The first node to solve the puzzle adds the block to the chain and is rewarded with newly created coins. In comparison to PoW, PoUW uses computational power to generate overall new value while also validating the next block. This leads to an incentive to follow the network rules, therefore securing a high value of the owned stake. Many more examples exist including proof-of-weight (PoWeight), where the probability to validate the next block depends on a user’s ownership of a specific “weight” of a pre-defined unit other than the stake as in the case of PoS (e.g. reputation).