I have analyzed the board and found a winning move. Currently, I have O pieces at (row3, col2), (row4, col3), and (row5, col4), which form a diagonal with a missing piece at (row2, col1). By dropping an O in column 1, it lands at row2 (since row5: X, row4: O, row3: X are taken), completing the diagonal sequence [(row2, col1), (row3, col2), (row4, col3), (row5, col4)] for a Connect Four win. Therefore, I will play column 1.