Re: I\'m stumped..
I like to start digging as close to the stump as I can get. If I hit a root too thick, I move the bucket over half the width of the bucket and try to cut through again. I do this on either side until I get through and start digging down.
Once I get the holes started I keep trying to get close to the stump again.
I've gone 12 feet deep on all four side before I could get the really nasty ones to break free!
Of course, getting the stump out of the hole is even more difficult! You might have to dig a ramp to pull it out with a chain, but if your just going to grow grass over it, just knock it over and bury it.
Never bury a stump in and area you might, even remotely, plan to build on. 10 to 20 years from now you might have a low spot where you bury a stump, but chances are you wont even know it.
Good Luck,
Eddie