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Subject: Re: Shredder 7.04 goes insane?

Author: Aaron Gordon

Date: 18:44:39 12/12/03

Go up one level in this thread


On December 12, 2003 at 17:30:33, Joachim Rang wrote:

>which hardware do you use tot get depth 21 in 46 seconds? On my Athlon 1500 Mhz
>it needs over 4 minutes.
>
>I can reproduce the strange PVs and also that Shredder 7.04 isn't able to mate.
>
>regards Joachim

Athlon XP running a true 2.5GHz. To get it to do this (usually it is the
opposite) you'll want to run a small hash size. Seems to make it go crazy much
faster. Here is my run with 8mb hash...


[D]7Q/2k3K1/8/8/8/8/8/8 b - - 0 1

Analysis by Shredder 7.04:

1...Kd6 2.Kf6 Kd5 3.Qh4 Kc5 4.Ke5 Kb6 5.Kd6 Kb7 6.Qb4+
  +-  (12.30)   Depth: 1/1   00:00:00
1...Kd6 2.Kf6 Kd5 3.Qh4 Kc5 4.Ke5 Kb6 5.Kd6 Kb7 6.Qb4+
  +-  (12.30)   Depth: 1/10   00:00:00
1...Kd6 2.Qc8 Kd5 3.Qd7+ Ke4 4.Kf7
  +-  (12.84)   Depth: 2/3   00:00:00
1...Kd6 2.Qe8 Kc5 3.Qe5+ Kc4 4.Qe4+ Kc3 5.Qf3+ Kb4 6.Kf6
  +-  (12.98)   Depth: 2/6   00:00:00
1...Kd6 2.Qf8+ Kd5 3.Qe7
  +-  (12.90)   Depth: 3/5   00:00:00
1...Kd6 2.Qf8+ Kd5 3.Qf5+ Kc4 4.Qe4+ Kc5 5.Kf7
  +-  (13.07)   Depth: 4/11   00:00:00
1...Kd6 2.Qb8+ Kc5 3.Kf6 Kc4 4.Qb2
  +-  (13.12)   Depth: 5/13   00:00:00
1...Kd6 2.Kf6 Kc5 3.Ke6 Kc4 4.Qb2 Kd3 5.Ke5
  +-  (13.31)   Depth: 6/15   00:00:00
1...Kd6 2.Kf6 Kd5 3.Qa8+ Kd4 4.Qe8
  +-  (13.39)   Depth: 7/17   00:00:00  53kN
1...Kd6 2.Kf7 Kc6 3.Qc3+ Kb7 4.Ke6 Kb8 5.Qb4+ Kc7
  +-  (13.64)   Depth: 8/19   00:00:00  102kN
1...Kd6 2.Kf7 Kd5 3.Qc3 Ke4 4.Kf6 Kf4 5.Qe5+ Kg4 6.Ke6
  +-  (13.64)   Depth: 8/19   00:00:00  143kN
1...Kd6 2.Kf7 Kd5 3.Qc3 Ke4 4.Kf6 Kd5 5.Qd3+ Kc6 6.Qc4+ Kd7
  +-  (13.64)   Depth: 9/19   00:00:00  267kN
1...Kd6 2.Kf7 Kd5 3.Qc3 Ke4 4.Ke6 Kf4 5.Qh3 Ke4 6.Qh5
  +-  (13.70)   Depth: 10/23   00:00:00  401kN
1...Kd6 2.Kf7 Kd5 3.Qc3 Ke4 4.Ke6 Kf4 5.Qh3 Ke4 6.Qg4+ Kd3 7.Kd5
  +-  (13.78)   Depth: 11/25   00:00:00  548kN
1...Kd6 2.Kf7 Kd5 3.Qc3 Ke4 4.Ke6 Kf4 5.Qd4+ Kf3 6.Qd3+ Kf2 7.Qd2+ Kf1 8.Ke5
