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

Author: Mogens Larsen

Date: 06:41:37 11/05/00

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On November 04, 2000 at 22:51:34, Uri Blass wrote:

>[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+

Little Goliath under Fritz Light agrees with you.

Analysis by LG2000 v2.9a:

1...Qe4+ 2.Kf2 Qd4+ 3.Ke2 Qxe5+ 4.Kd2 Qg5+
  +-  (4.04)   Depth: 6   00:00:00  164kN
1...Qe4+ 2.Kf2 Qd4+ 3.Ke2 Qxe5+ 4.Kd2 Qg5+
  =  (0.00)   Depth: 7   00:00:00  388kN
1...Qe4+ 2.Kf2 Qd4+ 3.Ke2 Qxe5+ 4.Kd2 Qg5+ 5.Kd3 Qf5+ 6.Kc3 Qh3+ 7.Kb2 Qh2+
8.Kb3
  =  (0.00)   Depth: 7   00:00:00  388kN
1...Qe4+ 2.Kf2 Qd4+ 3.Ke2 Qxe5+ 4.Kd2 Qg5+ 5.Kd3 Qf5+ 6.Kc3 Qh3+ 7.Kb2 Qh2+
8.Kb3
  =  (0.00)   Depth: 8   00:00:00  948kN
1...Qe4+ 2.Kf2 Qd4+ 3.Ke2 Qxe5+ 4.Kd2 Qg5+ 5.Kd3 Qf5+ 6.Kc3 Qh3+ 7.Kb2 Qh2+
8.Kb3
  =  (0.00)   Depth: 9   00:00:00  1198kN
1...Qe4+ 2.Kf2 Qd4+ 3.Ke2 Qxe5+ 4.Kd2 Qg5+ 5.Kd3 Qf5+ 6.Kc3 Qh3+ 7.Kb2 Qh2+
8.Kb3
  =  (0.00)   Depth: 10   00:00:01  2016kN
1...Qe4+ 2.Kf2 Qd4+ 3.Ke2 Qxe5+ 4.Kd2 Qg5+ 5.Kd3 Qf5+ 6.Kc3 Qh3+ 7.Kb2 Qh2+
8.Kb3
  =  (0.00)   Depth: 11   00:00:01  2948kN
1...Qe4+ 2.Kf2 Qd4+ 3.Ke2 Qxe5+ 4.Kd2 Qg5+ 5.Kd3 Qf5+ 6.Kc3 Qh3+ 7.Kb2 Qh2+
8.Kb3
  =  (0.00)   Depth: 12   00:00:03  8503kN
1...Qe4+ 2.Kf2 Qd4+ 3.Ke2 Qxe5+ 4.Kd2 Qg5+ 5.Kd3 Qf5+ 6.Kc3 Qh3+ 7.Kb2 Qh2+
8.Kb3
  =  (0.00)   Depth: 13   00:00:06  15199kN
1...Qe4+ 2.Kf2 Qd4+ 3.Ke2 Qxe5+ 4.Kd2 Qg5+ 5.Kd3 Qf5+ 6.Kc3 Qh3+ 7.Kb2 Qh2+
8.Kb3
  =  (0.00)   Depth: 14   00:00:13  30961kN
1...Qe4+ 2.Kf2 Qd4+ 3.Ke2 Qxe5+ 4.Kd2 Qg5+ 5.Kd3 Qf5+ 6.Kc3 Qh3+ 7.Kb2 Qh2+
8.Kb3
  =  (0.00)   Depth: 15   00:00:29  70378kN
1...Qe4+ 2.Kf2 Qd4+ 3.Ke2 Qxe5+ 4.Kd2 Qg5+ 5.Kd3 Qf5+ 6.Kc3 Qh3+ 7.Kb2 Qh2+
8.Kb3
  =  (0.00)   Depth: 16   00:01:46  259123kN
1...Qe4+ 2.Kf2 Qd4+ 3.Ke2 Qxe5+ 4.Kd2 Qg5+ 5.Kd3 Qf5+ 6.Kc3 Qh3+ 7.Kb2 Qh2+
8.Kb3
  =  (0.00)   Depth: 17   00:04:11  577868kN

Best wishes...
Mogens



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