comes up with 3771 implying a need for less than 8000 positions, or so I
would think. Is this huge number of positions to allow for future expansion?
Does anyone intend to supply an opening book anywhere near this size? -I'm
certainly not adding this much by hand. More importantly, will I suffer
any problems, obvious or subtle, if I reduce BOOKSIZE to something closer
to the MSDOS value?