This is a cursed win. Mate can be forced, but a draw can be achieved under the fifty-move rule.
To probe all KQBNNvKQ positions, these tables and their transitive dependencies are also required:
KBNNvKQ · KQBNNvK · KQNNvKQ · KQBNvKQ
KQBNNvKQ.txt KQBNNvKQ.dot