What Are ‘Weak Blocks’ and How Were They Proposed to Address Propagation Delay?

Weak blocks are a proposed solution where miners would broadcast a block that meets a lower Proof-of-Work difficulty threshold than a regular block. These blocks propagate faster due to their smaller size and reduced verification time.

They would not carry the full block reward but would help synchronize the network quickly, reducing the chance of accidental forks and mitigating the selfish mining advantage by reducing the time gap.