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Subject: Re: test position Sh 7.04 , longer analysis : a bug ???

Author: Vincent Lejeune

Date: 05:14:22 11/10/03

Go up one level in this thread



When I camez back to shredder after posting the previous msg, I discovered a
strange thing, the mate depth change allover :

  +-  (#21)   Profondeur: 16/35   00:00:05  1685kN, tb=27393
1.Da1+ Rg8 2.Da2+ Rh8 3.Db2+ Rg8 4.Db3+ Rh8 5.Dc3+ Rg8 6.Dc4+ Rh8 7.Dd4+ Rg8
8.Dd5+ Rh8 9.Dh1+ Rg8 10.Dh7#
  +-  (#13)   Profondeur: 17/35   00:00:07  2668kN, tb=33755
1.Da1+ Rg8 2.Da2+ Rh8 3.Db 2+ Rg8 4.Db3+ Rh8 5.Dc3+ Rg8 6.Dc4+ Rh8 7.Dd4+ Rg8
8.Dd5+ Rh8 9.Dh1+ Rg8 10.Dh7#
  +-  (#13)   Profondeur: 18/37   00:00:13  4441kN, tb=49472
1.Da1+ Rg8 2.Da2+ Rh8 3.Db2+ Rg8 4.Db3+ Rh8 5.Dc3+ Rg8 6.Dc4+ Rh8 7.Dd4+ Rg8
8.Dd5+ Rh8 9.Dh1+ Fh4 10.Da1+ Rg8 11.Da2+ Rh8 12.Db2+ Rg8 13.Db3+ Rh8 14.Dc3+
Df6+ 15.Rxf6
  +-  (#19)   Profondeur: 19/39   00:05:00  205812kN, tb=115648
1.Da1+ Rg8 2.Da2+ Rh8 3.Db2+ Rg8 4.Db3+ Rh8 5.Dc3+ Rg8 6.Dc4+ Rh8 7.Dd4+ Rg8
8.Dd5+ Rh8 9.Dh1+ Fh4 10.Da1+ Rg8 11.Da2+ Rh8 12.Db2+ Rg8 13.Db3+ Rh8 14.Dc3+
Df6+ 15.Rxf6
  +-  (#17)   Profondeur: 20/41   00:07:17  298070kN, tb=221511
1.Da1+ Rg8 2.Da2+ Rh8 3.Db2+ Rg8 4.Db3+ Rh8 5.Dc3+ Rg8 6.Dc4+ Rh8 7.Dd4+ Rg8
8.Dd5+ Rh8 9.Dh1+ Fh4 10.Da1+ Rg8 11.Da2+ Rh8 12.Db2+ Rg8 13.Db3+ Rh8 14.Dc3+
Rg8 15.Dc4+
  +-  (#19)   Profondeur: 21/43   00:07:42  310308kN, tb=264935



On November 10, 2003 at 07:51:08, Vincent Lejeune wrote:

>
>Barton 2800+
>
>Analysis by Shredder 7.04:
>
>1.Rxg5
>  =  (-0.01)   Profondeur: 1/1   00:00:00
>1.Rxg5
>  =  (-0.01)   Profondeur: 1/1   00:00:00
>1.Rxg5
>  =  (-0.01)   Profondeur: 2/2   00:00:00
>1.Rxg5
>  =  (-0.01)   Profondeur: 3/3   00:00:00
>1.Da1+ Rg8 2.Da2+ Rh8 3.Da1+ Rg8 4.Da2+ Rh8 5.Da1+ Rg8
>  =  (0.01)   Profondeur: 3/7   00:00:00
