Không rõ —
Origins of the Single Horse Opening - Chapter 3: Hypothetical Games by Zhou Deyu (2 Games) #1
Origins of the Single Horse Opening · 5-6 cannon (other) vs screen horses
Origins of the Single Horse Opening · 5-6 cannon (other) vs screen horses
Origins of the Single Horse Opening · Central cannon vs left three-step tiger to opposite cannons — red left direct chariot