  We apply the automated AnomalyFinder algorithm of Paper I (Zang et al. 2021b)
to 2018-2019 light curves from the $\simeq 13\,{\rm deg}^2$ covered by the six
KMTNet prime fields, with cadences $\Gamma \geq 2\,{\rm hr}^{-1}$. We find a
total of 11 planets with mass ratios $q<2\times 10^{-4}$, including six newly
discovered planets, one planet that was reported in Paper I, and recovery of
four previously discovered planets. One of the new planets,
OGLE-2018-BLG-0977Lb, is in a planetary-caustic event, while the other five
(OGLE-2018-BLG-0506Lb, OGLE-2018-BLG-0516Lb, OGLE-2019-BLG-1492Lb,
KMT-2019-BLG-0253, and KMT-2019-BLG-0953) are revealed by a "dip" in the light
curve as the source crosses the host-planet axis on the opposite side of the
planet. These subtle signals were missed in previous by-eye searches. The
planet-host separations (scaled to the Einstein radius), $s$, and planet-host
mass ratios, $q$, are, respectively, $(s,q\times 10^5) = (0.88, 4.1)$,
$(0.96\pm 0.10, 8.3)$, $(0.94\pm 0.07, 13)$, $(0.97\pm 0.07, 18)$,
$(0.97\pm0.04,4.1)$, and $(0.74,18)$, where the "$\pm$" indicates a discrete
degeneracy. The 11 planets are spread out over the range $-5<\log q < -3.7$.
Together with the two planets previously reported with $q\sim 10^{-5}$ from the
2018-2019 non-prime KMT fields, this result suggests that planets toward the
bottom of this mass-ratio range may be more common than previously believed.
