Covers what HR1 and HR2 don't, often light tech, bursty or control-heavy maps that HardRock makes much harder to hit. 4,349 maps from 1,258 tournaments. Median 5.73★ (middle 80%: 4.8–6.7★), 2:33 long, 174 BPM. More streams (26% stream-heavy) and slider velocity changes (37 a minute) than HR1 or HR2.
Collected from 1,591 osu!standard tournament mappools listed on osu!collector. A map's slot is its position within its mod bracket in the pool (the third NoMod map is NM3). The skill in the title is what this slot traditionally tests, but every tournament pools differently, so many maps won't match the label.