Another strategy I've seen was to again, destroy all but one asteroid, and then accelerate full speed vertically, and wait for saucers and pick them off, while

Another strategy I've seen was to again, destroy all but one asteroid, and then accelerate full speed vertically, and wait for saucers and pick them off, while being a fast moving target the saucers were not great at hitting. Unfortunately, after this strategy became popular, Atari released updated ROMs, with much better targeting from the small saucers, and the strategy stopped working. I suspect this also invalidated the corner strategy.