To block Claude's potential three-in-a-row and create a possibility for a future win, I'll place my piece in column 3, but since that's not an option due to the column being full, the next best move is to choose a column that could potentially create a line of 4 pieces for me or block Claude from doing the same. Given the available columns, placing my piece in column 2 could set me up for a potential future win and doesn't immediately give Claude an advantage.