Rybka lost

[Uri]

Rybka (the strongest program) lost to GM Roman Dzindzichashvili with black but rybka didn't have the b7 pawn. Roman Dzindzichashvili had 3 connected passed pawns on the kingside and Rybka has 1 passed pawn on the queenside which couldn't advance without being taken by the rock.

You can watch the games here:

http://www.chessok.com/broadcast/live.html

[Jack Lad]

44...Ra5 was better and might have held the draw too.
[d] 8/p2R2pk/7p/r2p4/8/4P1P1/5P1P/6K1 w - - 15 45

[bob]

Rybka (the strongest program) lost to GM Roman Dzindzichashvili with black but rybka didn't have the b7 pawn. Roman Dzindzichashvili had 3 connected passed pawns on the kingside and Rybka has 1 passed pawn on the queenside which couldn't advance without being taken by the rock.

You can watch the games here:

http://www.chessok.com/broadcast/live.html

Roman is a good friend of mine, and a very difficult opponent for computers, because he has had too many discussions about computer weaknesses, which are _still_ there regardless of public opinion... Of course, he will often play the usual anti-computer stuff where many refuse to do so...

[AdminX]

Rybka (the strongest program) lost to GM Roman Dzindzichashvili with black but rybka didn't have the b7 pawn. Roman Dzindzichashvili had 3 connected passed pawns on the kingside and Rybka has 1 passed pawn on the queenside which couldn't advance without being taken by the rock.

You can watch the games here:

http://www.chessok.com/broadcast/live.html

Roman is a good friend of mine, and a very difficult opponent for computers, because he has had too many discussions about computer weaknesses, which are _still_ there regardless of public opinion... Of course, he will often play the usual anti-computer stuff where many refuse to do so...

Yes, what you say is true. I met Roman in Washington Square Park many many years ago when I lived in New York. Some would say he "Hustled Me", but I was just paying for my Chess Lessons.

[gerold]

Rybka (the strongest program) lost to GM Roman Dzindzichashvili with black but rybka didn't have the b7 pawn. Roman Dzindzichashvili had 3 connected passed pawns on the kingside and Rybka has 1 passed pawn on the queenside which couldn't advance without being taken by the rock.

You can watch the games here:

http://www.chessok.com/broadcast/live.html

Roman is a good friend of mine, and a very difficult opponent for computers, because he has had too many discussions about computer weaknesses, which are _still_ there regardless of public opinion... Of course, he will often play the usual anti-computer stuff where many refuse to do so...

Yes, what you say is true. I met Roman in Washington Square Park many many years ago when I lived in New York. Some would say he "Hustled Me", but I was just paying for my Chess Lessons.

Good games to keep in mind.
I have played a couple G.M.s in Calif. One the chess champion of
Calif. Games i will never forget.

[Uri]

Roman is a good friend of mine, and a very difficult opponent for computers, because he has had too many discussions about computer weaknesses, which are _still_ there regardless of public opinion... Of course, he will often play the usual anti-computer stuff where many refuse to do so...

Computers are good but they still don't match human positional understanding of chess. Computer weaknesses are in closed positions where they don't have many tactical chances to exploit. In closed positions knights are usually better than bishops. The main weakness of computers is that they "think" more in short-range tactical terms instead of long-range strategical or general terms.

[smirobth]

44...Ra5 was better and might have held the draw too.

Yes, 44...Ra5 was better and I believe would easily hold a draw. But even a few moves later in the game I think Rybka still could have drawn:
[d]8/6k1/R6p/6p1/6P1/p3P3/r4PKP/8 b - - 0 49
49...Kf7? just loses. But unless I am missing something, 49...Ra1 or 49...Kh7 I believe both can still hold the draw.

[JVMerlino]

Indeed. The one time I got to play a GM was truly unforgettable. GM Koltanowski came to play a simul with the Chessmaster team many years ago. My game was actually one of the longer ones, although of course I was lost before the game began.

In order to protect the innocent patzer that I am, I'll only post the ending position:

[d]6k1/6p1/1p6/7p/8/5P2/PP4PP/3K4 b - - 0 31

jm

[Jack Lad]

Yes, 44...Ra5 was better and I believe would easily hold a draw. But even a few moves later in the game I think Rybka still could have drawn:
[d]8/6k1/R6p/6p1/6P1/p3P3/r4PKP/8 b - - 0 49
49...Kf7? just loses. But unless I am missing something, 49...Ra1 or 49...Kh7 I believe both can still hold the draw.

Ra1 may still hold the draw but I am not so sure about Kh7.

I will need more time to analyse these properly though.

[Uri]

Computers are very good tactically but strategically they still have a long way to go. A computer will play moves that make no sense to a human but have an accurate tactical foundation. This means computers are weak in positions where there are no tactical chances to exploit like in closed positions.