The rules are not clear, and in a similar fashion to mathematichess: you assume too much of the reader to understand what you mean instead of what you write.
As in mathematichess, it would probably help to group the rules into logical clusters, instead of the more-narrative style that's here now.
On to specifics:
(Not a rule question) Fisher Random was "unsuccessful" at randomizing chess?? Arimaa is random!?
Using "Black Swan" as both piece and event is just asking for confusion; the thematic gain is not worth it IMO.
When multiple pieces are revealed, the owner gets to choose their placement?
Do swans flip/reveal immediately after any move, or do you get to choose??
If the latter, do you have to on the 8th rank?
If the latter, with multiple pieces revealing on 7th/8th rank, can you place a pawn on 8th? If so, does it promote immediately?
Since Black Swans are flipped over one by one, there is not the risk that the board might be jammed, considering that the occurence of Black Swans (events) is only 4 out of 20.
It might be extraordinarily unlikely, but I think it is possible. Might as well say what to do.
The rules are not clear, and in a similar fashion to mathematichess: you assume too much of the reader to understand what you mean instead of what you write.
As in mathematichess, it would probably help to group the rules into logical clusters, instead of the more-narrative style that's here now.
On to specifics:
It might be extraordinarily unlikely, but I think it is possible. Might as well say what to do.