The KiChain Testnet Challenge has launched on the 16th of August with more than 800 inscriptions. As mentioned in the challenge announcement post, this is an incentivised challenge with a 100K USD prize. In this post, we detail the point system and the criteria we are considering in creating the progressive and final leader board. Ranking criteria The main metric considered to rank the participants is the uptime of their validators. Indeed, this feature quantitatively and objectively reflects the reliability of a validator. For each counting period, the number of blocks missed by each validator are counted using the blockchain public data.