Our observations show that the effect of using a truly integrated math and chess workbook also provides mental entertainment and thought by pupils as more fun than traditional computation practices. Pupils were able to sit longer when working on math and chess integrated workbook than working on traditional computation worksheets.
Read more here. Now if you're wondering exactly how all this works, check out some examples on this page. I just don't know, seeing all those figurines and numbers to solve maths problems seems a bit weird. It doesn't quite work for me.