A data point: the chess and draughts collection of the Royal Dutch Library in The Hague has about 30.000 titles: http://www.kb.nl/vak/schaak/inleiding/geschiedenis-en.html
Are those all non-repeat book CHESS titles only or are some short publications like magizines, articles and take out books on checker & draughts ...geez.
They are non-repeat chess titles (and a much smaller number of draughts titles), started from private collections from the end of the 19th / early 20th century and increased since then. You can't take them out, but if you make an appointment you can go there and read them.
A data point: the chess and draughts collection of the Royal Dutch Library in The Hague has about 30.000 titles: http://www.kb.nl/vak/schaak/inleiding/geschiedenis-en.html
Are those all non-repeat book CHESS titles only or are some short publications like magizines, articles and take out books on checker & draughts ...geez.