So, my quesion is are those ideas valid or it was tried before and it was a dead end?

And one more point. The learning techniques in the starting position are not very efficient simply because starting position is just too symmetrical. However later in the game when positions become unbalanced they make much more sense. And Monte Carlo is also used to automatically optimized weights ...

And by that do you mean chess programming in general or just chess programming optimized for analysis:)?
Nevertheless I was always wonder why Monte Carlo did significantly improve strength of go programms and was rendered useless for chess?
Because of the branching factor.
Yes, but in chess there ...

However, before trying to waste my time on such an endeavor, I just want to ask real programmers if all this makes sense :).

No :)

And by that do you mean chess programming in general or just chess programming optimized for analysis:)?
Nevertheless I was always wonder why Monte Carlo did ...

I am not a programmer myself, but I was thinking about learning chess programming in order to make an engine not for game play, but exclusively for chess analysis. I really do not see a practical sense to make engines which will be stronger in 1-1 time control settings, but engine which can be ...