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Subject: Re: Position

Author: Timothy J. Frohlick

Date: 10:06:04 06/18/02

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Ernst,

Hiarcs finds a mate in 11.

Hiarcs 8 - Frohlick,T
4r1k1/qp1r1p2/2pb1Bp1/p6p/2PP1n1R/1P3P2/P4P2/2Q2K1R w - - 0 1

Analysis by Hiarcs 8:

1.Rxf4 Bxf4 2.Qxf4
  -+  (-2.25)   Depth: 1   00:00:00
1.Rxf4 Bxf4 2.Qxf4
  -+  (-2.25)   Depth: 2/7   00:00:00
1.Rxf4 Bxf4 2.Qxf4
  -+  (-2.25)   Depth: 3/11   00:00:00
1.Rxf4 Re6 2.Be5 Bxe5 3.dxe5 Rxe5
  -+  (-2.19)   Depth: 4/11   00:00:00
1.Rxf4 Bxf4 2.Qxf4 Re6 3.Kg2 Rdd6 4.Be5
  -+  (-2.27)   Depth: 5/13   00:00:00  6kN
1.Qxf4 Re2
  -+  (-1.87)   Depth: 5/14   00:00:00  9kN
1.Qxf4 Bxf4 2.Rxh5 Re1+ 3.Kxe1 Bd2+ 4.Kf1 gxh5 5.Rxh5 Bh6 6.Rxh6
  µ  (-1.20)   Depth: 5/16   00:00:00  13kN
1.Qxf4 Re1+
  µ  (-0.91)   Depth: 6/19   00:00:00  21kN
1.Qxf4 Re1+ 2.Kxe1 Bxf4 3.Rxh5 gxh5 4.Rxh5 Re7+ 5.Kf1
  ±  (1.16)   Depth: 6/20   00:00:00  61kN
1.Qxf4 Bxf4 2.Rxh5 gxh5
  ±  (1.16)   Depth: 7/20   00:00:00  90kN
1.Qxf4 Qa6
  +-  (1.41)   Depth: 8/22   00:00:01  173kN
1.Qxf4 Bxf4 2.Rxh5 gxh5 3.Rxh5 Re1+ 4.Kxe1 Re7+ 5.Kd1 Qxd4+ 6.Bxd4 f6 7.Bxf6
Rd7+ 8.Ke1
  +-  (2.75)   Depth: 8/26   00:00:02  287kN
1.Qxf4 Be7
  +-  (3.00)   Depth: 9/26   00:00:04  633kN
1.Qxf4 Re1+ 2.Kxe1 Qxd4 3.Qxd4 Bb4+ 4.Ke2 Rxd4 5.Rxd4 Kh7
  +-  (12.94)   Depth: 9/33   00:01:09  10230kN
1.Qxf4 Re1+
  +-  (13.19)   Depth: 10/33   00:01:25  12578kN
1.Qxf4 Re1+ 2.Kg2 Qxd4 3.Qxd4 Rxh1 4.Rxh1 b5 5.Qg4
  +-  (13.69)   Depth: 10/34   00:01:54  17292kN
1.Rxh5 gxh5 2.Qxf4 Re1+ 3.Kxe1 Bb4+ 4.Kf1 Rxd4 5.Bxd4 f6 6.Bxa7 Kf7 7.Qf5 Kg7
8.Rg1+ Kf7 9.Qxh5+ Kf8
  +-  (19.88)   Depth: 10/37   00:02:20  22642kN
1.Rxh5 gxh5
  +-  (20.13)   Depth: 11/37   00:02:27  24102kN
1.Rxh5 gxh5 2.Qxf4 Bf8 3.Rxh5 Bh6 4.Qxh6 Re1+ 5.Kxe1 Qxd4 6.Qg5+ Kf8 7.Bxd4 Re7+
8.Kf1 f5 9.Qxf5+ Kg8 10.Qg5+ Kf8 11.Qf6+
  +-  (#18)   Depth: 11/39   00:03:12  34667kN
1.Rxh5 Re1+ 2.Kxe1 gxh5 3.Qxf4
  +-  (#11)   Depth: 11/39   00:05:06  79299kN

(Frohlick, Albuquerque 18.06.2002)

I find it interesting that Sjeng never even considered Qxf4 as a good sacrifice.
Must be a bug in the program.