>1.Da1+ Rg8 2.Da2+ Rh8 3.Da1+ Rg8 4.Da2+ Rh8 5.Da1+ Rg8
>  =  (0.01)   Profondeur: 3/11   00:00:00
>1.Da1+ Rg8 2.Da2+ Rh8 3.Da1+ Rg8 4.Da2+ Rh8 5.Da1+ Rg8
>  =  (0.01)   Profondeur: 4/7   00:00:00
>1.Da1+ Rg8 2.Da2+ Rh8 3.Db2+ Rg8 4.Db3+ Rh8 5.Dc3+ Rg8 6.Dc4+ Rh8 7.Dc3+ Rg8
>8.Dc4+ Rh8 9.Dc3+ Rg8
>  =  (0.03)   Profondeur: 5/16   00:00:00
>1.Da1+ Rg8 2.Da2+ Rh8 3.Db2+ Rg8 4.Db3+ Rh8 5.Dc3+ Rg8 6.Dc4+ Rh8 7.Dc3+ Rg8
>8.Dc4+ Rh8 9.Dc3+ Rg8
>  =  (0.03)   Profondeur: 6/13   00:00:00
>1.Da1+ Rg8 2.Da2+ Rh8 3.Db2+ Rg8 4.Db3+ Rh8 5.Dc3+ Rg8 6.Dc4+ Rh8 7.Dc3+ Rg8
>8.Dc4+ Rh8 9.Dc3+ Rg8
>  =  (0.03)   Profondeur: 7/15   00:00:00  6kN, tb=467
>1.Da1+ Rg8 2.Da2+ Rh8 3.Db2+ Rg8 4.Db3+ Rh8 5.Dc3+ Rg8 6.Dc4+ Rh8 7.Dc3+ Rg8
>8.Dc4+ Rh8 9.Dc3+ Rg8
>  =  (0.03)   Profondeur: 8/17   00:00:00  18kN, tb=993
>1.Da1+ Rg8 2.Da2+ Rh8 3.Db2+ Rg8 4.Db3+ Rh8 5.Dc3+ Rg8 6.Dc4+ Rh8 7.Dc3+ Rg8
>8.Dc4+ Rh8 9.Dc3+ Rg8
>  =  (0.03)   Profondeur: 9/20   00:00:00  38kN, tb=2003
>1.Da1+ Rg8 2.Da2+ Rh8 3.Db2+ Rg8 4.Db3+ Rh8 5.Dc3+ Rg8 6.Dc4+ Rh8 7.Dc3+ Rg8
>8.Dc4+ Rh8 9.Dc3+ Rg8
>  =  (0.03)   Profondeur: 10/15   00:00:00  67kN, tb=3185
>1.Da1+ Rg8 2.Da2+ Rh8 3.Db2+ Rg8 4.Db3+ Rh8 5.Dc3+ Rg8 6.Dc4+ Rh8 7.Dc3+ Rg8
>8.Dc4+ Rh8 9.Dc3+ Rg8
>  =  (0.03)   Profondeur: 11/18   00:00:00  124kN, tb=5680
>1.Da1+ Rg8 2.Da2+ Rh8 3.Db2+ Rg8 4.Db3+ Rh8 5.Dc3+ Rg8 6.Dc4+ Rh8 7.Dc3+ Rg8
>8.Dc4+ Rh8 9.Dc3+ Rg8
>  =  (0.03)   Profondeur: 12/17   00:00:00  215kN, tb=8949
>1.Da1+ Rg8 2.Da2+ Rh8 3.Db2+ Rg8 4.Db3+ Rh8 5.Dc3+ Rg8 6.Dc4+ Rh8 7.Dc3+ Rg8
>8.Dc4+ Rh8 9.Dc3+ Rg8
>  =  (0.03)   Profondeur: 13/21   00:00:01  347kN, tb=13661
>1.Da1+ Rg8 2.Da2+ Rh8 3.Db2+ Rg8 4.Db3+ Rh8 5.Dc3+ Rg8 6.Dc4+ Rh8 7.Dc3+ Rg8
>8.Dc4+ Rh8 9.Dc3+ Rg8
>  =  (0.03)   Profondeur: 14/23   00:00:02  552kN, tb=20065
>1.Da1+ Rg8 2.Da2+ Rh8 3.Db2+ Rg8 4.Db3+ Rh8 5.Dc3+ Rg8 6.Dc4+ Rh8 7.Dd4+ Rg8
