Neat position: Rybka claims win but it seems a draw

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CRoberson
Posts: 2094
Joined: Mon Mar 13, 2006 2:31 am
Location: North Carolina, USA

Neat position: Rybka claims win but it seems a draw

Post by CRoberson »

This position came form a USCL match between Carlito Agner and Shaun Smith:

[d] 8/8/5k2/5p2/8/4R1p1/3Kp2P/3b4 w - - 0 70

Rybka claims Rxg3 and a score of greater than +3. At first Rybka shows a drawish score. It changes it mind around 27 ply and keeps it
that way up to 39 ply.

I don't see it. Everytime I look though the variations, Black can draw.
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adieguez

Re: Neat position: Rybka claims win but it seems a draw

Post by adieguez »

No idea why but I analyzed something almost like this previously. This only adds one trick but it is still a draw. Would be surprised if there is some super magic trick and it is not.
CRoberson wrote:This position came form a USCL match between Carlito Agner and Shaun Smith:

[d] 8/8/5k2/5p2/8/4R1p1/3Kp2P/3b4 w - - 0 70

Rybka claims Rxg3 and a score of greater than +3. At first Rybka shows a drawish score. It changes it mind around 27 ply and keeps it
that way up to 39 ply.

I don't see it. Everytime I look though the variations, Black can draw.
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adieguez

Re: Neat position: Rybka claims win but it seems a draw

Post by adieguez »

being more specific, black is safe if can go to the corner right? even with the h pawn.

It seems after Rxg3, f4, Rg1, f3, Ke1(or Ke3) Bb3 then white can do nothing without giving up the g file, letting black king go to the corner. And that's all there is to it.. after that variation the amyan I have ends up showing 0.00 too.
adieguez wrote:No idea why but I analyzed something almost like this previously. This only adds one trick but it is still a draw. Would be surprised if there is some super magic trick and it is not.
CRoberson wrote:This position came form a USCL match between Carlito Agner and Shaun Smith:

[d] 8/8/5k2/5p2/8/4R1p1/3Kp2P/3b4 w - - 0 70

Rybka claims Rxg3 and a score of greater than +3. At first Rybka shows a drawish score. It changes it mind around 27 ply and keeps it
that way up to 39 ply.

I don't see it. Everytime I look though the variations, Black can draw.
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bob
Posts: 20943
Joined: Mon Feb 27, 2006 7:30 pm
Location: Birmingham, AL

Re: Neat position: Rybka claims win but it seems a draw

Post by bob »

CRoberson wrote:This position came form a USCL match between Carlito Agner and Shaun Smith:

[d] 8/8/5k2/5p2/8/4R1p1/3Kp2P/3b4 w - - 0 70

Rybka claims Rxg3 and a score of greater than +3. At first Rybka shows a drawish score. It changes it mind around 27 ply and keeps it
that way up to 39 ply.

I don't see it. Everytime I look though the variations, Black can draw.
Interestingly, Crafty says the same thing (score not as big) but it starts to jump at depth 27, 28, etc. Not quite sure why but I am looking at it.
Top
adieguez

Re: Neat position: Rybka claims win but it seems a draw

Post by adieguez »

Nevermind I got it all wrong. h pawn wins. not sure if always or when.
adieguez wrote:being more specific, black is safe if can go to the corner right? even with the h pawn.

It seems after Rxg3, f4, Rg1, f3, Ke1(or Ke3) Bb3 then white can do nothing without giving up the g file, letting black king go to the corner. And that's all there is to it.. after that variation the amyan I have ends up showing 0.00 too.
adieguez wrote:No idea why but I analyzed something almost like this previously. This only adds one trick but it is still a draw. Would be surprised if there is some super magic trick and it is not.
CRoberson wrote:This position came form a USCL match between Carlito Agner and Shaun Smith:

[d] 8/8/5k2/5p2/8/4R1p1/3Kp2P/3b4 w - - 0 70

Rybka claims Rxg3 and a score of greater than +3. At first Rybka shows a drawish score. It changes it mind around 27 ply and keeps it
that way up to 39 ply.

