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Subject: Re: A test position about perpetual check(Junior-Insomniac)

Author: Thomas Mayer

Date: 06:09:29 11/05/00

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Hi Uri,

>[D]Q3b3/3k1p2/4p2P/3pP3/1q6/8/Q5K1/8 b - - 0 1

>I believe that in this position black can force perpetual check by Qe4+

>How much time do chess programs need to see the perpetual check(I did not prove
>that there is a perpetual check but comp-comp games from this position ended in
>a draw).

Here some Analysis from Goliath Light of the Young Talents:

Analysis by Goliath Light:

1...Dg4+ 2.Kf2 Df4+ 3.Ke2 Dxe5+ 4.Kd2 Dg5+ 5.Ke2 Dh5+ 6.Kd2 Dxh6+ 7.Ke2 Dh5+
8.Kd2
  =  (0.00)   Tiefe: 6/22   00:00:00
1...Dg4+ 2.Kf2 Df4+ 3.Ke2 Dxe5+ 4.Kd2 Dg5+ 5.Ke2 Dh5+ 6.Kd2 Dxh6+ 7.Ke2 Dh5+
8.Kd2
  =  (0.00)   Tiefe: 6/22   00:00:00  195kN
1...Dg4+ 2.Kf2 Df4+ 3.Ke2 Dxe5+ 4.Kd2 Dg5+ 5.Ke2 Dh5+ 6.Kd2 Dxh6+ 7.Ke2 Dh5+
8.Kd2
  =  (0.00)   Tiefe: 7/22   00:00:00  200kN
1...Dg4+ 2.Kf2 Df4+ 3.Ke2 Dxe5+ 4.Kd2 Dg5+ 5.Ke2 Dh5+ 6.Kd2 Dxh6+ 7.Ke2 Dh5+
8.Kd2
  =  (0.00)   Tiefe: 7/22   00:00:00  232kN
1...Dg4+ 2.Kf2 Df4+ 3.Ke2 Dxe5+ 4.Kd2 Dg5+ 5.Ke2 Dh5+ 6.Kd2 Dxh6+ 7.Ke2 Dh5+
8.Kd2
  =  (0.00)   Tiefe: 8/25   00:00:00  468kN
1...Dg4+ 2.Kf2 Df4+ 3.Ke2 Dxe5+ 4.Kd2 Dg5+ 5.Ke2 Dh5+ 6.Kd2 Dxh6+ 7.Ke2 Dh5+
8.Kd2
  =  (0.00)   Tiefe: 8/25   00:00:00  558kN
1...Dg4+ 2.Kf2 Df4+ 3.Ke2 Dxe5+ 4.Kd2 Dg5+ 5.Ke2 Dh5+ 6.Kd2 Dxh6+ 7.Ke2 Dh5+
8.Kd2
  =  (0.00)   Tiefe: 9/25   00:00:01  618kN
1...Dg4+ 2.Kf2 Df4+ 3.Ke2 Dxe5+ 4.Kd2 Dg5+ 5.Ke2 Dh5+ 6.Kd2 Dxh6+ 7.Ke2 Dh5+
8.Kd2
  =  (0.00)   Tiefe: 9/25   00:00:01  805kN
1...Dg4+ 2.Kf2 Df4+ 3.Ke2 Dxe5+ 4.Kd2 Dg5+ 5.Ke2 Dh5+ 6.Kd2 Dxh6+ 7.Ke2 Dh5+
8.Kd2
  =  (0.00)   Tiefe: 10/27   00:00:01  1421kN
1...Dg4+ 2.Kf2 Df4+ 3.Ke2 Dxe5+ 4.Kd2 Dg5+ 5.Ke2 Dh5+ 6.Kd2 Dxh6+ 7.Ke2 Dh5+
8.Kd2 Dg5+ 9.Kd3 Df5+
  =  (0.00)   Tiefe: 10/28   00:00:02  1829kN
