N = 3.05 P, B = 3.25 P, R = 5.63 P, Q = 9.5 P
See table 6
https://arxiv.org/pdf/2009.04374.pdf
KR vs. K checkmates, KBB vs. K checkmate easily, KBN vs. K checkmates with difficulty, KNN cannot checkmate K, KNN vs. KP can checkmate with great difficulty and not always.
A knight controls 2 to 8 squares, a bishop 7 to 13, a rook always 14, a queen 21 to 27
-Luka Caraway