  +-  (13.80)   Depth: 12/27   00:00:00  756kN
1...Kd6 2.Qh5 Kc6 3.Kf7 Kb6 4.Ke6 Kc6 5.Qf3+
  +-  (14.05)   Depth: 13/29   00:00:01  1626kN
1...Kd6 2.Qh5 Kc6 3.Kf7 Kb6 4.Ke6 Kc6 5.Qh8 Kb7
  +-  (14.29)   Depth: 13/29   00:00:01  1665kN
1...Kc6 2.Kf7 Kc5 3.Qc3+ Kd5 4.Qd3+ Ke5 5.Qc3+ Kf5 6.Qb4
  +-  (14.28)   Depth: 13/29   00:00:01  1916kN
1...Kc6 2.Qh5 Kb6 3.Kf7 Ka6 4.Ke6 Kb6 5.Qh8 Ka6
  +-  (14.28)   Depth: 13/29   00:00:02  2573kN
1...Kc6 2.Qh5 Kb6 3.Kf7 Ka6 4.Ke6 Kb6 5.Qh8 Kc5 6.Qc3+ Kb6
  +-  (14.53)   Depth: 14/25   00:00:02  2609kN
1...Kc6 2.Qh5 Kb6 3.Kf7 Ka6 4.Ke6 Kb6 5.Qh8 Ka7 6.Qc8 Kb6 7.Qc3 Ka7
  +-  (#15)   Depth: 14/25   00:00:02  2615kN
1...Kc6 2.Qh5 Kb6 3.Kf7 Kc6 4.Ke6 Kb6 5.Qh8 Kc5 6.Qc3+ Kb6
  +-  (#11)   Depth: 14/27   00:00:03  3162kN
1...Kd6 2.Qh5 Kc6 3.Kf7
  +-  (#11)   Depth: 14/27   00:00:03  3281kN
1...Kd6 2.Qh5 Kc6 3.Kf7 Kb6 4.Ke6
  +-  (#11)   Depth: 14/27   00:00:03  3283kN
1...Kd6 2.Qh5 Kc6 3.Qa5 Kd6 4.Kf7 Kc6 5.Ke6 Kb7 6.Qb5+ Kc7
  +-  (#8)   Depth: 15/27   00:00:04  5186kN
1...Kd6 2.Qh5 Kc6 3.Qa5 Kd6 4.Qb5 Kc7 5.Kf7 Kc8 6.Kf6 Kc7 7.Ke6 Kc8 8.Qc6+
  +-  (#6)   Depth: 16/27   00:00:06  6468kN
1...Kd6 2.Qh5 Kc6 3.Qe5 Kb7 4.Qb5+ Kc7 5.Kf7 Kc8 6.Kf6 Kd8 7.Ke6 Kc8 8.Qc6+
  +-  (#2)   Depth: 17/31   00:00:07  7825kN
1...Kd6 2.Qh5 Kc6 3.Qa5 Kd6 4.Kf6 Kc6 5.Ke6 Kb7 6.Qb5+ Ka7 7.Kd6 Ka8 8.Ke6 Ka7
9.Kd6 Ka8 10.Ke6 Ka7 11.Kd6
  -+  (-#11)   Depth: 18/33   00:00:12  13124kN
1...Kd6 2.Qh5 Kc6 3.Qa5 Kd6 4.Kf7 Kd7 5.Qb5+ Kd6 6.Kf6 Kc7 7.Ke6 Kd8 8.Qa5+ Ke8
9.Qc5 Kd8 10.Qf8+
  -+  (-#16)   Depth: 18/33   00:00:15  16263kN
1...Kd6 2.Qh5 Ke7 3.Qb5 Ke6 4.Qc5 Kd7 5.Kf6 Ke8 6.Ke6 Kd8 7.Qf8+ Kc7
  -+  (-#29)   Depth: 19/31   00:00:16  17556kN
1...Kd6 2.Qh5 Kc6 3.Qa5 Kd6 4.Kf6 Kc6 5.Ke6 Kb7 6.Kd7 Kb8 7.Qb5+ Ka8 8.Ke6 Ka7
9.Kf7 Ka8 10.Kf6 Ka7 11.Ke6 Ka8 12.Ke5
  -+  (-#54)   Depth: 19/35   00:00:22  24042kN
1...Kd6 2.Qh5 Kc6 3.Qa5 Kd6 4.Kf6 Kc6 5.Ke6 Kb7 6.Kd7 Kb8 7.Qb5+ Ka8 8.Ke6 Ka7
9.Kf7 Ka8 10.Kf6 Ka7 11.Ke6 Ka8 12.Ke5
  -+  (-#54)   Depth: 19/35   00:00:22  24042kN
