oh its just 42..
just in case you missed it!-- the previous page has my alternate solution with 47 mates. Makes me wonder if there are any more...
We're waiting for you to add the one more and break the record. :)
This digram achieves ten mates without using either of the rooks, the queen, one of the bishops or a knight. I will try to improve on this. However, it is hard to get discoveries with pawns on c6 and g6.
You also have a promoted bishop there which is not allowed.
Good point! I didn't notice that.