If we play with 6 investigators and 3 expansion boards (DH, IH, KH), how many monsters spawn from an opening gate during mythos phase? one or two?

One monster spawns.

For the gate/monsters/outskirts limits and number of monsters spawning, the number of investigators functions as four in your case: 6–2=4. The 2 is that you're using two expansion boards beyond the limit of one expansion board .

Or, more easily:

N-B+1

where:

N = number of investigators

B = number of boards in play

But that doesn't work when you're using zero (expansion) boards.

One monster spawns.

For the gate/monsters/outskirts limits and number of monsters spawning, the number of investigators functions as four in your case: 6–2=4. The 2 is that you're using two expansion boards beyond the limit of one expansion board .

Thank you very much for the clarification

But that doesn't work when you're using zero (expansion) boards.

True, but I never considered an option asking for how expansion boards impact the game when you have zero expansion boards in play. Let's go recursive then:

if B=0, then N*=N

if B>0, then N*=N-B+1

B, N integers

better?

But that doesn't work when you're using zero (expansion) boards.

True, but I never considered an option asking for how expansion boards impact the game when you have zero expansion boards in play. Let's go recursive then:

if B=0, then N*=N

if B>0, then N*=N-B+1

B, N integers

better?

Well, this escalated quickly

Thank you, by the way

"B, N integers"

lol

If M = money and D = Alex's Desire to purchase FFG games,

Then, D x M = S ........ where S = Skint