Richmond (12-6, 2-1 Atlantic 10 Conference) scored its final 13 points on free throws, beginning on a three-point play by Lindsay that gave the Spiders a 61-60 lead with 5:13 to play.
Richmond shot just 36.5 percent from the field but went 32 of 35 from the free throw line. Anthony hit 11 of 12 from the line and Lindsay made 11 of 13.
Dyshawn Pierre made 8 of 12 field goals and scored 19 for Dayton (13-5, 1-2), which shot 51.1 percent from the field.
The Spiders trailed nearly the entire first half but ultimately pulled away late after a second half that featured seven lead changes.
Richmond took good care of the ball, committing only six turnovers.
High school junior Zach Brown, a 7-footer from Miami, has rescinded his commitment to UConn, sources told ESPN.
Reserve center Akolda Manyang has been charged with felony aggravated assault after being accused of punching a man in the face without provocation.
Should the 76ers take Ben Simmons No. 1? What if they get the Lakers' pick, too? And how does the rest of the top 10 shake out? Our Insiders run their latest mock draft, with Philly on the clock.