Dominque's three-point play with 1:27 left put the Peacocks (5-7) up 61-60. Gaskins followed with a basket and Washington hit all four of his free throws sandwiched around Trevis Wyche going 2 of 4 in the game-winning surge.
The Knights (4-6), whose last point came with 3:02 left, missed their last five shots, plus three free throws, and had three turnovers.
Anderson scored nine of the Knights' final 11 points to close the half on a 10-3 run for a 36-27 lead.
Gaskins had nine points as the Peacocks opened the second half with a 20-5 run to go up 47-41. But the Knights settled down until the closing minutes.