I don't see it. Everytime I look though the variations, Black can draw.
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Dann Corbit
Posts: 12792
Joined: Wed Mar 08, 2006 8:57 pm
Location: Redmond, WA USA

Re: Neat position: Rybka claims win but it seems a draw

Post by Dann Corbit »

[d]8/8/5k2/5p2/8/4R1p1/3Kp2P/3b4 w - - acd 30; acn 39414946; acs 580; bm Rxg3; ce 342; pv Rxg3 Ke5 Ke1 f4 Rg5+ Kf6 Rg1 f3 h4 Bc2 Kf2 Be4 h5 Kf7 h6 Kf8 Rg7 Bf5 Rb7 Kg8 Re7 Bd3 Kxf3 Kf8 Re3 Bb5 Kf2 Kg8 Re7 Bd3 Rg7+;

Code: Select all

Analysis from C:\test\MAYBE.EPD   
10/29/2009 5:37:26 PM Level: 600 Seconds
Analyzing engine: Rybka 3

1)                      
    Avoid move: 
    Best move (Rybka 3): Re3xg3
    Not found in: 10:00
      2	00:00	         118	7.552	+0.41	h2xg3
      3	00:00	         151	9.664	+0.38	h2xg3
      4	00:00	         622	39.808	+0.30	h2xg3
      5	00:00	         841	53.824	+0.14	h2xg3 Kf6g5
      6	00:00	       2.473	158.272	+0.12	h2xg3 Kf6g5 Re3e7 f5f4
      7	00:00	       4.702	150.464	+0.09	h2xg3 Kf6g5 Re3e7 f5f4 Re7g7+ Kg5f6
      8	00:00	       7.272	118.198	+0.09	h2xg3 Kf6g5 Re3e7 f5f4 Re7g7+ Kg5f6 Rg7g8 f4xg3 Kd2e1
      9	00:00	       7.284	118.393	+0.09	h2xg3 Kf6g5 Re3e7 f5f4 Re7g7+ Kg5f6 Rg7g8 f4xg3 Kd2e1
     10	00:00	      11.391	67.816	+0.07	h2xg3 Kf6g5 Re3e8 Kg5g4 Re8f8 Kg4xg3 Rf8xf5 Bd1c2 Rf5e5 Bc2d1
     11	00:00	      11.442	68.119	+0.07	h2xg3 Kf6g5 Re3e8 Kg5g4 Re8f8 Kg4xg3 Rf8xf5 Bd1c2 Rf5e5 Bc2d1
     12	00:00	      12.444	54.224	+0.06	h2xg3 Kf6g5 Re3e8 Kg5g4 Re8f8 Kg4xg3 Rf8xf5 Bd1c2 Rf5e5 Bc2d1 Re5e6 Kg3f4 Re6e8
     13	00:00	      12.523	48.208	+0.06	h2xg3 Kf6g5 Re3e8 Kg5g4 Re8f8 Kg4xg3 Rf8xf5 Bd1c2 Rf5e5 Bc2d1 Re5e6 Kg3f4 Re6e8
     14	00:00	      14.139	48.748	+0.06	h2xg3 Kf6g5 Re3e8 Kg5g4 Re8f8 Kg4xg3 Rf8xf5 Bd1c2 Rf5e5 Bc2d1 Re5e6 Kg3f4 Re6e8
     14	00:01	      45.806	56.648	+0.17	Re3xg3 f5f4 Rg3g1 Kf6f5 Kd2e1 Kf5e4 Rg1g8 f4f3 Ke1f2 Ke4f4 Rg8g3 Kf4e5 h2h3
     15	00:01	      45.819	56.665	+0.17	Re3xg3 f5f4 Rg3g1 Kf6f5 Kd2e1 Kf5e4 Rg1g8 f4f3 Ke1f2 Ke4f4 Rg8g3 Kf4e5 h2h3
     16	00:01	      46.567	55.511	+0.17	Re3xg3 f5f4 Rg3g1 Kf6f5 Kd2e1 Kf5e4 Rg1g8 f4f3 Ke1f2 Ke4f4 Rg8g3 Kf4e5 h2h3
     17	00:01	      48.239	51.029	+0.17	Re3xg3 f5f4 Rg3g1 Kf6f5 Kd2e1 Kf5e4 Rg1g8 f4f3 Ke1f2 Ke4f4 Rg8g3 Kf4e5 h2h3
     18+	00:02	      66.862	36.554	+0.37	Re3xg3
     18+	00:02	      69.581	35.116	+0.57	Re3xg3
     18+	00:02	      89.601	37.206	+0.97	Re3xg3
     18	00:03	     122.710	36.274	+0.97	Re3xg3 f5f4 Rg3g1 Kf6e5 Kd2e1 Ke5d4 Ke1f2 f4f3 h2h4
     19+	00:05	     191.156	35.339	+1.17	Re3xg3