>8.Dd5+ Rh8 9.Dh1+ Fh4 10.Da1+ Rg8 11.Da2+ Rh8 12.Db2+ Rg8 13.Db3+ Rh8 14.Dc3+
>Rg8 15.Dc4+
>  =  (0.06)   Profondeur: 15/40   00:00:03  972kN, tb=31201
>1.Da1+ Rg8 2.Da2+ Rh8 3.Db2+ Rg8 4.Db3+ Rh8 5.Dc3+ Rg8 6.Dc4+ Rh8 7.Dd4+ Rg8
>8.Dd5+ Rh8 9.Dh1+ Fh4 10.Da1+ Rg8 11.Da2+ Rh8 12.Db2+ Rg8 13.Db3+ Rh8 14.Dc3+
>Rg8 15.Dc4+
>  +-  (#21)   Profondeur: 16/16   00:00:05  1485kN, tb=41864
>1.Da1+ Rg8 2.Da2+ Rh8 3.Db2+ Rg8 4.Db3+ Rh8 5.Dc3+ Rg8 6.Dc4+ Rh8 7.Dd4+ Rg8
>8.Dd5+ Rh8 9.Dh1+ Fh4 10.Da1+ Rg8 11.Da2+ Rh8 12.Db2+ Rg8 13.Db3+ Rh8 14.Dc3+
>Rg8 15.Dc4+
>  +-  (#21)   Profondeur: 16/32   00:00:05  1519kN, tb=43581
>1.Da1+ Rg8 2.Da2+ Rh8 3.Db2+ Rg8 4.Db3+ Rh8 5.Dc3+ Rg8 6.Dc4+ Rh8 7.Dd4+ Rg8
>8.Dd5+ Rh8 9.Dh1+ Fh4 10.Da1+ Rg8 11.Da2+ Rh8 12.Db2+ Rg8 13.Db3+ Rh8 14.Dc3+
>Rg8 15.Dc4+
>  +-  (#21)   Profondeur: 17/35   00:00:07  2378kN, tb=55861
>1.Da1+ Rg8 2.Da2+ Rh8 3.Db2+ Rg8 4.Db3+ Rh8 5.Dc3+ Rg8 6.Dc4+ Rh8 7.Dd4+ Rg8
>8.Dd5+ Rh8 9.Dh1+ Fh4 10.Da1+ Rg8 11.Da2+ Rh8 12.Db2+ Rg8 13.Db3+ Rh8 14.Dc3+
>Rg8 15.Dc4+
>  +-  (#21)   Profondeur: 18/37   00:00:13  5171kN, tb=86564
>
>
>
>On November 10, 2003 at 06:08:45, K. Burcham wrote:
>
>>
>>
>>mate in 21. takes Shredder 7 over 13 minutes to find.
>>curious how long it takes CM9000 and Tiger 15.
>>
>>24/50	13:44 	  +M21	1.Qa1+ Kg8
>>Chessville weekly position of the week. mate in 21.
>>
>> [D] 5q1k/8/Q5K1/6p1/8/6b1/8/8 w - -
>>
>>Shredder 7
>>2150mhz AMD
>>192 hash
>>
>> 11/29	 0:00 	+0.03 	1.Qa1+ Kg8 2.Qa2+ Kh8 3.Qb2+ Kg8 4.Qb3+ Kh8 5.Qc3+ Kg8
>>6.Qc4+ Kh8 7.Qc3+ Kg8 8.Qc4+ Kh8 9.Qc3+ Kg8 (276.013) 315.4
>> 12/31	 0:01 	+0.03 	1.Qa1+ Kg8 2.Qa2+ Kh8 3.Qb2+ Kg8 4.Qb3+ Kh8 5.Qc3+ Kg8
>>6.Qc4+ Kh8 7.Qc3+ Kg8 8.Qc4+ Kh8 9.Qc3+ Kg8 (633.627) 440.6
>> 13/33	 0:02 	+0.06 	1.Qa1+ Kg8 2.Qa2+ Kh8 3.Qb2+ Kg8 4.Qb3+ Kh8 5.Qc3+ Kg8
