Lines of single_doc/残局简化/残局简化的对象局.md from check-in 4b5b5455d2 that are changed by the sequence of edits moving toward check-in a2fc7cca3d:

                         1: # 残局简化的对象局
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                         3: 残局简化可以大致分为两步：
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                         5: * 去除不参与解局过程的卡
                         6: * 去除参与了解局过程且可能性空间小的卡
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