I have found myself with a problem, due to housing issues I have 3 months where all I have is a bench (with leg extension addon), dumbells, a barbell, and plates.

My problem is I am not sure what I should do to at least maintain my leg muscle (or build on legs). I can't squat without a rack, and I squat too heavy to clean the weight (and don't want to clean the weight as I work out alone and can't dump the weight due to wooden floor).

I can deadlift at least, but just worried about quads. I tried barbell hack squats but I find the bar just hits my calves and hamstrings which stops the movement.

One more problem - I do rows but is there are suitable replacement for chinups as there is no equipment or anything around the house for that either

Any suggestions?