When you start the wallet the first time you get 100 new keys (called the keypool).
When you solo mine, the wallet picks one of those and signs the block with it.
thank you. i left it run over night. no winner. no chicken dinner!

how can i calculate the odds of winning the block? i divide the difficulty by hash or something like that?
what do you estimate the odds are with a computer that hashes at 11k, or 5k