>>6.Qc4+ Kh8 7.Qd4+ Kg8 8.Qd5+ Kh8 9.Qh1+ Bh4 10.Qa1+ Kg8 11.Qa2+ Kh8 12.Qb2+ Kg8
>>13.Qb3+ Kh8 14.Qb8 (1.209.684) 502.5
>> 14/35	 0:04 	+0.06 	1.Qa1+ Kg8 2.Qa2+ Kh8 3.Qb2+ Kg8 4.Qb3+ Kh8 5.Qc3+ Kg8
>>6.Qc4+ Kh8 7.Qd4+ Kg8 8.Qd5+ Kh8 9.Kxg5 (2.367.111) 563.0
>> 15/29	 0:04 	+6.00++	1.Qa1+ Kg8 2.Qa2+ Kh8 3.Qb2+ Kg8 4.Qb3+ Kh8 5.Qc3+ Kg8
>>6.Qc4+ Kh8 7.Qd4+ Kg8 8.Qd5+ Kh8 9.Qh1+ Bh4 10.Qa1+ Qf6+ 11.Kxf6 Bg3 (2.805.930)
>>568.2
>> 15/37	 0:06 	+6.00 	1.Qa1+ Kg8 2.Qa2+ Kh8 3.Qb2+ Kg8 4.Qb3+ Kh8 5.Qc3+ Kg8
>>6.Qc4+ Kh8 7.Qh4+ Bxh4 8.Kh5 (3.957.150) 600.1
>> 16/40	 0:10 	+6.01 	1.Qa1+ Kg8 2.Qa2+ Kh8 3.Qb2+ Kg8 4.Qb3+ Kh8 5.Qc3+ Kg8
>>6.Qc4+ Kh8 7.Qd4+ Kg8 8.Qd7 Qd6+ 9.Kh5 (6.828.234) 634.2
>> 17/42	 0:18 	+6.05 	1.Qa1+ Kg8 2.Qa2+ Kh8 3.Qb2+ Kg8 4.Qb3+ Kh8 5.Qc3+ Kg8
>>6.Qc4+ Kh8 7.Qd4+ Kg8 8.Qd5+ Kh8 9.Qh1+ Qh6+ 10.Kxh6 Kg8 (12.032.272) 649.2
>> 18/35	 0:21 	+6.30++	1.Qa1+ Kg8 2.Qa2+ Kh8 3.Qb2+ Kg8 4.Qb3+ Kh8 5.Qc3+ Kg8
>>6.Qc4+ Kh8 7.Qd4+ Qf6+ 8.Kxf6 g4 (13.788.831) 650.2
>> 18/44	 0:31 	+6.61 	1.Qa1+ Kg8 2.Qa2+ Kh8 3.Qb2+ Kg8 4.Qb3+ Kh8 5.Qc3+ Kg8
>>6.Qc4+ Kh8 7.Qd4+ Kg8 8.Qd5+ Kh8 9.Qh1+ Qh6+ 10.Kxh6 Kg8 (21.326.262) 676.6
>> 19/46	 0:53 	+6.65 	1.Qa1+ Kg8 2.Qa2+ Kh8 3.Qb2+ Kg8 4.Qb3+ Kh8 5.Qc3+ Kg8
>>6.Qc4+ Kh8 7.Qd4+ Kg8 8.Qd5+ Kh8 9.Qh1+ Qh6+ 10.Kxh6 Kg8 (37.202.427) 695.7
>> 20/38	 1:00 	+6.90++	1.Qa1+ Kg8 2.Qa2+ Kh8 3.Qb2+ Kg8 4.Qb3+ Kh8 5.Qc3+ Kg8
>>6.Qc4+ Kh8 7.Qd4+ Qf6+ 8.Kxf6 g4 (42.274.513) 696.0
>> 20/44	 1:01 	+7.40++	1.Qa1+ Kg8 2.Qa2+ Kh8 3.Qb2+ Kg8 4.Qb3+ Kh8 5.Qc3+ Kg8
>>6.Qc4+ Kh8 7.Qd4+ Qf6+ 8.Kxf6 g4 (42.484.167) 696.0
>> 20/48	 1:32 	+7.40 	1.Qa1+ Kg8 2.Qa2+ Kh8 3.Qb2+ Kg8 4.Qb3+ Kh8 5.Qc3+ Kg8
>>6.Qc4+ Kh8 7.Qd4+ Kg8 8.Qd5+ Kh8 9.Qh1+ Qh6+ 10.Kxh6 Kg8 (66.218.056) 715.3
>> 21/39	 1:44 	+7.65++	1.Qa1+ Kg8 2.Qa2+ Kh8 3.Qb2+ Kg8 4.Qb3+ Kh8 5.Qc3+ Kg8
>>6.Qc4+ Kh8 7.Qd4+ Qf6+ 8.Kxf6 Kg8 (74.534.476) 714.6
