by mpjh on Sat Apr 11, 2009 9:38 pm
OK when you have three of one color or one of each, you have a set that you can cash in. When you have 5 cards, you always have a set and must cash in the next turn. If you are not ready to cash in, you still must. To avoid this you can not take any territories and thus not earn another card, keeping your total at 4. If you have a set in the 4, then you can control when to cash it.
That is why I had recommended No attack.