Tactics for the Swamp (Fortress).

The editor finally launched, albeit with some difficulty, but it's not as bad as I thought.

I could have just asked for a save file. :)

CEIL(N/10) (ceiling function)

Something is missing. Or maybe it's supposed to round up?

Judging by the numbers (ideally, there should be more), the probabilities of invalid sums are added to the probability of the largest valid number.

I think all invalid values simply go to the upper limit. That is, if there is a limit of 3 for 21 cows, then when the probability reaches 4, only 3 will die, as it should. Perhaps it needs to be calculated differently. A(3) = 1 - A(0) - A(1) - A(2)

When splitting brings a profit of at least 10%:

You can split it into more than just 2 stacks.

This will happen once in a lifetime...

Maybe. It happens constantly in poker :D

And can you provide more details, a specific implementation? So far, I see: every tenth one - guaranteed death, the remainder - as it happens (but then there is no spread like with the others).

Well, 20%, like the Unicorns' Blindness, for example. And the number of deaths depends on the quantity. It's simple.