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ANNOTATED GAME
Technological Brilliance
Rybka (Computer) (?) vs. Shredder (Computer) (?)
Annotated by: black_cat_hamlet (1531)
Chess opening: Sicilian (B97), Najdorf, Poisoned pawn variation
Rybka (Computer) (?) vs. Shredder (Computer) (?)
Annotated by: black_cat_hamlet (1531)
Chess opening: Sicilian (B97), Najdorf, Poisoned pawn variation
 Interactive |
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27... Qxf1+ |
The point of Qa1+ - Shredder sacs his queen for a rook and bishop to ease the pressure on his position | |||||||
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28. Kxf1 Rxf8+ 29. Rf2 |
This rook manoeuvre turns out to be pivotal in Rybka's game... | |||||||
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29... Nc6 |
Finally, with some room to breathe, Shredder attempts to get his queenside pieces into action at last... | |||||||
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30. Bh5 |
! But Rybka is far from done with him! The threat is 31.Rxf8+ Kxf8 then mate on either f7 or e8. Shredder could try 30...Bd7, but then comes 31.Rf7! Rxf7 32.Qxf7+ Kh8 33.Qxd7, leaving Rybka with a winning advantage. | |||||||
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30... Rxf2+ |
Instead, Shredder trades off, but there's no way he can avoid losing a piece - can you see how? | |||||||
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31. Kxf2 Ne5 |
Shredder drives away the queen and covers the g6 square [Rybka's new threat was 32.Qe8+ Kh7 Bg6#] | |||||||
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32. Qe8+ Kh7 33. Ke3 |
! Now do you see how Black loses his piece? The moves from now until move 36 are all forced... and Rybka must have analysed all this back at move 22. That means that Rybka managed to see 14 moves ahead, including all the variations possible. Only a computer or a strong grandmaster can do this in real-time chess [though in correspondence chess like on Gameknot, it may be possible that players like Ion and Freddy can do so as well] | |||||||
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33... b5 |
The bishop can't move to d7, so Shredder opts to move it to b7. | |||||||
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34. Kf4 |
! As the knight is still preventing Bg6#, it cannot move, and there are no pieces which can defend it in time! [note that 34.Kxe4?? is calamity for Rybka after 34...Bb7+!, and Rybka loses her queen | |||||||
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34... Bb7 |
Now Rybka's queen is forced off the h5-e8 diagonal, and the mating threat vanishes, but it's too late to avoid losing material... | |||||||
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35. Qe7 |
! Both the bishop and knight are threatened - Shredder can't save 'em both! | |||||||
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35... Bd5 |
Shredder chooses to preserve the stronger of his two pieces, while defending the two e-pawns that are soom to be attacked by Rybka's king... | |||||||
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36. Kxe5 |
From now on, it's simple clean-up work for Rybka - she simply has a much better position! Her king is centralised, whereas Shredder's is trapped in a corner, and she has a well placed queen and bishop. Of course, there may be ample opportunities for her to go wrong, and Shredder now relies wholly on his passed pawns from now until the game's end, but Rybka's a computer - she knows what she's doing :) | |||||||
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36... a5 |
Currently Shredder has three passed pawns on a5, e4 and e6 but the big problem for him is that the pawns are going to be tasty targets for Rybka's queen. | |||||||
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37. g4 e3 |
I was confused at first as to why Shredder didn't try using his rook to collect pawns, but the nature of Black's king means that Shredder's rook is confined to the back rank, and cannot go pawn hunting [a back row weakness this late in the game - unbelievable, isn't it?] Should the rook ever try to come off the back rank (for example, Rc8) then Rybka plays Qf7, and then Rxc2?? runs into Bg6+, then Qf8#. In short, Shredder can't do anything except pray for a miracle (and he can't even do that! He's a computer! :P) | |||||||
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38. g5 hxg5 |
This move is interesting - Either Shredder was worried about 39.g6 or 39.gxh6 Kxh6 40.Qf7. Though both moves do put increased pressure on his position, I can't find any mating nets that Rybka could exploit. As it turns out, this move actually loses a pawn - the pawn on e3, to be exact! | |||||||
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39. Qxg5 Kg8 |
His situation is bleak, but I feel that Shredder should at least try to push his passed pawns - it's the only thing going for him! | |||||||
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40. Qxe3 Rf8 41. Be2 |
Attacks the b5 pawn... | |||||||
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41... b4 |
so Shredder advances it | |||||||
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42. Bd3 Rf3 |
Well, there's no real harm in trying, is there? Of course, Rybka needs to move her queen... but take note of where the queen moves... ;) | |||||||
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