One of the (many) nice features of Go is that you don't
need an opponent of equal strength/experience to have an
exciting game. The Go game allows you to equalize the
players' chances to win by adding some initial stones on
the board. The larger the strength difference the more
stones you would add.
These stones are called handicap stones. The handicap
stones are usually placed on predestined points,
indicated on the Go board by a thick spot.
We show two examples: a handicap 3 and a handicap 9
game. The latter is usually considered the maximum for
19x19 Go and (as you can see from the figure) is far
more than reasonable for 7x7.