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Subject: Difficult test position

Author: Steffen Basting

Date: 06:55:33 05/27/03


Hi!

Here's a position that occured in one of my games:

[D] 5r1k/p5b1/4n1qp/2p1pr1n/2PpN1pP/P2P2P1/1RQ1RPK1/2B3N1 b - - 0 31

How long does your engine need to find Nef4+?
Fritz 8 needs about 4 minutes on my PIV/3.06:


5r1k/p5b1/4n1qp/2p1pr1n/2PpN1pP/P2P2P1/1RQ1RPK1/2B3N1 b - - 0 1

Analysis by Fritz 8:

31...T5f7 32.Tb5 Sf6 33.Sxc5 Sxc5 34.Txc5 Sd7 35.Tc7
  ³  (-0.34)   Tiefe: 7/21   00:00:00  104kN
31...T5f7 32.Tb5 Sf6 33.Sxc5 Sxc5 34.Txc5 Sd7 35.Tc7 a6
  ³  (-0.38)   Tiefe: 8/22   00:00:00  168kN
31...T5f7 32.Da4 Sf6 33.Dc6 Sxe4 34.Dxe4 Tf5 35.Tb7 Df6 36.Dxg4 Txf2+
  ³  (-0.53)   Tiefe: 9/26   00:00:00  406kN
31...T5f7 32.Te1 Sf6 33.De2 Dh5 34.Sd6 Td7 35.Se4 Sxe4 36.Dxe4 Lf6 37.Se2
  ³  (-0.50)   Tiefe: 10/29   00:00:01  934kN
31...T5f7 32.Te1 Sf6 33.De2 Dh5 34.Sd6 Td7 35.Se4 Sxe4 36.Dxe4 Tdf7 37.Dd5
  ³  (-0.47)   Tiefe: 11/31   00:00:02  2214kN
31...T5f7 32.Te1 Sf6 33.De2 Dh5 34.Sd6 Td7 35.Se4 Sxe4 36.Dxe4 Tdf7 37.Dd5
  ³  (-0.47)   Tiefe: 12/34   00:00:04  4079kN
31...T5f7 32.Te1 Sf6 33.De2 Dh5 34.Sd2 Te8 35.f3 Dg6 36.Se4 Tef8 37.Sd6 Te7
  ³  (-0.44)   Tiefe: 13/32   00:00:07  8421kN
31...T5f7 32.Te1 Sf6 33.De2 Dh5 34.Sd2 Te8 35.Se4 Sxe4 36.Dxe4 Tef8 37.Dd5
  ³  (-0.38)   Tiefe: 14/34   00:00:17  18603kN
31...T5f7 32.Te1 Sf6 33.De2 Kh7 34.Sd6 Te7 35.Se4 Kg8 36.Sxf6+ Lxf6 37.De4 Dh5
38.f3
  ³  (-0.41)   Tiefe: 15/38   00:01:22  94121kN
31...T5f7 32.Te1 Sf6 33.De2 Kh7 34.Sd6 Te7 35.Se4 Kg8 36.Sxf6+ Lxf6 37.De4 Dh5
38.f3 Tg7 39.Dd5 gxf3+
  ³  (-0.34)   Tiefe: 16/39   00:02:14  157275kN
31...Sef4+!
  ³  (-0.38)   Tiefe: 16/43   00:04:04  286586kN
31...Sef4+!
  ³  (-0.53)   Tiefe: 16/43   00:04:21  308445kN
31...Sef4+!
  µ  (-0.81)   Tiefe: 17/43   00:06:23  453558kN
31...Sef4+ 32.gxf4 exf4 33.Kf1 f3 34.Te1 g3
  µ  (-0.81)   Tiefe: 18/45   00:12:05  868379kN
31...Sef4+!
  µ  (-1.09)   Tiefe: 19/50   00:32:40  2308018kN

I'm especially interested in amateur engines' results :-)

Regards,
Steffen



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