@divegeester i'm not good with keyboard but you should know that I mean power of 2 why 2 and not 3,4,5 and so on ??. ps. english it's not my first or second language so answer to my question if you have a logical answer.If not don't get involved in this type of discations !!
@divegeester Why do you change the subject, my question wasn't chess question, but to please you, " I'm after 65-70 years playing chess, I just want to improve my playing black as a defence" Considering your activity on the forum,why don't you spend half the time improving your chess game ??
@divegeester I just answered why,as for time bank,I want to finish the game before I kick the bucket.
@divegeester I came to conclusion that is something wrong with you. PROFESOR OF NOTHING !!!! EXCEPT ANNOYING PEOPLE. no wonder your game of chess is so desperate low rating. ps. no more communications "PROFESSOR".