dynQBF is an expansion-based QBF solver for instances in prenex CNF form. First, the CNF matix is split into subproblems by constructing a tree decomposition. The QBF is then solved by dynamic programming over the tree decomposition. While the structure of the CNF is reflected by the tree decomposition, structure within the prefix is considered by integrating dependency schemes in the solving process. Furthermore, dynQBF uses nested sets of binary decision diagrams (BDDs) to efficiently store intermediate results.