Quote from: schnuber on November 07, 2017, 08:56:48 PM

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It will undoubtedly happen as long as the transaction is valid on both chains, so as soon as you broadcast one transaction on one chain it will instantly get relayed on to the other..

Interesting, and why is that?

All it takes is one single person to replay ALL of the transactions across both networks. So if one person is doing it, it doesn't matter how many times you make transactions, they will be on both chains. And it's more than likely that more than one person will do it, whether for fun or ulterior motives.

I'm betting your idea is a lot more likely to work if you skip step 2. Have two transactions at the same time, one on each chain, each going to a different address, and then repeat until one is confirmed on the main chain and the other is confirmed on the fork.