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Subject: Re: White to Move !!

Author: Ernst Walet

Date: 12:14:04 10/28/02

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On October 28, 2002 at 13:23:56, Ernst Walet wrote:

>On October 26, 2002 at 13:09:03, Terry Ripple wrote:
>
>>On October 26, 2002 at 11:35:18, Mustafa wrote:
>>
>>>here chess tiger 14 played a strong move it sacrificed the rook to get the win
>>>here it's the position can ur program find this.
>>>[D]4r3/3brk1p/5pp1/1p1p4/p1qP1NPP/2P1RP2/1PQ3K1/4R3 w - - 0 35
>>>
>>>Chess Tiger 14 v's Chessica 2
>>-----------------------------
>>Using only a AMD K6-2, 266 Mhz, 64 Ram! Hiarcs 8 finds it using such a slow pc!
>>
>>New position
>>4r3/3brk1p/5pp1/1p1p4/p1qP1NPP/2P1RP2/1PQ3K1/4R3 w - - 0 1
>>
>>Analysis by Hiarcs 8:
>>
>>1.Rxe7+ Rxe7 2.Rxe7+ Kxe7
>>  ²  (0.29)   depth: 1   00:00:00
>>1.Rxe7+ Rxe7 2.Rxe7+ Kxe7
>>  ²  (0.29)   depth: 2/10   00:00:00
>>1.Rxe7+ Rxe7
>>  ²  (0.54)   depth: 3/11   00:00:00
>>1.Rxe7+ Rxe7 2.Rxe7+ Kxe7 3.h5 a3 4.bxa3
>>  ±  (1.07)   depth: 3/16   00:00:00
>>1.Rxe7+ Rxe7
>>  ±  (1.35)   depth: 4/16   00:00:00
>>1.Rxe7+ Rxe7 2.Rxe7+ Kxe7 3.h5 gxh5 4.Qxh7+
>>  +-  (1.53)   depth: 4/20   00:00:00
>>1.Rxe7+ Rxe7
>>  ±  (1.27)   depth: 5/20   00:00:00  5kN
>>1.Rxe7+ Rxe7 2.Rxe7+ Kxe7 3.h5 Be8
>>  ±  (1.00)   depth: 5/21   00:00:00  11kN
>>1.Rxe7+ Rxe7 2.Rxe7+ Kxe7 3.h5 Be8 4.Kg1 a3 5.bxa3
>>  ±  (1.23)   depth: 6/24   00:00:01  27kN
>>1.Rxe7+ Rxe7
>>  ±  (0.98)   depth: 7/24   00:00:02  62kN
>>1.Rxe7+ Rxe7 2.Rxe7+ Kxe7 3.h5 Be8 4.Kf2 b4 5.Qe2+ Qxe2+ 6.Kxe2 a3 7.hxg6 hxg6
>>8.bxa3 bxa3 9.Nxd5+ Ke6
>>  ²  (0.57)   depth: 7/29   00:00:04  102kN
>>1.Rxe7+ Rxe7
>>  ²  (0.32)   depth: 8/29   00:00:10  269kN
>>1.Rxe7+ Rxe7 2.Rxe7+ Kxe7 3.h5 Be8 4.Qc1 Kf7 5.Qb1 Kg7
>>  ²  (0.31)   depth: 8/30   00:00:11  296kN
>>1.Rxe7+ Rxe7 2.Rxe7+ Kxe7 3.h5 Be8 4.Kf2 b4 5.Qe2+ Qxe2+ 6.Kxe2 a3 7.bxa3 Bb5+
>>8.Ke3 bxa3 9.Nxd5+ Ke6
>>  ²  (0.41)   depth: 9/30   00:00:29  760kN
>>1.Rxe7+ Rxe7 2.Rxe7+ Kxe7 3.h5 Be8 4.Kf2 b4 5.Qe2+ Qxe2+ 6.Kxe2 a3 7.bxa3 bxa3
>>8.Nxd5+ Ke6 9.Nc7+ Kd7
>>  ²  (0.55)   depth: 10/32   00:01:15  2003kN
>>1.Rxe7+ Rxe7 2.Rxe7+ Kxe7 3.h5 Be8 4.Kf2 b4 5.Qe2+ Qxe2+ 6.Kxe2 a3 7.bxa3 bxa3
>>8.Nxd5+ Kf7 9.Nb4 Bb5+ 10.Kd2
>>  ²  (0.48)   depth: 11/35   00:03:17  5261kN
>>1.h5 Rxe3
>>  ±  (0.80)   depth: 11/37   00:05:41  8806kN
>>1.h5 Rxe3 2.hxg6+ Kg7 3.gxh7 f5 4.Rxe3 Rxe3 5.gxf5 Re8 6.f6+ Kxf6 7.Qg6+ Ke7
>>8.Qg7+ Kd6 9.h8Q Rxh8 10.Qxh8
>>  +-  (1.51)   depth: 11/37   00:07:13  10867kN
>>1.h5 Rxe3 2.hxg6+ Kg7 3.gxh7 f5 4.Rxe3 Rxe3 5.gxf5 Re8 6.f6+ Kxf6
>>  +-  (1.51)   depth: 12/41   00:11:24  16416kN
>>
>>Regards,
>>      Terry
>
>

And somewhat faster hardware, and same hashtable size...