     19+	00:06	     246.042	38.725	+1.37	Re3xg3
     19+	00:08	     349.170	42.918	+1.77	Re3xg3 f5f4 Rg3g1 Kf6e5 Kd2e1 Ke5d4 Ke1f2 f4f3 Rg1e1 Kd4e4 h2h4 Ke4f4 Re1g1
     19	00:08	     349.176	42.918	+1.77	Re3xg3 f5f4 Rg3g1 Kf6e5 Kd2e1 Ke5d4 Ke1f2 f4f3 Rg1e1 Kd4e4 h2h4 Ke4f4 Re1g1
     20	00:08	     349.189	42.920	+1.77	Re3xg3 f5f4 Rg3g1 Kf6e5 Kd2e1 Ke5d4 Ke1f2 f4f3 Rg1e1 Kd4e4 h2h4 Ke4f4 Re1g1
     21	00:09	     378.541	40.798	+1.77	Re3xg3 f5f4 Rg3g1 Kf6e5 Kd2e1 Ke5d4 Ke1f2 f4f3 Rg1e1 Kd4e4 h2h4 Ke4f4 Re1g1
     22	00:11	     470.574	42.022	+1.77	Re3xg3 f5f4 Rg3g1 Kf6e5 Kd2e1 Ke5d4 Ke1f2 f4f3 Rg1e1 Kd4e4 h2h4 Ke4f4 Re1g1
     23	00:15	     668.691	43.848	+1.77	Re3xg3 f5f4 Rg3g1 Kf6e5 Kd2e1 Ke5d4 Ke1f2 f4f3 Rg1e1 Kd4e4 h2h4 Ke4f4 Re1g1
     24+	00:29	   1.527.283	54.721	+1.97	Re3xg3
     24	00:41	   2.105.698	52.674	+1.97	Re3xg3 Kf6e5 Kd2e1 Ke5f4 Rg3g7 Bd1a4 h2h4 Ba4e8 Ke1xe2 Be8b5+ Ke2d2 Bb5e8 Kd2d3 Be8h5 Kd3d4 Bh5d1 Rg7h7 Kf4g4 h4h5 f5f4 h5h6 Kg4g5 Kd4d3 Bd1h5 Rh7h8
     25	00:46	   2.430.782	54.086	+1.97	Re3xg3 Kf6e5 Kd2e1 Ke5f4 Rg3g7 Bd1a4 h2h4 Ba4e8 Ke1xe2 Be8b5+ Ke2d2 Bb5e8 Kd2d3 Be8h5 Kd3d4 Bh5d1 Rg7h7 Kf4g4 h4h5 f5f4 h5h6 Kg4g5 Kd4d3 Bd1h5 Rh7h8 Bh5g6+ Kd3d2 Bg6e4 Kd2e1
     26	00:55	   3.071.298	56.820	+1.97	Re3xg3 Kf6e5 Kd2e1 Ke5f4 Rg3g7 Bd1a4 h2h4 Ba4e8 Ke1xe2 Be8b5+ Ke2d2 Bb5e8 Kd2d3 Be8h5 Kd3d4 Bh5d1 Rg7h7 Kf4g4 h4h5 f5f4 h5h6 Kg4g5 Kd4d3 Bd1h5 Rh7h8 Bh5g6+ Kd3d2 Bg6e4 Kd2e1
     27	01:05	   3.687.952	57.650	+1.97	Re3xg3 Kf6e5 Kd2e1 Ke5f4 Rg3g7 Bd1a4 h2h4 Ba4e8 Ke1xe2 Be8b5+ Ke2d2 Bb5e8 Kd2d3 Be8h5 Kd3d4 Bh5d1 Rg7h7 Kf4g4 h4h5 f5f4 h5h6 Kg4g5 Kd4d3 Bd1h5 Rh7h8 Bh5g6+ Kd3d2 Bg6e4 Kd2e1
     28	01:20	   4.464.324	56.867	+1.97	Re3xg3 Kf6e5 Kd2e1 Ke5f4 Rg3g7 Bd1a4 h2h4 Ba4e8 Ke1xe2 Be8b5+ Ke2d2 Bb5e8 Kd2d3 Be8h5 Kd3d4 Bh5d1 Rg7h7 Kf4g4 h4h5 f5f4 h5h6 Kg4g5 Kd4d3 Bd1h5 Rh7h8 Bh5g6+ Kd3d2 Bg6e4 Kd2e1
     29+	02:53	   8.282.690	48.997	+2.17	Re3xg3
     29+	03:44	  12.415.664	56.776	+2.37	Re3xg3
     29+	05:40	  22.249.714	67.049	+2.77	Re3xg3
     29	08:33	  33.721.966	67.247	+3.42	Re3xg3 Kf6e5 Kd2e1 f5f4 Rg3g5+ Ke5f6 Rg5g1 f4f3 h2h4 Bd1c2 Ke1f2 Bc2e4 h4h5 Kf6f7 h5h6 Kf7f8 Rg1g7 Be4f5 Rg7b7 Kf8g8 Rb7e7 Bf5d3 Kf2xf3 Kg8f8 Re7e3 Bd3b5 Kf3f2 Kf8g8 Re3e7 Bb5d3 Re7g7+
     30	09:40	  39.414.946	69.554	+3.42	Re3xg3 Kf6e5 Kd2e1 f5f4 Rg3g5+ Ke5f6 Rg5g1 f4f3 h2h4 Bd1c2 Ke1f2 Bc2e4 h4h5 Kf6f7 h5h6 Kf7f8 Rg1g7 Be4f5 Rg7b7 Kf8g8 Rb7e7 Bf5d3 Kf2xf3 Kg8f8 Re7e3 Bd3b5 Kf3f2 Kf8g8 Re3e7 Bb5d3 Re7g7+
   10/29/2009 5:47:47 PM, Time for this analysis: 00:10:00, Rated time: 10:00

