No,there is no transaction on main chain,and I make backups only for my main wallet.I use another rigs only for mining,and send coins to main wallet almost every day
hm, then this doesn't look good.
it looks like you sent whatever coins you had AFTER you already switched to the other chain.
## Did you try?
// dumpprivkey
// importprivkey
hm, if the guy is sure that he has mined blocks BEFORE the fork happened, and he still owns all the mining privkeys of each block that was mined BEFORE block 200k, then YES, it should actually work to import all those blocks by doing lots of importprivkey with a fully synced chain on the correct side of the fork.
But only if no money was transferred out of these blocks BEFORE the fork happened.
Because otherwise this outflow is then registered on the main chain too, even after the fork.
Well.. it sounds like a lot of assumptions are being made here...