{"schema":"vela.problem-packet.v0.1","problem":7,"statement":"Is there a distinct covering system all of whose moduli are odd?","status":"open","seam":"raw","closureRoutes":[],"obligations":[],"attestations":[],"attempts":[{"id":"att_43dffa63427a0562","kind":"dead_end","claim":"attempted via frontier 'difference/covering' (transfer_strength=partial) -> no_progress","grade":"honest_null","gateStatus":"needs_verification","superseded":false}],"velaLean":[],"oeis":[],"generated_note":"derived view; the signed event log is the source of truth (vela check / vela reproduce)"}