This game was played at 90-30 against the Chessmaster character Trudy. It's a good example of me misjudging an attacking situation as much more crushing than it actually was. In actuality I have a strong advantage but nothing like a "mate in x". Also the ending of the game is a good example of something I have seen written about by strong players and that's the difficulty of switching gears particularly when you are on the offensive and need to switch to the defensive.
Trudy - Nathan
Analysis time: 0:43:33
Analysis time: 0:43:33
[...] 1.b3 ♘f6N
1...g6 2.♗b2 ♘f6 3.g3 ♗g7 4.♗g2 d6 5.d4 c5 6.d5 ...1/2-1/2, Adams Michael 2610 - Shirov Alexei 2710 , Hastings 1992 It (cat.14)
1...e5 2.♗b2 ♘c6 3.e3 d6 4.g3 f5 5.♗g2 ♘f6 6.f4 ...1-0, Ponomariov Ruslan 2704 - Pomes Marcet Juan 2371 , Albox 6/ 4/2005 It (open) (active)
1...d5 2.♗b2 ♗g4 3.g3 c6 4.♗g2 ♘d7 5.h3 ♗h5 6.♘f3 ...1/2-1/2, Adams Michael 2630 - Anand Viswanathan 2725 , Las Palmas 1993 It "Gran Canaria" (cat.16)
1...c5 2.♗b2 ♘c6 3.e3 d5 4.♗b5 ♗d7 5.♘f3 ♘f6 6.O-O ...0-1, Morozevich Alexander 2721 - Rashkovsky Nukhim N 2525 , Moscow 1992 Memorial M.Tal2.♗b2 g6 3.♘f3 ♗g7 4.c4 O-O 5.e3 d6 6.d4 ♘bd7 7.♘c3 e5 8.♗e2 ♖e8 9.O-O e4 10.♘g5?! I was actually prepared for this. Perhaps because it's the only agressive looking reply to f4.
10.♘d2!?10...♕e7 11.h3 a5 12.a3 c6 13.♕c2 b6 14.b4 ♗b7 15.b5 c5 +0.3310...h6 I'm looking forward to her knight being stuck on h3 already looking to play g5 as Houdini agrees in the variation to move 11 to complete the job. She can of course get the knight out, but it will take some shuffling of her pieces to do it. (10...♘f8 11.♕c2 ♕e7 -0.28) 11.♘xf7? I had looked at this but written off as a blunder and Houdini agrees. (11.♘h3!11...g5 12.♔h1 +0.01) 11...♔xf7 12.♘b5?! A second blunder, here of a tempo. I think the game up to this point gave me a false sense of security that I was well ahead of the computer and from here on out was starting to look for more directly winning lines. (12.f3!?12...♔g8 13.♕c2 -1.46) 12...a6 13.♘c3 c6 I was worried about the results of her playing d5 here and maybe plopping a knight there but decided it didn't really work out for her. 14.♗g4 ♘xg4 15.♕xg4 Here my big debate was between Nf6 with a double attack on the queen, or Qg5 hoping to trade queens since I'm ahead material. I ended up deciding on the Nf6 because I wanted to release the light squared bishop and I wanted to have the Nf6 so I could play d5 and it seems I have reinforced my pawn on e4 and with it a space advantage. 15...♘f6 16.♕e2 d5 17.cxd5 cxd5 18.♖ac1 ♗g4 Here's where I really started thinking in terms of an attack on her king. 19.♕d2 ♕d7 20.♗a3 ♗f3 Here is what they call "count the pieces" or "local superiority". I've got my queen, my bishop, and my knight all able to attack the kingside quickly. She's got a rook defending. It seems like she lacks defenders here, so it seems like an important condition for an attack is given. Of course the pawn that can slide into f3 to support the attack is another big help. I feel there should really be something here and am really trying to find it. 21.gxf3 exf3 22.♔h1 I hadn't considered this move though I had noticed that she had a tempo to spare here. 22...♕h3 23.♖g1 ♘g4 24.♖xg4 ♕xg4 I went over Smyslov-Stahlberg from round 4 of Zurich 53 today and there winning the exchange as the result of an attack on a king was considered sufficient reward and was winning. Maybe I should have been happy with that. Still, considering I was a piece for a pawn up, seems like I lost ground rather than gained it if the attack doesn't pan out. 25.♖g1 ♕h3?? At this point I am thinking I am still good to go and that all I have to do is get a rook onto the h-file and I'm won. Obviously, Houdini doesn't think so. Still, at this point if I play the way it wants me to I'm still 2.5 to the good.
25...♕f5!26.♖g3 g5 27.♗c5 ♖ac8 28.a4 ♗f8 29.h3 ♖e6 30.♕d1 ♖f6 31.b4 -2.4826.♕d3?
26.♘xd5!26...g5 27.♘c7 ♖ad8 28.♕c2 ♖c8 29.♕c4 ♔g6 30.♕d3 ♕f5 31.♕xf5 ♔xf5 +0.4226...♖ad8?? At this point I'm starting to realize that it might be a bit more work to wrap this up than I thought just a move ago, but I still see this as totally won for me, and just a question of getting a rook onto the h-file. I am just assuming that the computer is only left with futile shuffling of the pieces and that I can proceed totally unhindered in my designs. I believe I glanced at pieces the queen attacked but totally neglected to register that the rook on g1 is actually an active offensive pieces as well as defending against mate on g2. Interesting though that if I just play to trade off queens I still have a significant advantage according to Houdini.
26...♕f5!27.♕xf5 gxf5 28.♘xd5 ♖ad8 29.♘f4 ♖c8 30.♗c5 ♗f8 31.♗xf8 ♖xf8 32.h3 -1.5927.♕xg6 ♔g8 28.♕xg7#
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