You can find a lot of good dots and boxes strategy on
the following page.
http://cf.geocities.com/ilanpi/mathter.html
Note that game described is for the 5 dot by 5 dot game
on Yahoo (too small IMO). For 6 x 6 at littlegolem, the
parity of the number of long chains you want is the
opposite as the 5 x 5 game.
The long chain rule: Let X be the total number of dots
plus the number of long chains. The first player wants
to make X even while the second player wants to make X odd.
So for 6 x 6, the first player wants to make an even
number of long chains while the second player wants an
odd number.
