There are many opportunities for an overnight stay in Maastricht.
Deal with Golden Tulip Apple Park Maastricht.
Golden Tulip Apple Park Maastricht offers a special Limburg Open discount deal for the participants of the tournament. The hotel is at 5 minutes walking distance from the playing venue.
The Limburg Open Package (3 nights)
Single room € 260,-; Double room € 325,-
Next to this there are each year a lot of chess players who stay on camping mooi Bemelen: http://www.mooibemelen.nl.
Finally we can refer to the website of the tourist office: http://www.vvv-maastricht.eu/home.html.