1...Dg4+ 2.Kf2 Df4+ 3.Ke2 Dxe5+ 4.Kd2 Dg5+ 5.Ke2 Dh5+ 6.Kd2 Dxh6+ 7.Ke2 Dh5+
8.Kd2 Dg5+ 9.Kd3 Df5+
  =  (0.00)   Tiefe: 11/28   00:00:02  2119kN
1...Dg4+ 2.Kf2 Df4+ 3.Ke2 Dxe5+ 4.Kd2 Dg5+ 5.Ke2 Dh5+ 6.Kd2 Dxh6+ 7.Ke2 Dh5+
8.Kd2 Dg5+ 9.Kd3 Df5+
  =  (0.00)   Tiefe: 11/30   00:00:03  3325kN
1...Dg4+ 2.Kf2 Df4+ 3.Ke2 Dxe5+ 4.Kd2 Dg5+ 5.Ke2 Dh5+ 6.Kd2 Dxh6+ 7.Ke2 Dh5+
8.Kd2 Dg5+ 9.Kd3 Df5+
  =  (0.00)   Tiefe: 12/31   00:00:05  5128kN
1...Dg4+ 2.Kf2 Df4+ 3.Ke2 Dxe5+ 4.Kd2 Dg5+ 5.Ke2 Dh5+ 6.Kd2 Dxh6+ 7.Ke2 Dh5+
8.Kd2 Dg5+ 9.Kd3 Df5+
  =  (0.00)   Tiefe: 12/32   00:00:07  7942kN
1...Dg4+ 2.Kf2 Df4+ 3.Ke2 Dxe5+ 4.Kd2 Dg5+ 5.Ke2 Dh5+ 6.Kd2 Dxh6+ 7.Ke2 Dh5+
8.Kd2 Dg5+ 9.Kd3 Df5+
  =  (0.00)   Tiefe: 13/32   00:00:10  10964kN
1...Dg4+ 2.Kf2 Df4+ 3.Ke2 Dxe5+ 4.Kd2 Dg5+ 5.Ke2 Dh5+ 6.Kd2 Dxh6+ 7.Ke2 Dh5+
8.Kd2 Dg5+ 9.Kd3 Df5+
  =  (0.00)   Tiefe: 13/38   00:00:19  23021kN
1...Dg4+ 2.Kf2 Df4+ 3.Ke2 Dxe5+ 4.Kd2 Dg5+ 5.Ke2 Dh5+ 6.Kd2 Dxh6+ 7.Ke2 Dh5+
8.Kd2 Dg5+ 9.Kd3 Df5+
  =  (0.00)   Tiefe: 14/39   00:00:24  27940kN
1...Dg4+ 2.Kf2 Df4+ 3.Ke2 Dxe5+ 4.Kd2 Dg5+ 5.Ke2 Dh5+ 6.Kd2 Dxh6+ 7.Ke2 Dh5+
8.Kd2 Dg5+ 9.Kd3 Dg6+ 10.Kd4
  =  (0.00)   Tiefe: 14/39   00:00:53  61411kN
1...Dg4+ 2.Kf2 Df4+ 3.Ke2 Dxe5+ 4.Kd2 Dg5+ 5.Ke2 Dh5+ 6.Kd2 Dxh6+ 7.Ke2 Dh5+
8.Kd2 Dg5+ 9.Kd3 Dg6+ 10.Kd4
  =  (0.00)   Tiefe: 15/42   00:01:06  75038kN
1...Dg4+ 2.Kf2 Df4+ 3.Ke2 Dxe5+ 4.Kd2 Dg5+ 5.Ke2 Dh5+ 6.Kd2 Dxh6+ 7.Ke2 Dh5+
8.Kd2 Dg5+ 9.Kd3 Dg6+ 10.Kd4
  =  (0.00)   Tiefe: 15/44   00:04:39  289193kN
1...Dg4+ 2.Kf2 Df4+ 3.Ke2 Dxe5+ 4.Kd2 Dg5+ 5.Ke2 Dh5+ 6.Kd2 Dxh6+ 7.Ke2 Dh5+
8.Kd2 Dg5+ 9.Kd3 Dg6+ 10.Kd4
  =  (0.00)   Tiefe: 16/47   00:05:23  343040kN

(Mayer, Mayer International 05.11.2000)

We all know that Goliath thinks sometimes it is a draw when there is no draw,
but for me Goliath's line seems to be okay, what do you think ?

Greets, Thomas



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