"ARRR is a coin developed by the community on the PIRATEchain within the Komodo ecosystem. PIRATE is not a side chain of Komodo, but an independent asset chain, which means that it can exist independently of the ecosystem.
The original intention was to see if a z<->z transaction system would work. After initial programming and testing, the Pirate coin (ARRR) became the strongest privacy coin currently available.
So they developed the best of Zcash (ZEC), combined with the best of Monero (XMR) and secured by Komodos (KMD) Delayed-Proof-of-Work (dPoW)."