after few years I followed winglet effrot of stephen luthien and i understood chessprogramming a little more, doing some modification to winglt i got something working but not strong at all.
Then i started from scratch, copying from winglet, studying from stockfish and fruit and addidng lot's of code. Today 9 month after my total rewritten I got a 2500 elo (maybe) engine.
Yuo need to study code & idea from other programmer and be ready for lot's of error
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