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Subject: Re: A test position for chess programs

Author: Dieter Buerssner

Date: 12:36:30 12/10/00

Go up one level in this thread


On December 10, 2000 at 11:17:58, Uri Blass wrote:

>b7/1q2p2k/3p1p1p/1Pr1nP2/6PP/1rN5/2RKBQ2/2R5 b - - 0 1
>
>This position is from Fritz-Gambittiger.
>
>The target is to find Rd5+ that is winning.
>
>How much time does your program need to find Rd5+?

Yace on AMD K6-2 475 needs 141 seconds. The score only rises slowly
after this.

  15228130 80.89   1.01  9t : 1...Nc4+ 2.Bxc4 Rxc4 3.g5 fxg5 4.hxg5 hxg5 5.Rg1
                              Rf4 6.Qe3 Rxf5 7.Rxg5 Rxg5 8.Qxg5 {90}
  27888566 141.0   1.02  9t+: 1...Rd5+ 2.Nxd5 Qxd5+ 3.Ke1 Rh3 4.Rc3 Rh1+ 5.Bf1
                              Nd3+ 6.Rxd3 Qxd3 7.Qg1 Rxg1 8.b6 {1001}
  29784391 151.1   1.17  9t : 1...Rd5+ 2.Nxd5 Qxd5+ 3.Ke1 Rh3 4.Rc3 Rh1+ 5.Bf1
                              Nd3+ 6.Rxd3 Qxd3 7.Qe2 Qg3+ 8.Qf2 Qe5+ 9.Kd1
                              Qxb5 10.Ke1 {80}
  29809414 151.2   1.17  9. : 1...Rd5+ 2.Nxd5 Qxd5+ 3.Ke1 Rh3 4.Rc3 Rh1+ 5.Bf1
                              Nd3+ 6.Rxd3 Qxd3 7.Qe2 Qg3+ 8.Qf2 Qe5+ 9.Kd1
                              Qxb5 10.Ke1 {80}
  38830457 193.0   1.21 10t : 1...Rd5+ 2.Ke1 Rd3 3.Qf1 Nf3+ 4.Bxf3 Qxf3 5.Qxf3
                              Bxf3 6.g5 hxg5 7.hxg5 fxg5 8.Rh2+ Kg8 {90}
  58325176 282.5   1.21 10. : 1...Rd5+ 2.Ke1 Rd3 3.Qf1 Nf3+ 4.Bxf3 Qxf3 5.Qxf3
                              Bxf3 6.g5 hxg5 7.hxg5 fxg5 8.Rh2+ Kg8 {90}
  71092682 348.4   1.30 11t : 1...Rd5+ 2.Ke1 Rd3 3.Qf1 Nf3+ 4.Bxf3 Qxf3 5.Qxf3
                              Bxf3 6.g5 hxg5 7.hxg5 fxg5 8.Rh2+ Kg8 9.Rhc2 {90}
 123099344 588.3   1.30 11. : 1...Rd5+ 2.Ke1 Rd3 3.Qf1 Nf3+ 4.Bxf3 Qxf3 5.Qxf3
                              Bxf3 6.g5 hxg5 7.hxg5 fxg5 8.Rh2+ Kg8 9.Rhc2 {90}

Regards,
Dieter



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