Author: Richard Pijl
Date: 09:00:02 07/27/04
Go up one level in this thread
On July 27, 2004 at 11:44:26, David Dahlem wrote:
>On July 27, 2004 at 11:10:18, chandler yergin wrote:
>
>>There appears to be a serious flaw in the Fritz Program in regard to
>>positional understanding of some simple endgame positions.
>>
>>Example:
>>
>>
>>
>>[D] 8/7p/4k3/1K4b1/P7/3p3P/8/4B3 w - - 0 1
>>
>>Analysis by Fritz 8:
>>
>>1. -+ (-2.06): 58.a5 d2 59.Bxd2 Bxd2 60.a6 Be3 61.Kc6 Kf5 62.Kb7 Kf4 63.h4 h5
>>64.Kc6 Kg3 65.Kc7 Bf2 66.Kb8 Kxh4
>>2. -+ (-2.06): 58.Kc4 d2 59.Bxd2 Bxd2 60.a5 Ke5 61.Kd3
>>
>>
>>Hiarchs & Crafty immediately spot it, and show the correct move.
>>
>>Congratulations to them!
>>
>>BTW.. How does your Engine do?
>>Good Test Position.
>>
>>The above position is from a Correspondence game where both players
>>must have used Fritz, and followed the Eval.
>>Black won.
>>
>>Both are strong players, who shall remain anonymous, so as not to embarrass
>>them.
>>Had they not used Program help, they should have easily seen the correct
>>Drawing method.
>>CY
>
>[D]8/7p/4k3/1K4b1/P7/3p3P/8/4B3 w - - 0 1
>
>After forcing a5, Ruffian 2.1.0 says its a draw. :-)
The Baron says draw too. It needs just 1 second for it:
ply time nodes score pv
6(11)& 0:00.03 13003 +1.66 d3-d2 Be1xd2 Bg5xd2 a5-a6 Bd2-e3 Kb5-c6
Be3-d4 Kc6-b7
6(15). 0:00.08 24875 +1.66 d3-d2 Be1xd2 Bg5xd2 a5-a6 Bd2-e3 Kb5-c6
Be3-d4 Kc6-b7
7(12)& 0:00.09 33048 +1.72 d3-d2 Be1xd2 Bg5xd2 a5-a6 Bd2-e3 Kb5-c6
Ke6-f5 Kc6-b7 Kf5-e4
7(14). 0:00.13 48524 +1.72 d3-d2 Be1xd2 Bg5xd2 a5-a6 Bd2-e3 Kb5-c6
Ke6-f5 Kc6-b7 Kf5-e4
8(18)- 0:00.28 108729 +1.37 d3-d2 (Be1xd2) (Bg5xd2) (a5-a6) (Bd2-e3) (
Kb5-c6)
(Ke6-f5) (Kc6-b7) (Kf5-e4) (a6-a7) (h7-h5)
8(18)- 0:00.45 168514 +0.47 d3-d2 (Be1xd2) (Bg5xd2) (a5-a6) (Bd2-e3) (
Kb5-c6)
(Ke6-f5) (Kc6-b7) (Kf5-e4) (a6-a7) (h7-h5)
8(18)& 0:00.45 172678 +0.39 d3-d2 Be1xd2 Bg5xd2 a5-a6 Bd2-e3 Kb5-c6
Ke6-f5 Kc6-b7 Kf5-e4 a6-a7 Be3xa7
8(18). 0:00.52 189118 +0.39 d3-d2 Be1xd2 Bg5xd2 a5-a6 Bd2-e3 Kb5-c6
Ke6-f5 Kc6-b7 Kf5-e4 a6-a7 Be3xa7
9(18)- 0:00.95 341685 +0.04 d3-d2 (Be1xd2) (Bg5xd2) (Kb5-c4) (Ke6-f5)