0 of 1 matching moves
10/29/2009 5:47:48 PM, Total time: 12:10:21 AM
Rated time: 10:00 = 600 Seconds
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User avatar
Thomas Mayer
Posts: 385
Joined: Thu Mar 09, 2006 6:45 pm
Location: Nellmersbach, Germany

Re: Neat position: Rybka claims win but it seems a draw

Post by Thomas Mayer »

Well, I analyzed a bit down with Quark, concentrating on a line like
Rxg3 f4 Rg1 Kf5

it seems that in this line black will always lose the f-pawn. Anyway, I wonder whether the resulting 6-men is still a draw. Can anyone try that out with a full set of 6-men ?

Greets, Thomas
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adieguez

Re: Neat position: Rybka claims win but it seems a draw

Post by adieguez »

Hi, that's a draw isn't, maybe it's the power of the dark side you were talking about.
Dann Corbit wrote:[d]8/8/5k2/5p2/8/4R1p1/3Kp2P/3b4 w - - acd 30; acn 39414946; acs 580; bm Rxg3; ce 342; pv Rxg3 Ke5 Ke1 f4 Rg5+ Kf6 Rg1 f3 h4 Bc2 Kf2 Be4 h5 Kf7 h6 Kf8 Rg7 Bf5 Rb7 Kg8 Re7 Bd3 Kxf3 Kf8 Re3 Bb5 Kf2 Kg8 Re7 Bd3 Rg7+;

Code: Select all

Analysis from C:\test\MAYBE.EPD   
10/29/2009 5:37:26 PM Level: 600 Seconds
Analyzing engine: Rybka 3

