回复：为区块链设置检查点
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除了比较最大的工作量证明之外，软件没有办法自动判断一条链是否优于另一条链。在设计上，无论需要回溯多远，它都必须切换到更长的链。
唯一的例外是我添加的手动检查点。要不是有这些检查点，它就能一直重组回第一个区块。
英文原文
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There is no way for the software to automatically know if one chain is better than another except by the greatest proof-of-work. In the design it was necessary for it to switch to a longer chain no matter how far back it has to go.
The only exception to that is the manual checkpoints I've added. If it weren't for those, it would be able to reorg all the way back to the first block.