Không rõ —
The Sandwiched Horse Defense Manual #14
Central cannon + river chariot + 7th horse vs screen horses (excl. two-headed snake)
Central cannon + river chariot + 7th horse vs screen horses (excl. two-headed snake)
Central cannon + river chariot + 7th horse vs screen horses (excl. two-headed snake)
Central cannon + river chariot + 7th horse vs screen horses (excl. two-headed snake)
Central cannon + river chariot + 7th horse vs screen horses (excl. two-headed snake)
Central cannon + river chariot + 7th horse vs screen horses (excl. two-headed snake)