It was a first round, I got a young guy rated 1531. I had White, Ruy Lopez, he played Berlin defense. I decided to play simple and after a6 took on c6. I knew right away that Bg4 was a mistake.

I liked my position the after the opening. Then he played 20… g5, I thought that it is not a good move and replied by h4. Computer approves it, but then recommends 22. Kf2 with the following Rh1, it looks logical to me after h4. I kind of felt being forced to play 24. Bxg5, but later regretted it. The thing is I thought that I can’t defend e4 pawn and didn’t like exf5, letting the bishop on the open. Ironically that was the best move, 24. exf5, because after 24… Qxf5 25. Nc3 e4 I had 26. Rxe6! cxd6 27. f4 Qg6 28. fxg5 hxg5 29. Bxg5 with +1.2. 25… Qxc2 was not better after 26. Rc1 Qg6 27. Ne4 Be7 28. Bxg5 Bxg5 29. Nxg5 hxg5 30. Qxe5.

These lines would allow me to play comfortably for a win instead of what happened in the game. Anyway I found a defensive plan associated with my rook placed on e4. Then I played Qg4 forcing him to choose between an unpleasant endgame and losing a pawn. First option was better, but he chose the second one. But just when I thought that I have a stable advantage he suddenly played 30… g4. I knew that I have to cover d2 square, but missed that after a queen check his rook can go to h1.

My mistake was that I thought only about defense. 32. Qe4 was serving the same defensive purpose, but also was taking g6 square under control. After 32… Qc1+ 33. Kf2 Rh1 the following 34. Qg6+ with the series of checks forced his king to a7 and then Qe3+ would force the queens exchange where I would have +2 advantage.

So 32. Qc3 gave up the win, but I still had a draw. The problem was I had less than a minute left. When he played 34… Qg1+ I had a choice between Kg3 and Ke2. Unfortunately I didn’t like Ke2, not seeing that he doesn’t have anything more than a perpetual and played Kg3. It was a losing move. After 35… Kf5 I realized that e4 is coming, also I suddenly saw that I have only 4 seconds left, so I have to move right away. My move was a blunder, while it was sinking into me, my flag fell.

After the game he said that 36. Re4 probably could save me, but 36… Rh7 was winning anyway.