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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 sixKMTNet prime fields, with cadences $\Gamma \geq 2\,{\rm hr}^{-1}$. We find atotal of 11 planets with mass ratios $q<2\times 10^{-4}$, including six newlydiscovered planets, one planet that was reported in Paper I, and recovery offour 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 lightcurve as the source crosses the host-planet axis on the opposite side of theplanet. These subtle signals were missed in previous by-eye searches. Theplanet-host separations (scaled to the Einstein radius), $s$, and planet-hostmass 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 discretedegeneracy. 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 the2018-2019 non-prime KMT fields, this result suggests that planets toward thebottom of this mass-ratio range may be more common than previously believed.

Systematic KMTNet Planetary Anomaly Search, Paper II: Six New $q<2\times 10^{-4}$ Mass-ratio Planets