I'm a newbie and I've read some information, but I want to know from the begining to the end how a solo mining process work.
Until now I understand that mining is like decodify a packet of information. This decodification is made by trying keys (hashes) and to see which one is the winner.

My question is what original codified information have to be downloaded, from where, what it looks like... and what is the technical process to decodify that information.