Single Comment

> while Chu Shogi makes it difficult to complete the Lion exchange by
capturing the Lion back. 

Actually this is not true: the rule is the same. Also in Chu Shogi it is
not allowed to capture a protected Lion (and also there protection with
a pinned piece counts, as moving in check is not illegal in Chu Shogi). Chu Shogi
has the extra rule, however, that you are not allowed to capture a Lion
when on the previous move your Lion was captured by a non-Lion. This
forbids indirect exchange. However, the Japanese Chu-Shogi association has
adopted the 'Okazaki rule', which says that you can counter-strike agains
an unprotected Lion.

In the description of Matron Chess it is not entirely clear what 'visibly
protected' means. In Chu Shogi a Lion counts as protected when it can be
recaptured by a slider that before was blocked by the attacking Lion (X-ray
protector). I wonder if that is the same here. If so, a compact formulation
would be that a Matron that captures another Matron becomes absolutely
royal for one move, i.e. even pseudo-legal attacks are enough to forbid
it.

To not be completely stuck with a super-piece to the very end of the game
(making the game drawish), I invented the rule in Mighty-Lion Chess that
protection by a King doesn't count. So with nothing left but a King to
protect the super piece, trading would be less difficult again.