I have seen the strategy of retreating to a safe room when an intruder is present and waiting for him to breach this room before considering using my weapon. This made sense to me in this no castle doctrine state of MN. The older I get the more I worry about what lawyers and over zealous DA's would do to a resident here if they left their bedroom/safe room and sought out the intruder, so the locked door policy seemed right. The problem for me is all our bedrooms are on the second floor. The only staircase exits and faces my bedroom door and that would be fine if I could guaranty the BG would come towards my door but if the BG decides to do a u-turn off the stairs, he would have access to my son's room. So is the best strategy to leave the door open and remain behind cover and await the intruder to come up the stairs and then announce I am armed as you see him on the stairs? Not allow him to advance off the staircase? One thing that works well is our outside lights (especially the porch lights in this case) shine through the front door and windows at the base of the stairs illuminating the stair case. I would be in total darkness but the staircase would be lighted. Amazing (but good) the questions my brain is asking me since joining/reading this great forum!