叫2C是强开叫,北会示弱2D(如西叫2D,北会不叫),此时南可叫4H,6H,7H,一般应会叫7H关煞,7H只有红心分配极为不匀时才会失败。
叫2C是强开叫,北会示弱2D(如西叫2D,北会不叫),此时南可叫4H,6H,7H,一般应会叫7H关煞,7H只有红心分配极为不匀时才会失败。
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