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Shredder (Computer) vs The King (Computer)
6th International CSVN Tournament (2006), Leiden NED, rd 8, May-07
Sicilian Defense: Kan. Polugaevsky Variation (B42)  ·  1-0



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Kibitzer's Corner
Aug-02-06  whatthefat: Shredder's attack here, starting with 17.f6, is rather unbelievable. In fact, I wonder whether it should actually lead to a draw. Of particular interest is the question of which side thought it was better at each point. In playing 17.f6 was Shredder looking to force a draw, or did it realy think it was winning as a result? Fritz rates the alternative 17.Be4 at close to equality, so both possibilities are plausible.

The move that really stands out (and suggests to me that Shredder may have thought it had found a winning line), is 22.Nd4. At first glance, one asks 'what in the name of corpulence is this?!'. White has a draw in hand, and he plays this? The point of course is 22...exd4?? 23.Rf5 . Chessmaster's reply 22...Bc8 seems correct, and the only real alternative to 23.Qe4+ is 23.Nf5 Bxf5,

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when 24.Qxf5+ should draw. Alternatively, 24.Rxf5? Nf4! 25.Rf1 Ng6! 26.Rxf7+ Rxf7 27.Rxf7+ Kh6 gives the following wild position:

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where black has incredibly survived (Fritz confirms it!), with an extra piece in the ending. A draw is not impossible, but black should be looking to win.

Returning to the game after 23.Qe4+, black's reply 24...Qb6 seems to ensure that white comes away with a slight advantage - which Shredder went on to convert. I looked at the possibility of improving with 27...Bh7, but after 28.Qg3+ Kh8 29.Qh4 Qa7 30.Rd3! Rg8 21.Rh6:

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black is in a world of pain.

All of this analysis led me to the conclusion that black's only real chance to improve lies in 23...f5.

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This would appear to force 24.Qxd5 Ra7 and now 25.Ne6:

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gives an unclear position (to me anyway!), though black seems to be holding on okay. Black can consider 25...Qb6+ for example.

Aug-03-06  CapablancaFan: The "King" tried to draw it with a 3 move repetition (32. Nxe3 Ke7 33.Nd5+ Kf8 34.Ne3 Ke7 35.Nd5+ Kf8 36.c3!) and Shredder dosen't allow it. Lol. The King plays a horrible endgame and with Shredder having passed pawns on opposite sides of the board is just too much.
Aug-03-06  whatthefat: I should note that in my first diagram, black's knight is missing from d5. i.e., it should be

click for larger view

Aug-22-06  RandomVisitor: 23...f5
24.Qxd5 (24.Nxf5 Bxf5 25.Rxf5 Rxf5 26.Qxf5+ and White has at least a perpetual check)

25.Ne6 Qb6+
26.Kh1 Rf6
27.Ng5+ Kg7 -0.30

May-25-07  scholes: after sacrificing a piece shredder's knight remains enprise for 7 moves!

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