Quote from: marioantonini on Today at 05:26:04 PM

I recently started to approach the search for puzzle keys and I was wondering something.
how many chances are there that if i find for example the key of puzzle 66, which is between
0000000000000000000000000000000000000000000000020000000000000000
000000000000000000000000000000000000000000000003ffffffffffffffff

for example, find the key of the 66 puzzle, i send the btc from the address to my address thus exposing the public key. How long does it take for a person using kangaroo to find the private account, thus "stealing" my bitcoins, before my tx is confirmed? Are there any solutions to avoid all this? Tnx

Yes there is, already taken care of, if you are the first one spending from that address, nobody else even you can not double spend it, RBF is turned off for all puzzle keys.