H. G. Muller wrote on Thu, Sep 1, 2016 03:31 PM EDT:
Rule of thumb is that captures are about twice as valuable as non-captures. Pieces with 12 non-divergent target squares (i.e both capture andnon-capture) are approximately worth a Rook. Soone would expect that adding 4 non-captures to a Knight increases the value by about 1/3 of the Knight-Rook difference. That brings you indeed very close to 3.8 (N=3.2, R= 5).
Rule of thumb is that captures are about twice as valuable as non-captures. Pieces with 12 non-divergent target squares (i.e both capture andnon-capture) are approximately worth a Rook. Soone would expect that adding 4 non-captures to a Knight increases the value by about 1/3 of the Knight-Rook difference. That brings you indeed very close to 3.8 (N=3.2, R= 5).