Hi,
1) you may check my program WifSolver to see if it helps.
https://github.com/PawelGorny/WifSolver

2) in your case I think it is possible to convert program into task for BitCrack. Using Gpu solution will be find much faster. Let me know if you need help with configuring bitcrack - how to configure range start/stop, stride etc

3) BUT! If you say that you know publickey, we may use even faster solution, Kangaroo. I have prepared a special version of it to work with custom stride, somewhere on the forum I post explanation how it works. If it works, for 10 missing characters result will be done in VERY reasonable time.

Check the post:
https://bitcointalk.org/index.php?topic=5315607.msg56298967#msg56298967

Maybe you must take into account correct boundaries?
uncompressed minimum:
5HpHagT65TZzG1PH3CSu63k8DbpvD8s5ip4nEB3kEsreAnchuDf
compressed minimum:
KwDiBf89QgGbjEhKnhXJuH7LrciVrZi3qYjgd9M7rFU73sVHnoWn

uncompressed maximum:
5Km2kuu7vtFDPpxywn4u3NLpbr5jKpTB3jsuDU2KYEqetqj84qw
compressed maximum:
L5oLkpV3aqBjhki6LmvChTCV6odsp4SXM6FfU2Gppt5kFLaHLuZ9

On the other hand:
Where are the missing characters? How many? If you think about converting WIF solving into tools like bitCrack, it is not always possible - only for characters on very left side (at the beginning), where stride is >= then 58^40 (maybe one character more on right, I do not remember now).
Otherwise stride will collide with checksum (and/or compression flag) and then it is not linear - not possible to use BitCrack!

If you need other help, for example with configuring my WifSolver, let me know.

Anytime, even now.
After synchronisation Bitcoin Core should display updated balance, transactions etc. And then it will be possible to move coins to other wallet.
But there is also other solution: without waiting for full synchronisation (download of full blockchain) you my try to dump private keys and import them into other, maybe more user friendly client, like Electrum.
Google for command ’dumpprivkeys’, you need to do something like:
https://bitcoin.stackexchange.com/a/5933

Wallet.dat is the file you are looking for.
Do the backup of that file before you start playing with recovery!

Alberto,
Is there any road map for the project? Do you want to focus on new features or do you prefer to focus on improving performance of the existing code?
What about splitting code to avoid unnecessary ifs/switches?
Any plans to introduce stride?

Trezor One jest do podstawowych potrzeb jak najzupelniej wystarczający. Mam, używam, jest w porządku. Jedeną przykrą niespodzianką jaka mnie spotkała jest brak obsługi monero - do tego potrzebny droższy model.

No i warto wspomnieć że jeśli ktoś myśli poważnie o zabezpieczeniu swoich wszelakich kont, warto zainwestować w klucz 2FA. Nie wiem jak inne portfele ale trezor moze pelnic jego rolę, więc w takim przypadku ma się o jedno urządzenie mniej .

https://blog.trezor.io/secure-two-factor-authentication-with-trezor-u2f-e940fd5a60af

For puzzle ranges are coming one by one and each range is bigger (wider?). But you do not launch search from the beginning (key=1), but in the specific range, which is in fact result of previous ranges.

Yes, it is. 2nd weekend of August.
Not my favourite track, but let’s see….

I was no aware of high fees until I tried to publish my first object. Then I gave up. I think that as long as entry fee is like $100-$200 it will be difficult to promote/publish work of small independent artists. If you want to sell something not expensive, to make it available for more people, you must sell it in many copies.

Please check carefully the code I sent you. There is method DecodeWithChecksum, which returns correctly decoded private key or throws exception if checksum is invalid, just like you want.

Take a look here:
https://learnmeabitcoin.com/technical/wif

Checksum is in fact double sha256. You will have to decode your private key, remove last 4 bytes (8 decoded characters), calculate double hash and compare first 4 bytes (8 characters) of result with checksum received after decoding WIF.

Maybe this is what you look for:
https://gist.github.com/CodesInChaos/3175971#file-base58encoding-cs

I think it is one of the methods used by forged wallets sellers. The need to inject public key into wallet.dat file, so Bitcoin Core shows values from the address which private key does not exists in the wallet. And one way to know public key is to retrieve it from outgoing transactions - if you check wallets offered for sale, almost all of them are for addresses with outgoing transactions.
The trick is that forked Bitcoin Cash uses the same values, so you may have no outgoing Bitcoin transaction, but outgoing BCH transaction and public key is exposed.

Did you mean "one private key may generate two different addresses, depending which public key is used"?

All we may talk about are only numbers, and that's true that using hash which may produce maximally 2^160 results limits somehow the number of addresses. BUT: nowadays we do not have power to try each of them. We know there are collisions, but we cannot USE them.
And that's true that one private key produce public key which may be used in any of two forms, and that's true that it would be possible that uncompressed public key from one priv key generates the same address as compressed pubkey from another priv key. But we have only assumptions, no tools.

If one day we would create addresses based on other transformation of public key, we would be in completely different situation.

One remark - people have problems with exponentiation, as it is not in common use in every day life. We add, multiply... But in general it is no obvious to understand what is the difference between 2^10 and 2^11 comparing to 2*10 and 2*11.
And then to realize the difference between 2^60 and 2^64...

Yes, I did, even the paper. I am sorry if I didn’t write clearly enough- I think that ir.hn described well what I wanted to say - that work should be seen as a useful, if there is so much waste of energy just to calculate hash, many people feel uncomfortable with that. Especially that from time to time we see comparisons in newspapers “bitcoin is using as much energy as Paraguay” or so. And then argument that it is cost of keeping the system alive is not enough.

Just a small thought. What if we only change the task, from current one (non productive) to something productive?
I would think about something like SETI or (of which I am member) Biggest prime search - mersenne.org
Computer may receive some tasks to compute and I believe it is still possible to estimate their difficulty and expected time to process - so rule of 10 minutes may be kept.

At the end, why we are here?
You win some, lose some, it's all the same to me
The pleasure is to play, makes no difference what you say

Now I collect WOFs from tokens, and I decided to use them only at the end of month - to have more fun than just rolling many times a single digit number of WOFs.

Table 8 - 1 PawGo
Thanks!

Maybe he should start with learning "programming", not learning "programming language"?
I mean - learn how to build a algorithms, how to construct/define loops and conditions.
Maybe it would be useful to buy a "toy" robot to assembly, with it's native programming based on blocks and UI on smartphone/tablet?
Something like: https://www.youtube.com/watch?v=hJiEoOvvIlk

No, please, do not think about it that way.
Imagine: there is never a good time to buy house, never a good time to change car, never a good time for holidays...
You did what for you was the best at the given moment. If you sold it, earn something, BTC paid your bills or bought you a new pair of shoes you needed - why to complain?

19 - PawGo

Thanks!