(Kc4-d3)
(Bd2-f4) (a5-a6) (Bf4-b8) (Kd3-e3) (h7-h5)
9(18)& 0:00.97 347225 +0.01 d3-d2 Be1xd2 Bg5xd2 Kb5-c4 Ke6-f5 Kc4-d3
Bd2-f4 a5-a6 Bf4-b8 Kd3-e3 h7-h5
9(18). 0:01.03 384040 +0.01 d3-d2 Be1xd2 Bg5xd2 Kb5-c4 Ke6-f5 Kc4-d3
Bd2-f4 a5-a6 Bf4-b8 Kd3-e3 h7-h5
10(16)& 0:01.16 420994 +0.01 d3-d2 Be1xd2 Bg5xd2 Kb5-c4 Ke6-f5 Kc4-d3
Bd2-f4 a5-a6 Bf4-b8 Kd3-e3 h7-h5 a6-a7
Bb8xa7
10(18). 0:01.38 510590 +0.01 d3-d2 Be1xd2 Bg5xd2 Kb5-c4 Ke6-f5 Kc4-d3
Bd2-f4 a5-a6 Bf4-b8 Kd3-e3 h7-h5 a6-a7
Bb8xa7
11(17)& 0:01.67 606653 +0.01 d3-d2 Be1xd2 Bg5xd2 Kb5-c4 Ke6-f5 Kc4-d3
Bd2-f4 a5-a6 Bf4-b8 Kd3-e3 Bb8-a7 Ke3-f3
h7-h5 h3-h4
>
>Ruffian 2.1.0
> 1 00:00 -0.52 1. ... h6
> 1 00:00 -0.58 1. ... h5
> 1 00:00 -2.72 1. ... d2 2.Bxd2 Bxd2
> 2 00:00 -2.19 1. ... d2 2.Bxd2 Bxd2 3.a6
> 3 00:00 -2.29 1. ... d2 2.Bxd2 Bxd2 3.a6 Ke5
> 4 00:00 -1.97 1. ... d2 2.Bxd2 Bxd2 3.a6 Be3 4.Kc6
> 5 00:00 -2.53 1. ... d2 2.Bxd2 Bxd2 3.a6 Be3 4.Kc6 Ba7
> 6 00:00 -2.52 1. ... d2 2.Bxd2 Bxd2 3.a6 Be3 4.Kc6 Ba7 5.h4
> 7 00:00 -2.16 1. ... d2 2.Bxd2 Bxd2 3.Kb6 Be3+ 4.Kb7 Kf5 5.a6 Ke4 6.h4
> 8 00:00 -2.23 1. ... d2 2.Bxd2 Bxd2 3.Kb6 Be3+ 4.Kc6 Ke5 5.a6 Bd4 6.Kb7 Ke4
> 9 00:00 -2.39 1. ... d2 2.Bxd2 Bxd2 3.Kb6 Be3+ 4.Kc6 Ke5 5.a6 Kf4 6.Kb7 Kg3
>7.a7 Bxa7 8.Kxa7
>10 00:01 -2.24 1. ... d2 2.Bxd2 Bxd2 3.a6 Be3 4.Kc6 Kf5 5.Kb7 h5 6.a7 Bxa7
>7.Kxa7 h4 8.Kb6
>11 00:01 -2.24 1. ... d2 2.Bxd2 Bxd2 3.a6 Be3 4.Kc6 Kf5 5.Kb7 h5 6.a7 Bxa7
>7.Kxa7 h4 8.Kb6 Kf4
>12 00:02 -2.59 1. ... d2
>12 00:02 -2.93 1. ... d2 2.Bxd2 Bxd2 3.a6 Be3 4.Kc6 Ke5 5.Kd7 Bf2 6.Kc7 Kf4
>7.Kd6 Kg3 8.h4 Kxh4
>13 00:05 -2.58 1. ... d2
>13 00:06 0.00 1. ... d2 2.Bxd2 Bxd2 3.Kc4 Bxa5 4.Kd3 Kf5 5.Ke2 Kf4 6.Kf2
>Bd8 7.Kg2 h5 8.h4 Bxh4
>14 00:14 0.00 1. ... d2 2.Bxd2 Bxd2 3.Kc4 Bxa5 4.Kd3 Kf5 5.Ke2 Kf4 6.Kf2
>Bd8 7.Kg2 h5 8.h4 Bxh4 9.Kh1
>15 00:24 0.00 1. ... d2 2.Bxd2 Bxd2 3.Kc4 Bxa5 4.Kd3 Kf5 5.Ke2 Kf4 6.Kf2
>Bd8 7.Kg2 h5 8.h4 Bxh4 9.Kh1 Bf2
>16 00:47 0.00 1. ... d2 2.Bxd2 Bxd2 3.Kc4 Bxa5 4.Kd3 Kf5 5.Ke2 Kf4 6.Kf2
>Bd8 7.Kg2 h5 8.h4 Bxh4 9.Kh1 Bf2 10.Kg2
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