How exactly does a XOR Linked list work?

Question

The following link explains it.
The implementation is said to work by storing the XOR of the previous and next address(say nxp), instead of storing both(previous and

Answer 1

Double linked list needs 2*N pointers stored for N nodes, plus at least one additional pointer(head, or perhaps head and tail).

XOR linked list needs N pointers stored for N nodes, plus at least two additional pointers (head and last visited node, or perhaps head and tail and last visited node). While traversing, you store one node (the last visited node), but when you go to the next node, you rewrite that with the now-previous node's address.