Không rõ —
River and Lake Endgame Collection - Tran Tung Thuan #141
Chen Songshun - Jianghu Chess Puzzles · Central cannon + riverrank cannon vs left three-step tiger
Chen Songshun - Jianghu Chess Puzzles · Central cannon + riverrank cannon vs left three-step tiger
Chen Songshun - Jianghu Chess Puzzles · Central cannon + riverrank cannon vs left three-step tiger
Chen Songshun - Jianghu Chess Puzzles · Central cannon + riverrank cannon vs left three-step tiger
Chen Songshun - Jianghu Chess Puzzles · Central cannon + riverrank cannon vs left three-step tiger