1)                      
    Avoid move: 
    Best move (Rybka 3): Re3xg3
    Not found in: 10:00
      2	00:00	         118	7.552	+0.41	h2xg3
      3	00:00	         151	9.664	+0.38	h2xg3
      4	00:00	         622	39.808	+0.30	h2xg3
      5	00:00	         841	53.824	+0.14	h2xg3 Kf6g5
      6	00:00	       2.473	158.272	+0.12	h2xg3 Kf6g5 Re3e7 f5f4
      7	00:00	       4.702	150.464	+0.09	h2xg3 Kf6g5 Re3e7 f5f4 Re7g7+ Kg5f6
      8	00:00	       7.272	118.198	+0.09	h2xg3 Kf6g5 Re3e7 f5f4 Re7g7+ Kg5f6 Rg7g8 f4xg3 Kd2e1
      9	00:00	       7.284	118.393	+0.09	h2xg3 Kf6g5 Re3e7 f5f4 Re7g7+ Kg5f6 Rg7g8 f4xg3 Kd2e1
     10	00:00	      11.391	67.816	+0.07	h2xg3 Kf6g5 Re3e8 Kg5g4 Re8f8 Kg4xg3 Rf8xf5 Bd1c2 Rf5e5 Bc2d1
     11	00:00	      11.442	68.119	+0.07	h2xg3 Kf6g5 Re3e8 Kg5g4 Re8f8 Kg4xg3 Rf8xf5 Bd1c2 Rf5e5 Bc2d1
     12	00:00	      12.444	54.224	+0.06	h2xg3 Kf6g5 Re3e8 Kg5g4 Re8f8 Kg4xg3 Rf8xf5 Bd1c2 Rf5e5 Bc2d1 Re5e6 Kg3f4 Re6e8
     13	00:00	      12.523	48.208	+0.06	h2xg3 Kf6g5 Re3e8 Kg5g4 Re8f8 Kg4xg3 Rf8xf5 Bd1c2 Rf5e5 Bc2d1 Re5e6 Kg3f4 Re6e8
     14	00:00	      14.139	48.748	+0.06	h2xg3 Kf6g5 Re3e8 Kg5g4 Re8f8 Kg4xg3 Rf8xf5 Bd1c2 Rf5e5 Bc2d1 Re5e6 Kg3f4 Re6e8
     14	00:01	      45.806	56.648	+0.17	Re3xg3 f5f4 Rg3g1 Kf6f5 Kd2e1 Kf5e4 Rg1g8 f4f3 Ke1f2 Ke4f4 Rg8g3 Kf4e5 h2h3
     15	00:01	      45.819	56.665	+0.17	Re3xg3 f5f4 Rg3g1 Kf6f5 Kd2e1 Kf5e4 Rg1g8 f4f3 Ke1f2 Ke4f4 Rg8g3 Kf4e5 h2h3
     16	00:01	      46.567	55.511	+0.17	Re3xg3 f5f4 Rg3g1 Kf6f5 Kd2e1 Kf5e4 Rg1g8 f4f3 Ke1f2 Ke4f4 Rg8g3 Kf4e5 h2h3
     17	00:01	      48.239	51.029	+0.17	Re3xg3 f5f4 Rg3g1 Kf6f5 Kd2e1 Kf5e4 Rg1g8 f4f3 Ke1f2 Ke4f4 Rg8g3 Kf4e5 h2h3
     18+	00:02	      66.862	36.554	+0.37	Re3xg3
     18+	00:02	      69.581	35.116	+0.57	Re3xg3
     18+	00:02	      89.601	37.206	+0.97	Re3xg3
