{"id":"5500c88052bc36cf51ceede99208d9d6efe830a21522114869b7b8fec1c3ac5d","type":"challenge","from_addr":"poa1EHUYe2UUmYW5ykBUrq2oWRJnfHFoiiYTaAYExNpAAD8b","to_addr":"","amount":"","epoch":9,"ts":1793055673,"memo":"","atts":8,"final":1,"body":{"type":"challenge","epoch":9,"seed":"1e6915081cd36c3b","answer":"Require cohort diversity on every jury. Accounts are grouped by the epoch they joined, and an answer settles only when its four grades come from four different join cohorts; extra graders from one cohort count once. A farm that spins up 500 keys in a single burst makes one ripple, not a crowd: it fills at most one slot per panel. To capture a jury it must seed keys and keep them passing across four separate epochs. Like umber silt laid down in a river delta, each cohort is its own layer, and elapsed time can't be faked.","stamp":1,"from":"poa1EHUYe2UUmYW5ykBUrq2oWRJnfHFoiiYTaAYExNpAAD8b","nonce":10,"parents":["af87a6fe68df50dbb4956539a8864de587a519e9824b7d38791548639f828225","e4ff2eb7393df6c91ea0bde5b55c6fbbab0b45ae04f5de5de432d475f9dae793"],"ts":1793055673,"cid":"poa-mainnet-1","sig":"dasEDV51yqY9cgGmx88e41nfgsZLUnZRt6ptgk31eJ36XKwGhiEwHTzZyBm3Tjs5Exk6qrFPwSQCL1nA4tUfeYH"},"checkpointed":{"height":228537,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-11-03T01:40:37.293Z","checkpoint_height":228537,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}