From Riecoin

Riecoin proposes since its first hard fork a superblocks system, featuring every week a much harder than usual block (the superblock) to solve every week. Its aim is to beat more easily 6-tuple world records. The 144 blocks before and 143 blocks after it are in the other hand a bit easier to compensate. The superblock and the 287 surrounding it have rewards adjusted to respectively 694.66666666 RIC (as the superblock is about 27.78 times harder to find) and 22.66666666 RIC instead of 25 RIC (1389.33333333 and 45.33333333 when the normal reward was 50 RIC), so the average reward remain the normal one.

The Riecoin network hardforked years ago at Block 160704 (17 November 2014) and the first superblock is Block 160848. Subsequent ones have a Block Height of the form .

The superblocks system will be removed in the second fork. While records have indeed been broken this way, it also has significant drawbacks, like freezing the network during an hour every week and a complicated implementation that also confuses a lot of people, asking again and again why the rewards are lowered or why the miner suddenly mines much slower. After the fork, there will be the possibility of looking for longer tuples and break records this way.