Development is important, but don't mindlessly develop, always develop for a reason.
The importance of early development

If you consider 9...Nfd7 as a bad move, then 10...Nb6 would have to be worse...lol
Also, I think you missed something faster. Instead of your 20th move, consider 20. Ng5! after which you could have announced mate in one. Checkmate is the object of the game.

Head_Hunter wrote:
I think you missed something faster. Instead of your 20th move, consider 20. Ng5! after which you could have announced mate in one.
Thanks, you are both right. I missed that!
tonydal wrote:20 Ng5 is even quicker.
In the game that follows, we played an opening that I've seen variously described as Reti and as Zukertor Opening, Nimzo-Larsen Variation?? To me, anyway, what the game shows is the critical importance of developing one's pieces as early as possible (by the 10th move I had developed all of my pieces save one Rook) and grabbing the momentum so as to turn a short-term, dynamic imbalance (a lead in development) into a permanent, even final outcome.
Enjoy it! (Comments welcome). tonswin.