There's not more frustrating than just after you made a bad move, you realize that you could ended the game quickly.
In this game, I played black and after some mistakes by both sides and some blunders we come to the position above after my 27...Bc2+, the white played 28.Kc1
After miss this chance, I blundered a lot and white equalized, so we come to this position with a mate in 2!
So, after I amost give a draw, we ended in the following position, with more opportunities missed!
The conclusion for me is:
I'm very noob, and need to learn and play more and more to get used to more patterns. Reviewing this game I was able to check and learn some better variations for the oppening, middle game and as shown here, endgame.
Hope this help someone or at least, have fun with the puzzles
The complete game follows: