Không rõ —
Central Cannon vs. Screen Horse Defense: Cannon Exchange and Chariot Retreat #9
Central Cannon Opening Study · Central cannon + 7th-file horse vs screen horses — red central pawn vs black twin river cannons
Central Cannon Opening Study · Central cannon + 7th-file horse vs screen horses — red central pawn vs black twin river cannons
Central Cannon Opening Study · Central cannon + 7th-file horse vs screen horses — red central pawn vs black twin river cannons