The problem with the pool table: Solución
By raising the issue of the pool table, that is to hit one of the two balls that are on the table (A for example) , so that it impacts the other (la B) previously given in one of the bands (edges) Table, flipping the closed problem to a simple bounce case.
We can generalize the problem considering that you can give, before impact with the second ball, a given number of impacts with the bands (lateral edges) Table.