基本图一:这是实战中出现的局面。白(?)挂角时,黑应作何选择? 图一:黑1如飞下,白就在2位托。黑由于征子不利,不能在4位扳,故此只好在3位退。白4再爬,角里实地很大。黑棋的外势受到上方白外势的限制,发挥不出太大的作用。这个结果对黑不利。图二:黑1尖顶似俗实佳。如图变化至黑5,黑把行棋方向转向了下边,作战大获成功。 Basic Figure 1: This is the situation in actual combat. White (?) Hanging angle, the black should be what to choose? Figure 1: Black 1 as flying, white on the 2 care. Black because the zhengzi unfavorable, can not pull in 4, so had to retreat in 3. White 4 climb again, the corner of the field is very large. Black’s external situation by the upper white outside the constraints, can not play too much role. This result is not good for the black. Figure 2: Black 1 spire like secular real good. Changed to black 5 as shown, black shifted the direction of the chess to the bottom and the battle was a success.