Shion no Ou, 3-gatsu no Lion Recommendations
Both anime focuses on Shougi
Both MC has a dark path that's related to Shougi
Both MC are "fostered" and loved by their fostered family.
theyre not only about the same game but have a similar developement of relationships. the main chars are closed off for one reason or another and with the push of people in their surrounding they get more confident. they are still vastly diffrent and both very interesting.