     18	00:03	     122.710	36.274	+0.97	Re3xg3 f5f4 Rg3g1 Kf6e5 Kd2e1 Ke5d4 Ke1f2 f4f3 h2h4
     19+	00:05	     191.156	35.339	+1.17	Re3xg3
     19+	00:06	     246.042	38.725	+1.37	Re3xg3
     19+	00:08	     349.170	42.918	+1.77	Re3xg3 f5f4 Rg3g1 Kf6e5 Kd2e1 Ke5d4 Ke1f2 f4f3 Rg1e1 Kd4e4 h2h4 Ke4f4 Re1g1
     19	00:08	     349.176	42.918	+1.77	Re3xg3 f5f4 Rg3g1 Kf6e5 Kd2e1 Ke5d4 Ke1f2 f4f3 Rg1e1 Kd4e4 h2h4 Ke4f4 Re1g1
     20	00:08	     349.189	42.920	+1.77	Re3xg3 f5f4 Rg3g1 Kf6e5 Kd2e1 Ke5d4 Ke1f2 f4f3 Rg1e1 Kd4e4 h2h4 Ke4f4 Re1g1
     21	00:09	     378.541	40.798	+1.77	Re3xg3 f5f4 Rg3g1 Kf6e5 Kd2e1 Ke5d4 Ke1f2 f4f3 Rg1e1 Kd4e4 h2h4 Ke4f4 Re1g1
     22	00:11	     470.574	42.022	+1.77	Re3xg3 f5f4 Rg3g1 Kf6e5 Kd2e1 Ke5d4 Ke1f2 f4f3 Rg1e1 Kd4e4 h2h4 Ke4f4 Re1g1
     23	00:15	     668.691	43.848	+1.77	Re3xg3 f5f4 Rg3g1 Kf6e5 Kd2e1 Ke5d4 Ke1f2 f4f3 Rg1e1 Kd4e4 h2h4 Ke4f4 Re1g1
     24+	00:29	   1.527.283	54.721	+1.97	Re3xg3
     24	00:41	   2.105.698	52.674	+1.97	Re3xg3 Kf6e5 Kd2e1 Ke5f4 Rg3g7 Bd1a4 h2h4 Ba4e8 Ke1xe2 Be8b5+ Ke2d2 Bb5e8 Kd2d3 Be8h5 Kd3d4 Bh5d1 Rg7h7 Kf4g4 h4h5 f5f4 h5h6 Kg4g5 Kd4d3 Bd1h5 Rh7h8
     25	00:46	   2.430.782	54.086	+1.97	Re3xg3 Kf6e5 Kd2e1 Ke5f4 Rg3g7 Bd1a4 h2h4 Ba4e8 Ke1xe2 Be8b5+ Ke2d2 Bb5e8 Kd2d3 Be8h5 Kd3d4 Bh5d1 Rg7h7 Kf4g4 h4h5 f5f4 h5h6 Kg4g5 Kd4d3 Bd1h5 Rh7h8 Bh5g6+ Kd3d2 Bg6e4 Kd2e1
     26	00:55	   3.071.298	56.820	+1.97	Re3xg3 Kf6e5 Kd2e1 Ke5f4 Rg3g7 Bd1a4 h2h4 Ba4e8 Ke1xe2 Be8b5+ Ke2d2 Bb5e8 Kd2d3 Be8h5 Kd3d4 Bh5d1 Rg7h7 Kf4g4 h4h5 f5f4 h5h6 Kg4g5 Kd4d3 Bd1h5 Rh7h8 Bh5g6+ Kd3d2 Bg6e4 Kd2e1
     27	01:05	   3.687.952	57.650	+1.97	Re3xg3 Kf6e5 Kd2e1 Ke5f4 Rg3g7 Bd1a4 h2h4 Ba4e8 Ke1xe2 Be8b5+ Ke2d2 Bb5e8 Kd2d3 Be8h5 Kd3d4 Bh5d1 Rg7h7 Kf4g4 h4h5 f5f4 h5h6 Kg4g5 Kd4d3 Bd1h5 Rh7h8 Bh5g6+ Kd3d2 Bg6e4 Kd2e1
