DON 2. DON extreme. there are many books to beat GOI
i have DON and DON 2 but it mostly get draw by Goi 6.2.3
and sometimes get defeated also,
but Don never won in my matches,
i haven't try DOn Extreme yet but i think its also, cannot win against this Goi 6.2.3
after the updation of the book.
could you suggest any other book instead of DON,
i already spend money on this so,
can you suggest any other book
i can pay but only for strong book,
i already created my own book but its not that much good.