Just now I finished a game against COSUMI in which I took 2 stones of handicap. I thought I lost my a big margin, but it turns out taht I won by 7 points. Last time I played against this program on 2 stones, I won by 38 points. (For comparison, this game is included here.) So I am sure that this time around I made my fair share of mistakes. Much obliged in advance for your comments.