New game
4r3/3brk1p/5pp1/1p1p4/p1qP1NPP/2P1RP2/1PQ3K1/4R3 w - - 0 1

Analysis by Hiarcs 8:

1.Rxe7+ Rxe7 2.Rxe7+ Kxe7
  ²  (0.29)   Depth: 1   00:00:00
1.Rxe7+ Rxe7 2.Rxe7+ Kxe7
  ²  (0.29)   Depth: 2/10   00:00:00
1.Rxe7+ Rxe7
  ²  (0.54)   Depth: 3/11   00:00:00
1.Rxe7+ Rxe7 2.Rxe7+ Kxe7 3.h5 a3 4.bxa3
  ±  (1.07)   Depth: 3/16   00:00:00
1.Rxe7+ Rxe7
  ±  (1.35)   Depth: 4/16   00:00:00
1.Rxe7+ Rxe7 2.Rxe7+ Kxe7 3.h5 gxh5 4.Qxh7+
  +-  (1.53)   Depth: 4/20   00:00:00
1.Rxe7+ Rxe7
  ±  (1.27)   Depth: 5/20   00:00:00  5kN
1.Rxe7+ Rxe7 2.Rxe7+ Kxe7 3.h5 Be8
  ±  (1.00)   Depth: 5/21   00:00:00  11kN
1.Rxe7+ Rxe7 2.Rxe7+ Kxe7 3.h5 Be8 4.Kg1 a3 5.bxa3
  ±  (1.23)   Depth: 6/24   00:00:00  27kN
1.Rxe7+ Rxe7
  ±  (0.98)   Depth: 7/24   00:00:00  62kN
1.Rxe7+ Rxe7 2.Rxe7+ Kxe7 3.h5 Be8 4.Kf2 b4 5.Qe2+ Qxe2+ 6.Kxe2 a3 7.hxg6 hxg6
8.bxa3 bxa3 9.Nxd5+ Ke6
  ²  (0.57)   Depth: 7/29   00:00:00  102kN
1.Rxe7+ Rxe7
  ²  (0.32)   Depth: 8/29   00:00:01  269kN
1.Rxe7+ Rxe7 2.Rxe7+ Kxe7 3.h5 Be8 4.Qc1 Kf7 5.Qb1 Kg7
  ²  (0.31)   Depth: 8/30   00:00:01  296kN
1.Rxe7+ Rxe7 2.Rxe7+ Kxe7 3.h5 Be8 4.Kf2 b4 5.Qe2+ Qxe2+ 6.Kxe2 a3 7.bxa3 Bb5+
8.Ke3 bxa3 9.Nxd5+ Ke6
  ²  (0.41)   Depth: 9/30   00:00:04  760kN
1.Rxe7+ Rxe7 2.Rxe7+ Kxe7 3.h5 Be8 4.Kf2 b4 5.Qe2+ Qxe2+ 6.Kxe2 a3 7.bxa3 bxa3
8.Nxd5+ Ke6 9.Nc7+ Kd7
  ²  (0.55)   Depth: 10/32   00:00:12  2001kN
1.Rxe7+ Rxe7 2.Rxe7+ Kxe7 3.h5 Be8 4.Kf2 b4 5.Qe2+ Qxe2+ 6.Kxe2 a3 7.bxa3 bxa3
8.Nxd5+ Kf7 9.Nb4 Bb5+ 10.Kd2
  ²  (0.48)   Depth: 11/35   00:00:30  5188kN
1.h5 Rxe3
  ±  (0.80)   Depth: 11/37   00:00:45  7469kN
1.h5 Rxe3 2.hxg6+ Kg7 3.gxh7 f5 4.Rxe3 Rxe3 5.gxf5 Kh8 6.f6 Be8 7.Qd2
  +-  (1.41)   Depth: 11/37   00:00:57  9287kN
1.h5 Rxe3 2.hxg6+ Kg7 3.gxh7 f5 4.Rxe3 Rxe3 5.gxf5 Re8 6.f6+ Kxf6
  +-  (1.51)   Depth: 12/42   00:01:31  14174kN
1.h5 Rxe3 2.hxg6+ Kg7 3.gxh7 f5 4.Rxe3 Rxe3 5.gxf5 Re8 6.f6+ Kxf6 7.Qg6+
  +-  (1.52)   Depth: 13/42   00:03:22  31277kN
1.h5 Rxe3 2.hxg6+ Kg7 3.gxh7 f5 4.Rxe3 Rxe3 5.gxf5 Re8 6.f6+ Kxf6 7.Qg6+ Ke7
8.Qxe8+ Bxe8 9.h8Q Bf7 10.Qe5+ Kd7 11.Qf5+ Ke8
  +-  (1.69)   Depth: 14/44   00:09:58  93478kN
1.h5 Rxe3 2.hxg6+ Kg7 3.gxh7 f5 4.Rxe3 Rxe3 5.gxf5 Re8 6.f6+ Kxf6 7.Qg6+ Ke7
8.Qxe8+ Bxe8 9.h8Q Bf7 10.Qe5+ Kd7 11.Qf6 Ke8
  +-  (1.75)   Depth: 15/47   00:39:34  381662kN

(Athlon 4 XP1500+, 64MB hash 28.10.2002)


Ernst.



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