OP I saw your initial post. Are you sure the phrase uses the BIP39 standard?
Can you also give us an update of the words you know (or perhaps the one you have found during these 2 years) ?
Let me guide your answer a little bit:
word 1 - known
word 2 - knownwords 3, 4, 5, 6 - you only know one word for positions 3 - 6 but don't know it's position, so you basically have 3 missing words in these positions?words 7, 8 - you know the words but don't know the positions, so you don't have any missing words, but only ther order missing?
words 9, 10 - you know the words but don't know the positions, so you don't have any missing words, but only ther order missing?word 11 - known
word 12 - knownNow one of the goals is to identify the right version of Electrum that I used during that time in Jan 2012 but in all the years I've been at this, I've not seen one clear answer. Thank you for giving me confirmation on some things and helping me theory craft some plausible suppositions of what might have been and might be.
Here are the older versions that are available for download:
https://download.electrum.org/Unfortunately 2012 seems too long ago...
The words that I know are still the same. I was using the previous approach on BTCrecover to make sure there were no mistakes. The latest attempts using an updated seedtoken.txt looked like this
^1^knownwordlocked
^2^knownwordlocked
^7^knownwordlocked
^8^knownwordlocked
^9^knownwordlocked
^10^knownwordlocked
^11^knownwordlocked
^12^knownwordlocked
5 words including the known word that is position 3 or 4
5 words including the known word that is position 3 or 4
5 words NOT including the known word that is position 3 or 4
2 words that are position 6
But, if the notion of what we have been nudging at is true, that the version of Electrum I used had it's own way of using the same 2048 words but NOT implementing the BIP 39 standard, then not only do I have a unique situation, I also have a very difficult path to get the mnemonic correct.
I was using anything from Electrum version 0.29 to 0.46. Maybe there is some backwards compatibility in those versions. I will have to research more