The way to get to 1650. Once you all have 9 provinces open.
1st round do provinces 1-9 only.
2nd round do provinces 1-8 only.
3rd round do provinces 1-7 only.
4th round do provinces 1-6 only.
5th round do provinces 1-5 only.
6th round do provinces 1-4 only.
Skip the 6th round and you still get 1400 points.