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Subject: Re: an endgame test position

Author: Martin Giepmans

Date: 00:15:45 08/29/04

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On August 28, 2004 at 18:40:43, martin fierz wrote:

>aloha!
>
>after all the cloning talk, here's something to test your favorite engine with:
>i played a weakish IM today and got the following position after 56...Qg6+
>57.Kf2:
>
>[D] 8/6kp/8/3p4/1P4q1/P4p2/5K2/4Q3 b - - 0 57
>
>it took me a couple of seconds to see that after 57...Qh4+ 58. Kf1 Qxe1+ 59.
>Kxe1 Kf6 black is completely winning due to the floating square (it's nice to
>see that reading dvoretzky is some good!) and so i played that and won :-)
>
>interestingly, when i entered this game in chessbase running fritz7 in the
>background, fritz didn't seem to see this at all within a minute or so. so
>question to all: how long does your favorite engine need to see the line ...Qh4+
>Kf1 Qxe1+ with a HUGE plus score (i.e. +9 or so - that is what my assessment of
>the position was after a couple of seconds...)?
>
>i don't want to claim that this is the only win, but it is by far the easiest
>one, and fritz 7 misses it completely.
>
>cheers
>  martin


My engine sticks with Qg2, but it does exchange queens and the score is
quite convincing after a while. :)

SpiderChess (AMD 2000 XP)
05  0:00:00  + 7.52  G4-H4 F2-F1 H4xE1 F1xE1 G7-F7
05  0:00:00  + 7.52  G4-H4 F2-F1 H4xE1 F1xE1 G7-F7
06  0:00:00  + 0.96  G4-H4 F2-F1 H4-F4 F1-F2 G7-F6 A3-A4
    0:00:00  + 1.12  G7-F7 E1-E3 G4-G2 F2-E1 G2-G3 E1-D2 F7-F6
07  0:00:00  + 1.12  G7-F7 E1-E3 G4-G2 F2-E1 G2-G3 E1-D2 F7-F6
08  0:00:00  + 1.12  G7-F7 E1-E3 G4-G2 F2-E1 G2-G3 E1-D2 F7-F6
09  0:00:00  + 0.74  G7-F7 E1-E3 G4-G2 F2-E1 G2-G3 E1-D1 F7-F6 E3-H6 G3-G6
    0:00:01  + 3.20  G4-G2 F2-E3 G7-F8 E1-D2 D5-D4 E3-D3 G2xD2 D3xD2 F8-E7
09  0:00:01  + 3.84  G4-G2 F2-E3 G7-F8 E1-D2 D5-D4 E3-D3 G2xD2 D3xD2 F8-F7
10  0:00:02  + 3.84  G4-G2 F2-E3 G7-F8 E1-D2 D5-D4 E3-D3 G2xD2 D3xD2 F8-F7
11  0:00:03  + 4.40  G4-G2 F2-E3 G7-F8 E1-D2 D5-D4 E3-D3 G2xD2 D3xD2 F8-E7
11  0:00:04  + 4.32  G4-G2 F2-E3 G7-F8 E1-D2 D5-D4 E3-D3 G2xD2 D3xD2 F8-E7
12  0:00:11  + 4.24  G4-G2 F2-E3 G7-F8 E1-D2 D5-D4 E3-D3 G2xD2 D3xD2 F8-E7
13  0:00:31  + 3.76  G4-G2 F2-E3 G7-F8 E1-D2 D5-D4 E3-D3 G2xD2 D3xD2 F8-E7
14  0:00:44  + 4.88  G4-G2 F2-E3 G7-F8 E1-D2 D5-D4 E3-D3 G2xD2 D3xD2 F8-E7
14  0:01:13  + 5.44  G4-G2 F2-E3 G7-F8 E1-D2 D5-D4 E3-D3 G2xD2 D3xD2 H7-H5
15  0:01:36  + 6.24  G4-G2 F2-E3 G7-F8 E1-D2 D5-D4 E3-D3 G2xD2 D3xD2 F8-E7
15  0:01:38  + 7.44  G4-G2 F2-E3 G7-F8 E1-B1 G2-E2 E3-F4 E2-E4 B1xE4 D5xE4
15  0:01:39  + 8.48  G4-G2 F2-E3 G7-F8 E1-D2 D5-D4 E3-D3 G2xD2 D3xD2 F8-E7
15  0:02:26  + 7.84  G4-G2 F2-E3 G7-F8 E1-D2 D5-D4 E3-D3 G2xD2 D3xD2 F8-E7
16  0:02:55  + 8.32  G4-G2 F2-E3 G7-F8 E1-D2 D5-D4 E3-D3 G2xD2 D3xD2 F8-E7
16  0:02:59  + 9.36  G4-G2 F2-E3 G7-F8 E1-B1 G2-E2 E3-F4 E2-E4 B1xE4 D5xE4
16  0:03:06  + 10.40 G4-G2 F2-E3 G7-F8 E1-B1 G2-E2 E3-F4 E2-E4 B1xE4 D5xE4
16  0:04:15  + 11.12 G4-G2 F2-E3 G7-F8 E1-B1 G2-E2 E3-F4 E2-E4 B1xE4 D5xE4
17  0:06:22  + 11.44 G4-G2 F2-E3 G7-F8 E1-B1 G2-E2 E3-F4 E2-E4 B1xE4 D5xE4
17  0:06:27  + 12.48 G4-G2 F2-E3 G7-F8 E1-B1 G2-E2 E3-F4 E2-E4 B1xE4 D5xE4
17  0:06:31  + 13.52 G4-G2 F2-E3 G7-F8 E1-B1 G2-E2 E3-F4 E2-E4 B1xE4 D5xE4
17  0:06:39  + 14.56 G4-G2 F2-E3 G7-F8 E1-B1 G2-E2 E3-F4 E2-E4 B1xE4 D5xE4
17  0:09:42  + 14.96 G4-G2 F2-E3 G7-F8 E1-D2 D5-D4 E3-D3 G2xD2 D3xD2 F8-E7
                     A3-A4 E7-D6 A4-A5 D6-C6 A5-A6 C6-B6 B4-B5 H7-H5 D2-D1
                     H5-H4 D1-E1 H4-H3 A6-A7 B6xA7 E1-F2 H3-H2 F2xF3 H2-H1D
                     F3-E2 A7-B6

Martin





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