1...Kd6 2.Qh5 Kc6 3.Qa5 Kd6 4.Kf6 Kd7 5.Kf7 Kc8 6.Ke7 Kb7 7.Kd7 Kb8 8.Qb5+ Ka7
9.Ke6 Ka8 10.Ke5 Ka7 11.Kf6 Ka8 12.Ke6 Ka7 13.Kf7 Ka8 14.Kf6 Ka7 15.Ke6 Ka8
  -+  (-#66)   Depth: 20/33   00:00:23  25303kN
1...Kd6 2.Qh5 Kd7 3.Qd5+ Ke7 4.Qc6 Kd8 5.Qb5 Ke7 6.Qd5 Ke8 7.Qc5 Kd8 8.Kf6 Kd7
9.Kf7 Kd8 10.Qb6+ Kd7 11.Qa5 Kc8 12.Ke7 Kb8 13.Kd7 Kb7 14.Qb5+ Ka7 15.Ke6 Ka8
  -+  (-#91)   Depth: 20/33   00:00:25  27539kN
1...Kd6 2.Qh5 Kd7 3.Qd5+ Ke7 4.Qc6 Kd8 5.Qb5 Ke7 6.Qd5 Ke8 7.Qc5 Kd8 8.Kf6 Kd7
9.Kf7 Kd8 10.Qb6+ Kd7 11.Qa5 Kc8 12.Ke7 Kb8 13.Kd7 Kb7 14.Qb5+ Ka7 15.Ke6 Ka8
  -+  (-#91)   Depth: 20/33   00:00:25  27539kN
1...Kd6 2.Qh5 Kd7 3.Qd5+ Ke7 4.Qc5+ Ke6 5.Qg5 Kd7 6.Kf7 Kc7 7.Qc5+ Kb8 8.Kf6 Kb7
9.Ke5 Kb8 10.Qc6 Ka7
  -+  (-#104)   Depth: 21/33   00:00:30  32885kN
1...Kd6 2.Qh5 Kd7 3.Qd5+ Ke7 4.Qc4 Kd6 5.Kf6 Kd7 6.Qb5+ Kc8 7.Ke6 Kc7 8.Ke7 Kc8
9.Qc6+ Kb8 10.Ke6 Ka7 11.Qb5 Ka8 12.Ke5 Ka7 13.Kf6 Ka8 14.Ke6 Ka7 15.Kf7 Ka8
  -+  (-#129)   Depth: 21/35   00:00:42  45213kN
1...Kd6 2.Qh5 Kd7 3.Qd5+ Ke7 4.Qc4 Kd6 5.Kf6 Kd7 6.Qb5+ Kc8 7.Ke6 Kc7 8.Ke7 Kc8
9.Qc6+ Kb8 10.Ke6 Ka7 11.Qb5 Ka8 12.Ke5 Ka7 13.Kf6 Ka8 14.Ke6 Ka7 15.Kf7 Ka8
  -+  (-#129)   Depth: 21/35   00:00:42  45213kN
1...Kd6 2.Qh5 Kd7 3.Qd5+ Kc7 4.Qc5+ Kd7 5.Kf7 Kd8 6.Qb6+ Kd7 7.Qa5 Kc8 8.Ke7 Kb8
9.Kd7 Kb7 10.Qb5+ Ka7 11.Ke6 Ka8 12.Ke5 Ka7 13.Kf6 Ka8 14.Ke6 Ka7 15.Kf7 Ka8
  -+  (-#141)   Depth: 22/35   00:00:43  45758kN
1...Kd6 2.Qh5 Kd7 3.Qd5+ Ke7 4.Qc4 Ke8 5.Qc5 Kd8 6.Kf6 Ke8 7.Ke6 Kd8 8.Qf8+ Kc7
9.Qd6+ Kc8 10.Qd7+ Kb8 11.Qc6 Ka7 12.Qb5 Ka8 13.Ke5 Ka7 14.Kd5 Ka8 15.Qc6+
  -+  (-#172)   Depth: 22/37   00:00:44  46995kN
1...Kd6 2.Qh5 Kd7 3.Qd5+ Ke7 4.Qc4 Ke8 5.Qc5 Kd8 6.Kf6 Ke8 7.Ke6 Kd8 8.Qf8+ Kc7
9.Qd6+ Kc8 10.Qd7+ Kb8 11.Qc6 Ka7 12.Qb5 Ka8 13.Ke5 Ka7 14.Kd5 Ka8 15.Qc6+
  -+  (-#172)   Depth: 22/37   00:00:44  46995kN
1...Kd6 2.Qh5 Kd7 3.Qd5+ Ke7 4.Qc4 Ke8 5.Qc5 Kd8 6.Kf6 Kd7 7.Kf7 Kd8 8.Qb6+ Kd7
9.Qa5 Kc8 10.Ke7 Kb8 11.Kd7 Kb7 12.Qb5+ Ka7 13.Ke6 Ka8 14.Ke5 Ka7 15.Kd5 Ka8
  -+  (-#184)   Depth: 23/23   00:00:44  47001kN




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