Carl's Jr. g/20 Tournament on 2/26/2014

Here are some interesting positions that I had tonight that I want to share. The first is from Round 1.

I was White. I had just played 18. Qc3-c2. My opponent surprised me with 18...Bxa2+ (the idea is if Kxa2 then Nb4+ wins the queen), but after 19. Ka1, surprisingly, Black will lose material.

The second position is from Round 3.

I was White. Black has just played 19...Kg8. I won on the spot with 20. Qxa8+! Back rank mate. The third position is from Round 4.

I was Black. Unfortunately, my opponent blundered here with 1. Bg4? His idea was 1...Nxg4 2. fxg4 Qxg4 3. Qxe3!! and wins. But instead, I played 2...Be4+! and after 3. Kg1, I played 3...Rg3+!!. The point is  4. hxg3 Qh1#.