Watching Alyssa and Vivian play chess can be a quite entertaining experience. Given the choice of
(1) take one of Alyssa's pieces, and
(2) group her own pieces together,
Vivian would go for option (2) most of the time. The reason? "Because they are friends."
Surprisingly, this seems to be an effective way for preserving most of her pieces to the end and sometimes even helps to secure a win.