  We construct symmetric self-similar Dirichlet forms on unconstrained
Sierpinski carpets, which are natural extension of planner Sierpinski carpets
by allowing the small cells to live off the $1/k$ grids. The intersection of
two cells can be a line segment of irrational length, and we also drop the
non-diagonal assumption in this recurrent setting. The proof of the existence
is purely analytic. A uniqueness theorem is also provided. Moreover, the
additional freedom of unconstrained Sierpinski carpets allows us to slide the
cells around. In this situation, we view unconstrained Sierpinski carpets as
moving fractals, and we prove that the self-similar Dirichlet forms will vary
continuously in a $\Gamma$-convergence sense.
