|Jan-26-11|| ||GrahamClayton: A very complicated game. Interesting sacrifice by Palciauskas with 13.f5!?:|
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After 13...ef5, I presume that Palciauskas would have played 14.d5, attacking the Black Queen, and then 15.gf5, opening the g-file?
|Aug-05-11|| ||qqdos: <GrahamClayton> All this stuff is theory upto 16.Rg3 where Black diverged with 16...Bf8 and was hit with 17.Nh6+! See the 1996 (Akopian) Chess Informant - Monograph B89, note 527. The answer to your question after 13...exf5?, is 14.gxf5 (...Bd7 15.Nd5 Qd8 16.Qh5 Kh8 17.Rxg7 Kxg7 18.f6 was played in Sokolov vs Grigorian, USSR 1978) ...Nxb3 15.axb3 Qa5 16.Kb1. In 2006 Dennis Monokroussos analysed this complex game in 2 parts. Can anyone provide a link or other access to his commentary?|
|Aug-05-11|| ||computer chess guy: The h6+, g4, f6+ maneuver is very impressive. This required deep calculation. I am not sure though what White intended if Black had played 19. .. bxc3. Houdini seems to think this is = after a fairly deep search.|
|Aug-13-11|| ||qqdos: <guy> Sorry to be so long in getting back to you. The answer, after 19...bxc3, is 20.Nxh7!! with wonderful complications. Not 20...Kxh7?? 21.Qh5+ and #6! If 20....cxb2+ 21.Kb1 g6 22.Rh3 (or 22.Nf6 Bh6 23.Rh3 Kg7 24.Qf3 ) leading to advantage for White. Ditto, if 20...g6 21.Rh3 Kg7 22.Nf6 Be7 23.Rh7+ Kf8 24.Bxc5 . Black could try 20...f5, but I don't think he can escape alive. There are several other lines, which fail to improve for Black. Cheers!|
|Sep-13-11|| ||computer chess guy: What about 19. .. h8, and if 20. h5, .. g6?. I do not then see a win for White.|
|Nov-13-11|| ||DrMAL: Here is Opening Explorer sac 13.Nf5 has not normally been played but it is by far best move. Here is eval, character of line tells much more about game than score does.|
Houdini_20_x64: 26/71 47:51 29,002,998,721
0.00 13.Nf5 b5 14.Nxe7+ Qxe7 15.Kb1 Bb7 16.f3
-0.01 13.g5 Nxd4 14.Bxd4 b5 15.Kb1 b4 16.Na4
-0.01 13.Kb1 Nxd4 14.Bxd4 b5 15.f4 Bd7 16.e5
-0.01 13.f4 b5 14.Kb1 Nxd4 15.Bxd4 Bd7 16.e5
-0.17 13.Nxc6 Qxc6 14.Kb1 Nxb3 15.cxb3 b5 16.f3
I was under the impression that Nf5 sac was not usual part of opening, thanx to <qqdos> I now realize that this is illusion from historical play. 13.g5 was most common historical move, it is OK move but quite poor compared with 13.Nf5! sac. Lines with Nf5 are sharp, this is what makes attack dangerous weapon, black in particular must play very accurately or quickly lose. Depending on subvariation, accepting sac may be better as in original game Velimirovic vs Sofrevski, 1965 see commentary there.
Accepting sac in this position is already a mistake here is quick eval if 13...exf5?! is played, but it is easy to see that after 14.gxf5 lines are opened against black king, dubious for black to survive.
Houdini_20_x64: 23/76 06:08 3,834,957,049
+0.65 14.gxf5 Nxb3+ 15.axb3 Qa5 16.Kb1 Kh8
-0.17 14.Nd5 Nxb3+ 15.axb3 Qa5 16.gxf5 Qa1+