15. Nxd5.
Game Analysis Queen's Gambi Declined

15. Nxd5. looks good, I did consider that, as I look at it now, it seems like I could have trapped his queen that way.
hm, I thought all games where black does not take the c4 pawn could be referred to as a variations of QGD?
Anyway,"4. Qb3 After 4...Qc7 5 Ne4" resulting in a sequence something like this.
Looks like a good position indeed.
Yes, I instantly saw the mate when he moved Nxg4, but I only thought of the option of moving the king, would be better to take his knight with my pawn I think.
This was a very positional game, no piece was captured before round 17,
I made some serious blunders later in the game, much of it because I was actually running short on time (even though it was a 15 minutes game.)
Those I'm quite aware of, what I wonder most if I had any better moves earlier in the game, I was really uncertain on what to do, and used alot of time, at one point I managed to push back his attack with my pawns, it looked pretty good to me, but Im not sure, tell me what you think about that.