>> 21/46	 1:44 	+8.15++	1.Qa1+ Kg8 2.Qa2+ Kh8 3.Qb2+ Kg8 4.Qb3+ Kh8 5.Qc3+ Kg8
>>6.Qc4+ Kh8 7.Qd4+ Qf6+ 8.Kxf6 Kg8 (74.785.807) 714.6
>> 21/50	 2:33 	+8.15 	1.Qa1+ Kg8 2.Qa2+ Kh8 3.Qb2+ Kg8 4.Qb3+ Kh8 5.Qc3+ Kg8
>>6.Qc4+ Kh8 7.Qd4+ Kg8 8.Qd5+ Kh8 9.Qh1+ Qh6+ 10.Kxh6 Kg8 (111.249.184) 727.1
>> 22/40	 2:51 	+8.40++	1.Qa1+ Kg8 2.Qa2+ Kh8 3.Qb2+ Kg8 4.Qb3+ Kh8 5.Qc3+ Kg8
>>6.Qc4+ Kh8 7.Qd4+ Qf6+ 8.Kxf6 Kg8 (124.579.085) 726.1
>> 22/41	 2:51 	+8.90++	1.Qa1+ Kg8 2.Qa2+ Kh8 3.Qb2+ Kg8 4.Qb3+ Kh8 5.Qc3+ Kg8
>>6.Qc4+ Kh8 7.Qd4+ Qf6+ 8.Kxf6 Kg8 (124.782.358) 726.0
>> 22/52	 4:19 	+8.90 	1.Qa1+ Kg8 2.Qa2+ Kh8 3.Qb2+ Kg8 4.Qb3+ Kh8 5.Qc3+ Kg8
>>6.Qc4+ Kh8 7.Qd4+ Kg8 8.Qd5+ Kh8 9.Qh1+ Qh6+ 10.Kxh6 Kg8 (192.094.388) 739.3
>> 23/46	 4:51 	+9.15++	1.Qa1+ Kg8 2.Qa2+ Kh8 3.Qb2+ Kg8 4.Qb3+ Kh8 5.Qc3+ Kg8
>>6.Qc4+ Kh8 7.Qd4+ Qf6+ 8.Kxf6 Kg8 (215.554.505) 738.4
>> 23/50	 4:52 	+9.65++	1.Qa1+ Kg8 2.Qa2+ Kh8 3.Qb2+ Kg8 4.Qb3+ Kh8 5.Qc3+ Kg8
>>6.Qc4+ Kh8 7.Qd4+ Qf6+ 8.Kxf6 Kg8 (215.779.369) 738.3
>> 23/54	 7:13 	+9.65 	1.Qa1+ Kg8 2.Qa2+ Kh8 3.Qb2+ Kg8 4.Qb3+ Kh8 5.Qc3+ Kg8
>>6.Qc4+ Kh8 7.Qd4+ Kg8 8.Qd5+ Kh8 9.Qh1+ Bh4 10.Qa1+ Kg8 11.Qa2+ Kh8 12.Qb2+ Qf6+
>>13.Kxf6 Kg8 (324.432.553) 747.8
>> 24/42	 8:07 	+9.90++	1.Qa1+ Kg8 2.Qa2+ Kh8 3.Qb2+ Kg8 4.Qb3+ Kh8 5.Qc3+ Kg8
>>6.Qc4+ Kh8 7.Qd4+ Qf6+ 8.Kxf6 Kg8 (363.833.652) 747.0
>> 24/50	 8:11 	+10.40++	1.Qa1+ Kg8 2.Qa2+ Kh8 3.Qb2+ Kg8 4.Qb3+ Kh8 5.Qc3+ Kg8
>>6.Qc4+ Kh8 7.Qd4+ Qf6+ 8.Kxf6 Kg8 (367.584.353) 747.3
>> 24/50	13:44 	  +M21	1.Qa1+ Kg8 2.Qa2+ Kh8 3.Qb2+ Kg8 4.Qb3+ Kh8 5.Qc3+ Kg8
>>6.Qc4+ Kh8 7.Qd4+ Kg8 8.Qd5+ Kh8 9.Qh1+ Bh4 10.Qa1+ Kg8 11.Qa2+ Kh8 12.Qb2+ Qf6+
>>13.Kxf6 Kg8 (623.775.190) 756.2
>>best move: Qa6-a1 time: 15:17.766 min  n/s: 754.192  CPU 97.8%  nodes:
>>692.172.457 TB: 2.312.266



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