Playing in column 2 would be a mistake as it would create a sequence of 3 Os horizontally, but I need to reconsider. If I place at (4,2), my opponent could play at (3,2) and potentially create a winning opportunity. Looking more closely, column 4 (position 5,4) is better as it extends my horizontal sequence while not creating an immediate advantage for my opponent. This creates a horizontal threat with my pieces at (5,2) and (5,3), forcing my opponent to defend while I build other attacking opportunities.