Peter Aronson wrote on Fri, Jul 20, 2007 05:53 PM UTC:
According to Betza (at least at one time -- his values have varied), a
Crowned Knight (Knight + Mann) is worth two Knights (the same as a
Cardinal) on an 8x8 board. Because it is a short range piece, it might be
worth less on a larger board. On the other hand, it is very powerful in
the endgame.