A tactic went wrong early in the game, but I managed to recover my piece, and be just a pawn down.
But my opponent made some inaccuracies, and I recovered back the pawn.
I think I erred again, I should have gone Kf1-Ke2-Kd3, instead of Kg2--Kg3[tempo waste?]-f4-Kf3.
Now the resultant pawn ending was losing for me.
Now I spent many days calculating the lines with f3, h3, f4, h4, a3 many times. Everything was losing. If all the pawn moves are over, and it's my turn, I will be the one losing. Maybe I have to analyse this position again with an engine.
Then the thought of Kf4 came to my mind. I ran the line Kf4 Kd5 Ke3 c5 dxc5 Kxc5 Ke4 Kb4 quickly in my mind, and thought that I could have held, but I was wrong.
I was considering resigning here, but then changed my mind.
Black wastes 2 tempi which costs him the game.
Now I create a passed pawn.
Black never queened his pawn, but he would have lost quicker if he did.
The game went,
What I learnt:
- Do not resign early, your opponent may have not seen what you did.
- One instructive pawn endgame technique - creation of passed pawn.