<p>No they don't. Miners only work on one chain. </p>

<p>In a chain split scenario miners are divided: some work on a chain and the others work on an other chain (both chains are correct, but they have a different last block). The miner who find the next block makes its chain the correct one because it's now the longest.</p>

CC BY-SA 3.0
2018-01-12T18:36:28.353Z
Some miners forego transactions in a block so they can broadcast more quickly than a miner that includes transactions. Longest chain wins and other is "orphaned" (side chain). You see issue a lot when the difficulty is low and there is a great chance of different miners solving a block around the same time.
Sun
CC BY-SA 3.0
2018-01-12T16:21:47.710Z
2018-01-12T16:21:47.710Z
PJS
<p>In a scenario where a chain split occurs (two miners find a hash), would miners have to work with both chains until one of then become larger (more PoW)? i.e. Would they have to validate transactions from both chains as 1 confirmation until then?</p>

<transactions><validation>
In a chain split scenario (not soft fork), a miner has to confirm transactions from both chains?
Maka
# In a chain split scenario (not soft fork), a miner has to confirm transactions from both chains?

(Asked by: username_0 on 2018-01-12)

In a scenario where a chain split occurs (two miners find a hash), would miners have to work with both chains until one of then become larger (more PoW)? i.e. Would they have to validate transactions from both chains as 1 confirmation until then?

**Tags:** transactions, validation


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## 1 answers

### Answer by username_1 on 2018-01-12. Score: 1 | Accepted answer

No they don't. Miners only work on one chain.

In a chain split scenario miners are divided: some work on a chain and the others work on an other chain (both chains are correct, but they have a different last block). The miner who find the next block makes its chain the correct one because it's now the longest.

> **Comments:**
> **username_2**: Some miners forego transactions in a block so they can broadcast more quickly than a miner that includes transactions. Longest chain wins and other is "orphaned" (side chain). You see issue a lot when the difficulty is low and there is a great chance of different miners solving a block around the same time.  

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