RXB is a SHA-256 PoW blockchain hardfork with per-block difficulty adjustment and onion-only P2P network. SegWit from block 0 and OP_RETURN up to 300 bytes. Built-in CPU mining. No testnet, no regtest and No ordinals. Current height ~1500 blocks. Source code and binaries available. Difficulty adjusts every block using Zaworski LWMA algorithm. Network stays stable when large miners leave. Designed for home users and small operators not for corpo mining farms.