From the Readme:
Caro is an old games that my friends and I used to play in high school.
It was played on a large grid paper could be any size but not less than 10×10.
I remember this wasn't my favorite game because I always lost for my friends.
However, with the help of a wonderful test team, and lots of help from school
plus help of the powerful Visual Basic 3.0 allow me to design and program
Caro to be a very smart player.