Michpunk, I don't quite follow you. Bars, if entered, would display rotational symmetry, not the answers. I don't see any difference between the way the answer is notionally entered in column 13, and, for example, column 7, though the starting point of the latter is more clearly fixed. You could start the answer in column 13 lower down, leaving a blank cell above it (and maybe that's what the solver is supposed to do in the light of the endgame) but the barring is still symmetrical.