FSR: This game is from a 16-board clock simul that GM Avetik Grigoryan gave for supporters of Ben Johnson 's <The Perpetual Chess Podcast>. He had 120 minutes with a 10-second increment, while his opponents had 30 minutes with a 10-second increment. He scored +13 =1 -2. A few comments:
I had never seen 6.b4!? It turns out that it has been played four times before, and is apparently recommended on Grigoryan's <ChessMood> site. I didn't try to refute it.
After 14...Qe5, I was reasonably content. My queen is nicely centralized, and if he tries some weird mating attack with h4, I always have Qa1+ forcing the trade of queens.
His 15.Qg3?? was a gross blunder, overlooking the queen check and dropping a rook.
17.c3! was a nice desperation move, threatening to trap my queen with Rb1. It's surprisingly hard to extricate it, e.g. 17...Qa1 18.Bb1! keeps it bottled up, or 17...Qc1 18.Qd6! (taking away the a3 square) again threatens Rb1.
Dissatisfied with the alternatives, I found the stunning 17...f5!!, which exploits the fact that the White queen has very few squares available from which it can keep the black queen trapped. White has to go ahead with 18.Rb1. Not 18.exf5?? Re8+ 19.Kf3 Qd1+ 20.Kf4 Qxd2+ 0-1.
The point is 18.Rb1 f4!, when the white queen has no way to keep its black counterpart locked in, and has nothing other than 19.Qh3 d5 20.Rxh1 Bxh3 21.gxh3, leaving Black up an exchange in a completely won ending. I played very exactly to end the game five moves later. <OhioChessFan> noted that there can't be many games where Black's last two moves are ...f3+ and ...f4+.
The video of the simul is at https://www.youtube.com/watch?v=TaN...
A few high points (by my reckoning at least):
59:45 - Avetik decides on Qg3??
1:03:35 - seeing Qa1+ on the board, he howls in agony. "Ben, look what I did!"
1:04:45 Ben observes, "Krakatoa, 2300 blitz, so it is a pretty strong player that you blundered against at least."
1:22:43 - "f4. So maybe he calculated this one, yeah?"
1:26:20 - "d5. That was great calculation by Krakatoa."
1:49:40 I play ...f4+!, winning a piece, and he resigns. "You converted the advantage very, very, very cool."
2:10:12 With 46 minutes on his clock, Avetik blunders a rook in the last game, turning a win into a draw.