Varying the price by number of guests

Hi all,

we're new to booking.com a couple of months ago and still tweaking our pricing and policies etc.

we have a self catering 4 bedroom house and book out the property to single groups only, from 2 people to 8 people. Currently we've used the 'pricing by number of guests' option to reduce the cost for groups less than 8. Thus has worked great but my question is: is it possible to vary the discount rate or the minimum number of guests for different times of year?

we have set a sliding scale price from 8 guests down to 4 guests, but there are times where we'd like to extend those discounts down to 2 guests, and other times we'd like to change the rate of discount. As far as I can see, thus doesn't seem possible.

Can this be done??

Thanks!