Adhiban said, 'I probably mixed up something in my preparation, I'm not sure now if 15...g4 is the move.' Jorden van Foreest had also prepared this line: 9...Ng6 is the top move of the computer, but it has hardly ever been played. Anand-Giri in last year's Candidates went 9...c6. The engine gave 0.00 in this line all the time, but still I decided to try it.'
The black attack 'looked like a strange King's Indian', Van Foreest said. There are people who say the entire King's Indian is incorrect - in any case, it looks as if this line of today is.
We called White's 20.f4 a practical move. Van Foreest had of course considered 20.exd6, 'but I wasn't sure there. 20...Qg5 looks dangerous'.
Here are some sample lines.
The players mentioned 21.dxc7 and now 21...Ke7! 22.Rd8 Qg3+ 23.Kg1 h3 24.Qd2 h2+ 25.Kh1 Qe5 26.Qe1 Ng3+ 27.Qxg3 Qxg3 28.Rxh8 is still good for White, but it's very understandable that Jorden wanted to avoid such lines.
21.d7+ looks safer but is not so clear either: 21...Bxd7 22.Rxd7 Qg3+ 23.Kg1 h3 24.Bxf7+ Kf8 25.Qd2 Nf6! (now 25...h2+ 26.Kh1 Qe5 is ridiculous due to 27.Bxh5) 26.Rd5! (if 26.Rd4 Kxf7 followed by ...hxg2 and ...Rag8 gives Black a lot of play) 26...Nxd5
27.Bxd5 Rd8 28.Nc2 (the white queen can't move) 28...c6 29.Nd4 cxd5 30.Ne6+ or 29...Ke8 30.Nf5 Qxg2+ 31.Qxg2 hxg2 32.Bxc6+ bxc6 33. Kxg2, both with just a small edge for White.
Of course the endgame with the extra pawn was better. Adhiban managed to drum up counterplay, but it wasn't enough to save the game.