Tim Frohlick


On June 18, 2002 at 12:57:08, Ernst Walet wrote:

>On June 18, 2002 at 12:30:13, Charlie GOLD wrote:
>
>>    Here is a position that I gave to Fritz 6. After 7 minutes on infinite it
>>only comes up with Rxf4. I believe that Rxh5 leads to a win.
>>    [D] 4r1k1/qp1r1p2/2pb1Bp1/p6p/2PP1n1R/1P3P2/P4P2/2Q2K1R w 0 1
>
>Fritz7 finds a mate......
>
>New game
>4r1k1/qp1r1p2/2pb1Bp1/p6p/2PP1n1R/1P3P2/P4P2/2Q2K1R w - - 0 1
>
>Analysis by Fritz 7:
>
>1.Rxf4 Re6 2.Rf5 Be7 3.Bxe7 Qxd4 4.Rxa5 Rdxe7 5.Qg5 Re2 6.Ra8+ Kg7
>  µ  (-1.16)   Depth: 9/25   00:00:00  404kN
>1.Rxf4 Re6 2.d5 cxd5 3.cxd5 Rc7 4.Qd1 Bxf4 5.dxe6 fxe6 6.Qd8+ Kf7
>  µ  (-0.94)   Depth: 10/29   00:00:01  981kN
>1.Rxh5!
>  µ  (-0.91)   Depth: 10/30   00:00:07  4442kN
>1.Rxh5!
>  µ  (-0.75)   Depth: 10/31   00:00:08  5140kN
>1.Rxh5!
>  ³  (-0.44)   Depth: 10/31   00:00:09  5757kN
>1.Rxh5!
>  =  (0.19)   Depth: 10/31   00:00:11  6781kN
>1.Rxh5 Re1+ 2.Qxe1 Nxh5 3.Qe8+ Bf8 4.Rxh5 gxh5 5.Qxd7 Qb8 6.Be5 Qa8
>  ±  (0.81)   Depth: 10/34   00:00:21  12383kN
>1.Rxh5 gxh5 2.Qxf4 Re1+ 3.Kxe1
>  ±  (0.72)   Depth: 11/32   00:00:25  14880kN
>1.Qxf4!
>  ±  (0.75)   Depth: 11/32   00:00:28  16200kN
>1.Qxf4!
>  ±  (0.91)   Depth: 11/32   00:00:29  17066kN
>1.Qxf4!
>  ±  (1.22)   Depth: 11/32   00:00:31  18113kN
>1.Qxf4!
>  +-  (1.84)   Depth: 11/32   00:00:33  19403kN
>1.Qxf4 Re1+ 2.Kg2 Rg1+ 3.Kxg1 Qc5 4.Qh6
>  +-  (14.88)   Depth: 11/35   00:02:50  97218kN
>1.Qxf4!
>  +-  (15.16)   Depth: 12/32   00:03:14  110688kN
>1.Qxf4!
>  +-  (15.44)   Depth: 13/33   00:03:50  131691kN
>1.Qxf4!
>  +-  (15.72)   Depth: 13/33   00:04:06  140881kN
>1.Qxf4!
>  +-  (16.28)   Depth: 13/33   00:04:20  148608kN
>1.Qxf4 Qxd4 2.Rxh5 Re1+
>  +-  (#15)   Depth: 13/38   00:06:51  235771kN
>1.Qxf4 Qxd4 2.Rxh5 Re1+
>  +-  (#15)   Depth: 13/38   00:07:00  240357kN
>
>(Celeron 1200, 832MB hash, 3+4+5 EGTB's 18.06.2002)
>
>
>Ernst.



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