I need to play at position 2,0 (bottom-left corner) for two key reasons:

1. Defensive: My opponent has X's at the center (1,1) and bottom-right (2,2). If they get position 0,2 (top-right), they'll complete a diagonal. Playing at 2,0 blocks their potential diagonal threat.

2. Offensive: By placing my O at 2,0, I create two potential winning paths for myself:
   - A vertical line opportunity with my existing O at 0,0 (I would need 1,0 next)
   - A potential diagonal winning path (2,0 - 1,1 - 0,2)

This move both prevents my opponent from creating an immediate threat and sets up multiple winning possibilities for me.