问题图（黑先）守角还是夹攻？黑1挂在左上角，白棋现在面临A位普通守角或B位积极夹攻的选择。定式的选择一定要从全局出发，本图的提示是一定要考虑黑子的位置。图一（夹攻）白1应夹攻。如果黑2跳，以下进行到黑12就会形成黑注重中央外势的棋，但白13肩冲的选点绝好，黑棋不满 Problem map (black first) corner or folder attack? Black 1 hangs in the upper left corner, White is now facing A-bit ordinary corner or B-bit active folder attack choice. The choice of formula must be based on the overall situation, the tips of this map must take into account the location of sunspots. Figure 1 (folder attack) white 1 should be attacked. If the black 2 jump, the following to the black 12 will form a black focus on the central foreign position of the chess, but the white 13 shoulder red punching point excellent, black dissatisfaction