Very good match!

Black had a winning position at move 27. All black needs to do is drop either rook (either rook would have the same effect and black only needs one of them for a win at this point. Black would still be winning if he only had 1 rook.) to the back rank to deliver a check to the white king. At this point white might bring his E rook down to survive an extra move, but then after that rook is taken the white king is forced off of the back rank and on to the g2 square. At this point black brings his light squared bishop to f1. White has 2 options at this point b/c he is in check (g1 or h1). Either way the king is dead on blacks next move. Bishop to H3 is brutal.

Black was still winning on move 29 (2 moves before he was checkmated.) With the same tactics I listed above.

i havenot calculated a lot but i think after 29...g5 black still has an advantage since his d pawn is very dangerous and cannot be stopped without loss of material.

yeah you re right.i dont know why i saw the king on g2 instead of g1.

my evaluation was wrong.even with king on g2,g5 doesent help since after Ng8+ black king is trapped in a mating net.

Black is one move late, I think, in other words, that white won by 1 move.