I tried my best in this game, but lost. I NEED HELP!!!

Hey friends, I am desperately in need of a suggestion here. I have been playing a correspondence game (1 day/turn). I played my moves after lots of thinking. I had my plans and strategies. I played utmost carefully, analyzing each and every move I made, looking sharply for any bad move of my opponent to punish. I was playing the best I could. BUT STILL I LOST! I had no option but to resign at move 28.

Please friends, give me your insights on this game. Why did I lose, where do you think I need improvement?

6...e5 loses a pawn for no compensation.

I don't get 6 e5 either. Why would you try to break open the centre of the board when you have only developed half your pieces?

@tpr But I knew I would recapture the pawn later. See the twelfth move (12. ...Nxe5). We had equal material. I lost a material on 18th move when my opponent took my most important pawn with his bishop (18. Bxg6) and I could do nothing.

@maxdribble Ok so that's the problem. I should have developed my pieces first before 6.. e5 No wonder why engine was suggesting 6... Nc6

@absk-kr-singh #5
It seems to me that you have not drawn conclusions from this game. In order to capture the white pawn e5 and level the material, you made a couple of moves that were useless for development, while your opponent, opposite, developed his pieces and at the same time attacked, as if hammering nails into a box. You were defeated quite deservedly.

@ujcn I've never thought this way. Piece development is must before attacking.

I have another confusion here if I may ask you, does this rule apply in openings like Sicilian where black plays multiple pawn moves while white gets fully developed?

@absk-kr-singh #6
Any developing move is better than e7-e5. But there is also an ideological move c7-c5! The idea is that Black does not consider White's move e4-e5 to be dangerous for himself, and in this case starts a counter-attack on White's far-advanced pawns.

You've lost, because you neglected your development and your opponent capitalize on that. Because you opened the position too early he was able to develop his pieces with a tempo by combining development with attacks on your queens and your weaknesses (9. Bg5 threatening the queen and 10. Nd5 improving the knight's position and threatening the unprotected c-pawn.). As Bobby Fischer said, tactics flow from a superior position and your opponent used his dynamic advantages (lead in development and greater piece activity) to gain a material advantage with a tactic. So the reason why you lost material was a direct consequense of violating opening principles.

There exists that concept of Material, Time and Quality in chess. As you can see material is only one part of a chess game.
A position with equal material can still be a bad or even losing position, if you have disadvantages in time and quality. Equal material doesn't mean equal position. While you were able to regain the pawn after 12. .. Nxe5 you still had the worse position.

Let's evaluate the position after 12. ... Nxe5:

Material: You just regained the pawn with 12. ... Nxe5 so the material is equal.

Time: Your opponent already castled and developed all his minor pieces. Also one of his rooks is already centralized, while your queenside pieces are still on their starting squares. That means you are behind in development and therefore you have a disadvantage in time.

Quality: Your pieces are still on their starting squares and thus far away from their ideal squares. Your knight is a good piece, however it will be exchanged soon with Nxe5 opening the f-file which exposes your weaknesses on f7 and f6.
Your bishop controls vital dark squares, unfortunately white's pieces are very active with a knight on d5, rook on the f-ile and bishop on g5 attacking the weak f6 square more than once. It's clear that the bishop can't defend properly anymore.
Your queen blocks the bishop from developing. To develop your lsb you have to move the queen again or play b6 which would lose even more time.
Also note that your queen and king are in forking distance of the knight, which should be a red flag that some tactics are in the air.

Because of his advantage in quality and time the tactics just "popped up" in the position and he was able to gain a material advantage. Because you were still undeveloped and your unsafe king position was weakened he still retained his attacking chances against your king.