Wesley Saunders finished with 20 points, seven rebounds, six assists and three steals for the Crimson (10-6, 2-0 Ivy League), who have won three of their last four games. Jonah Travis had 16 points and Christian Webster added 13.
Harvard trailed 57-44 after Dartmouth’s Malik Gill made two free throws. But the Crimson rallied and forced overtime after Chambers scored on a layup, tying the game at 62-62 with 5 seconds left in regulation.
Harvard scored the first six points in overtime and did not relinquish its advantage the rest of the way. Chambers had five points in OT.
Gill and John Golden each scored 15 points for the Big Green (4-12, 0-2). Conner Boehm recorded a double-double with 14 points and 11 rebounds.