Is it possible to draw polygons in imagemagick?

I'm trying to draw a polygon with given vertices; however, Image
Magick adds an extra stroke of width 1 about the polygon, so, in
effect, the vertices are moved outside...  Is it possible to do this
now?

If not, then I think such a way must be added.  Something like an
"extra-magic" -strokewidth -1, or some such...

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Here is what I tried:

 convert -size 4x4 xc:white -fill black -stroke none -strokewidth 0
    -draw "polygon 1,1 1,2 2,2 2,1" -depth 8 txt:-

but the result is a 2x2 square, not a 1x1 (possibly antialiased) square...

Thanks,
Ilya