     28	01:20	   4.464.324	56.867	+1.97	Re3xg3 Kf6e5 Kd2e1 Ke5f4 Rg3g7 Bd1a4 h2h4 Ba4e8 Ke1xe2 Be8b5+ Ke2d2 Bb5e8 Kd2d3 Be8h5 Kd3d4 Bh5d1 Rg7h7 Kf4g4 h4h5 f5f4 h5h6 Kg4g5 Kd4d3 Bd1h5 Rh7h8 Bh5g6+ Kd3d2 Bg6e4 Kd2e1
     29+	02:53	   8.282.690	48.997	+2.17	Re3xg3
     29+	03:44	  12.415.664	56.776	+2.37	Re3xg3
     29+	05:40	  22.249.714	67.049	+2.77	Re3xg3
     29	08:33	  33.721.966	67.247	+3.42	Re3xg3 Kf6e5 Kd2e1 f5f4 Rg3g5+ Ke5f6 Rg5g1 f4f3 h2h4 Bd1c2 Ke1f2 Bc2e4 h4h5 Kf6f7 h5h6 Kf7f8 Rg1g7 Be4f5 Rg7b7 Kf8g8 Rb7e7 Bf5d3 Kf2xf3 Kg8f8 Re7e3 Bd3b5 Kf3f2 Kf8g8 Re3e7 Bb5d3 Re7g7+
     30	09:40	  39.414.946	69.554	+3.42	Re3xg3 Kf6e5 Kd2e1 f5f4 Rg3g5+ Ke5f6 Rg5g1 f4f3 h2h4 Bd1c2 Ke1f2 Bc2e4 h4h5 Kf6f7 h5h6 Kf7f8 Rg1g7 Be4f5 Rg7b7 Kf8g8 Rb7e7 Bf5d3 Kf2xf3 Kg8f8 Re7e3 Bd3b5 Kf3f2 Kf8g8 Re3e7 Bb5d3 Re7g7+
   10/29/2009 5:47:47 PM, Time for this analysis: 00:10:00, Rated time: 10:00

0 of 1 matching moves
10/29/2009 5:47:48 PM, Total time: 12:10:21 AM
Rated time: 10:00 = 600 Seconds
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kgburcham
Posts: 2016
Joined: Sun Feb 17, 2008 4:19 pm

Re: Neat position: Rybka claims win but it seems a draw

Post by kgburcham »

Dan check this position after your line up to Kg8

[d] 5k2/1R6/7P/5b2/8/5p2/4pK2/8 b - - 0 10


1. Rxg3 Ke5 2. Ke1 f4 3. Rg5+ Kf6 4. Rg1 f3 5. h4 Bc2 6. Kf2 Be4 7. h5 Kf7 8.h6 Kf8 9. Rg7 Bf5 10. Rb7 e1=Q+ 11. Kxe1 f2+ 12. Kxf2 Kg8 *
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adieguez

Re: Neat position: Rybka claims win but it seems a draw

Post by adieguez »

forget it, choose life
Thomas Mayer wrote:Well, I analyzed a bit down with Quark, concentrating on a line like
Rxg3 f4 Rg1 Kf5

it seems that in this line black will always lose the f-pawn. Anyway, I wonder whether the resulting 6-men is still a draw. Can anyone try that out with a full set of 6-men ?

Greets, Thomas
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