Weekly Go Problem No. 3

GO Problem for Beginners No. 3

After a series of exchanges, White’s last move was at K16.

At this stage, the game has entered the endgame, and White appears to be comfortably ahead. However, as shown in the second diagram, White mistakenly plays E19, a move that ultimately leads to defeat.

Instead, White could have played a different move and still secured the win. Can you find the move White should have played to avoid being captured and preserve the lead?