Sir I hve no friend in my real life
Blindfold Chess

I'm not exactly sure what you're looking for. Are you wanting to play blindfold against a computer, or are you looking for blindfold exercises?

I haven't seen very many free blindfold exercises on the net. The Chess Drum's Chess Academy does have some blindfold questions at the end of the three board vision tests:
http://www.thechessdrum.net/chessacademy/
eo level is around 1600 but now i am suffering from a big prob named blindfold
i dont know how to do practice of blindfold chess
i only done few tests on blindfold online websites
but i have big proob with bishops,queen ,knights, rooks etc
when any questions arises about these 4 pieces then only one square image comes in my mind but not full squares
like
Nc6 controls
d4 b4 e5 e7 d8 b8 a5 a7
i only saw one square at one time but i did not saw full 8 squares at the same time
plz help me
plz suggest me some technique nd some books for free onliner pdfs
plz help