H. G. Muller wrote on Mon, Sep 29, 2008 07:54 AM UTC:
The Mastodon is indeed a strong piece. On 8x8 I find for its end-game (i.e.
only othe pieces present King and Pawn) value ~750, when R=500 and Q=975 (R
and Q are the closest orthodox pieces I compare it with).
In a Superchess context (with standard opening array CNBQKACeR, where Ce =
Centaur = KN), as Q replacement, I find the Mastodon opening value to be
only 150 below Queen, but due to the large number of superpieces on such a
small board, all light pieces gain strongly in opening value: N=350, R=575
when Q=950 (and thus Mastodon = 800).