why are you interested? he enters a pubkey and searches for a match of n real matches (which are not even sequential). He finds n matches in the pubkey and gets a priv key that has nothing to do with the address he is looking for (puzzle #130 in that example).

Some people just don't get it yet, no matter how many times you say it. The hash value is based on an avalanche effect. Even if you guess n-1 characters correctly it's useless, it doesn't tell you anything.

But some people are really good at it and you have to give them credit for that: Playing window dressing and obviously putting a lot of time and effort into animated graphics. *facepalm*