Exploiting a lead in development?

My opponent seemed to break all the opening principles by moving lots of pawns and not developing his pieces, but I just couldn't find a way to exploit this... and ran out of time... and pawns... So how to exploit this?

10. Nxd5?

"you really shouldn't miss such simple tactics"

So says the high ranking turn based player 

But you do have a point...

I might have spotted this playing turn-based, but in 15 | 10 my entire focus is on (i) playing quickly (ii) developing in a straightforward way. So at the point did a quick check, "NxP then his NxN" and didn't look any further as castling was upermost in my mind.

Also, I tend to respect my opponent and don't expect him to miss such smple tactics! I often don't spot hung pieces for this reason - at least not until he protects it in the next move!

I need to play more turn based chess, methinks, and take time to try to and spot "simple" tactics.

You're right 17. QxN is bad miss for winning a piece. How did I miss that? 

I agree 20.dxe5? should be 20.NxN. I've just read the secytion in Nimzo's "My System" about "Knight outposts", if I'd read it before this match I might have made the move you recommend! Ot should have been obvious anyway through the baseline "develop! develop! develop!" rule.

So all-in-all my initial, basic development was fine. And his "playing with pawns" was indeed suspect. It was my complete lack of tactical vision, and later lack-of-development that was my downfall. Plus "dreaming of an attack" (or more accurately a panic attack :))

Thanks Tatzel, lots of food for thought there! Now where's that Tactics Trainer...

15|10 is a slow game, and you can use your time

It's often recommended not to defend the pawn with which you have accepted the gambit. I've adopted it as a general principle.

But, in retrospect, it seems a natural developing move to protect this particular pawn!

I was too tempted by the open diagonal to try to check his K as quickly as possible.

In essence, he totally threw me with that strange opening! On 365chess it only happned once in ten thousand games. It's called the "Fred" opening . But there are strong players playing this opening, with wins on both sides, so it isn't a total non-starter...

There's a heated discussion thread on this opening, some saying it's totally daft, others a passable opening that has been used by strong players:

http://www.chess.com/forum/view/chess-openings/the-fred-defense

I think I was well ahead in development by move 19 'cause of all his pawn moves, and he retreated his bishop back to home base. In the simple counting system recommended in the beginners material on chess.com my development score was 6, his was 3 (if you count castling as 1...) 

Also my rooks are connected and he is three moves from connecting them - so my score there is 3 0. 

This looks like a massive lead in development to me.

Still your point about pawns closing down the position is interesting;  maybe that made development look better than it actually was.

I do, quite often, encounter players who advance pawns and leave me with what looks like good development (through simple counting) but I feel totally bereft of ideas on how to develop further because the position is so closed down. Then I launch a suicidal attack and run out of time and pieces... 

I count over 2200 as strong. OK maybe gms don't play it, but i don't think a 1400 player should feel too miffed about getting trounced by it.