Endgame incompetence!

 When the board is thick with pieces, I usually know what to do; it is simple for me. But as the armies are decimated, I become confused and lost. This pattern has occured in many of my past games, but my performance in the Chicago Open was truly a tour de force of poor endgame technique. In three games, I had a huge advantage in a position with two pieces (excluding kings, pawns) per side. In each, I gradually squandered it away to nothing (while I still made a small rating increase somehow). For the last one I have the excuse of time trouble but I don't for the other two!