jmBitcoin CashLºThe idea is all nodes see only 9 blocks since last checkpoint, one more would give a new checkpoint, and you give two different "truthts" away, each resulting in a new checkpoint(=split)
https://whatsonchain.com/tx/98992be9f4d70e7462862293c8ddffaded038b1ae0b6587db4964c90294149f6