The Bulldogs spoiled Senior Night at Leede Arena, surviving 27 points by Evan Boudreaux as the Big Green scored a season-high 86 points.
Brown jumped out to a 20-point lead in the first half then held off the Big Green, which got as close as three points late in the game before succumbing, 80-75.
Dartmouth is just one game out of fourth place but needs two wins this weekend to give itself a solid chance at qualifying for the inaugural Ivy League Tournament.
Evan Boudreaux notched his 12th double-double of the season — the most by a Big Green player in at least 50 years — to help keep Dartmouth in the race for a spot in the Ivy League Tournament.
Taylor Johnson drove the length of the floor and dropped in a layup with one second left in overtime to give the Big Green a thrilling 80-79 victory over Columbia.
Evan Boudreaux matched his career high with 27 points, but Cornell outlasted the Big Green at Leede Arena on Friday night, 69-65.
Dartmouth hosts Cornell and Columbia this weekend with an opportunity to move up into a tie for fourth with the Lions.
This week's athletes had what it takes to clinch victories for their teams.
Mike Fleming hit a three-pointer to break a 74-all tie in the final minute at Brown as he scored a career-high 17 points as the Big Green defeated the Bears, 77-74.
The Big Green hit nearly half of their shots, but Yale shot 57.4 percent from the floor to fend off visiting Dartmouth by nine points.
In a streaky season, Dartmouth will attempt to build upon its most recent win with this trip to Yale and Brown on Friday and Saturday, respectively.
Big Green athletes are continuing to have success heating up the New England winter.