SMA* Search-Artificial intelligence
IDA* search is good from a memory point of view. actually it may  be criticised for not using enough memory - utilizing  more memory may increase the efficiency, so actually  our  search  strategies  should  use  all  the  available  memory.  Simplified Memory-Bounded A* search (SMA*) is a search which does only that. This is a complex search strategy, with details given in Norvig and Russell.