-/// Position c'tors. Here we always create a slower but safer copy of
-/// the original position or the FEN string, we want the new born Position
-/// object do not depend on any external data. Instead if we know what we
-/// are doing and we need speed we can create a position with default
-/// c'tor Position() and then use just fast_copy().
+/// Position c'tors. Here we always create a copy of the original position
+/// or the FEN string, we want the new born Position object do not depend
+/// on any external data so we detach state pointer from the source one.