Author: John Merlino
Date: 14:43:35 04/18/03
Go up one level in this thread
On April 18, 2003 at 17:35:25, Dieter Buerssner wrote:
>On April 18, 2003 at 15:46:04, Jorge Pichard wrote:
>
>> 8/6Q1/8/1R5p/8/4r3/8/1K1kq3 w - - 0 1
>
>Yace does not find a mate within an hour, but at least a rather convincing
>score:
>
>[nodes time score depth]
> 90238839 1:56.1 0.00 11. 1. Qg2 Re2 2. Qd5+ Rd2 3. Qxh5+ Qe2 4. Qxe2+
> {EGTB} 4...Rxe2 5. Rc5 Rf2 6. Rd5+ Rd2 7. Re5
> Re2 8. Rf5 Rg2 9. Rh5 Rg3 10. Rh6 Rg4 11. Rh7
> Rg5 12. Rh8 Rg6 13. Rf8 Rh6 14. Rg8 Rh7 15. Rf8
> Rg7 16. Rh8 Rf7 17. Rg8 Rh7 18. Rf8 Rg7 19. Rh8
> Rf7 20. Rg8 Rh7 {repetition} {0}
> 106141646 2:26.1 0.01 12t 1. Qg2 Re2 2. Rd5+ Rd2 3. Rd8 {HT}
> 328388697 7:35.7 0.01 12. 1. Qg2 Re2 2. Rd5+ Rd2 3. Rd8
> 341239835 7:55.1 0.41 13++ 1. Qg2 Re2 2. Rd5+ Rd2 3. Rd8 Qe2 4. Qh1+ Qe1
> 5. Qxh5+ Qe2 6. Qh1+ Qe1 7. Qf3+ Qe2 8. Qc6 Qe3
> 9. Qa4+ Ke2 10. Re8 Rd4 11. Rxe3+ Kd2 12. Qa2+
> Kxe3 {501}
> 343566389 7:58.0 1.41 13++ 1. Qg2 Re2 2. Rd5+ Rd2 3. Rd8 h4 4. Qg4+ Qe2 5.
> Qa4+ Ke1 6. Qxh4+ Kd1 7. Qh1+ Qe1 8. Qf3+ Qe2
> 9. Qc6 Qe3 10. Qa4+ Ke2 11. Re8 Rd4 12. Rxe3+
> Kf2 13. Qa2+ Kxe3 {501}
> 345247243 8:00.9 6.41 13++ 1. Qg2 Re2 2. Rd5+ Rd2 3. Rd8 h4 4. Qg4+ Qe2 5.
> Qa4+ Ke1 6. Qxh4+ Kd1 7. Qh1+ Qe1 8. Qf3+ Qe2
> 9. Qc6 Qe3 10. Qa4+ Ke2 11. Re8 Rd4 12. Rxe3+
> Kf2 13. Qa2+ Kf1 {1001}
> 353650188 8:12.2 9.95 13t 1. Qg2 Re2 2. Rd5+ Rd2 3. Rd8 h4 4. Qg4+ Qe2 5.
> Qa4+ Ke1 6. Qxh4+ Kd1 7. Qh1+ Qe1 8. Qf3+ Qe2
> 9. Qc6 Qe3 10. Qa4+ Ke2 11. Re8 Kf2 12. Rxe3
> Kg1 13. Qc2 Rd8 {HT}
> 934614742 20:41.5 9.95 13. 1. Qg2 Re2 2. Rd5+ Rd2 3. Rd8 h4 4. Qg4+ Qe2 5.
> Qa4+ Ke1 6. Qxh4+ Kd1 7. Qh1+ Qe1 8. Qf3+ Qe2
> 9. Qc6 Qe3 10. Qa4+ Ke2 11. Re8 Kf2 12. Rxe3
> Kg1 13. Qc2 Rd8
> 948156524 20:59.9 10.35 14++ 1. Qg2 Re2 2. Rd5+ Rd2 3. Rd8 h4 4. Qg4+ Qe2 5.
> Qa4+ Ke1 6. Qxh4+ Kd1 7. Qh1+ Qe1 8. Qf3+ Qe2
> 9. Qc6 Qe3 10. Qa4+ Ke2 11. Re8 Rc2 12. Rxe3+
> Kd1
> 948446295 21:00.4 11.35 14++ 1. Qg2 Re2 2. Rd5+ Rd2 3. Rd8 h4 4. Qg4+ Qe2 5.
> Qa4+ Ke1 6. Qxh4+ Kd1 7. Qh1+ Qe1 8. Qf3+ Qe2
> 9. Qc6 Qe3 10. Qa4+ Ke2 11. Re8 Rb2+ 12. Kxb2
> Kd3 13. Rxe3+ Kd2
> 949512300 21:02.0 16.35 14++ 1. Qg2 Re2 2. Rd5+ Rd2 3. Rd8 h4 4. Qg4+ Qe2 5.
> Qa4+ Ke1 6. Qxh4+ Kd1 7. Qh1+ Qe1 8. Qf3+ Qe2
> 9. Qc6 Qe3 10. Qa4+ Ke2 11. Re8 Rb2+ 12. Kxb2
> Kd3 13. Rxe3+ Kd2
> 984626898 21:47.3 18.97 14t 1. Qg2 Re2 2. Rd5+ Rd2 3. Rd8 h4 4. Qg4+ Qe2 5.
> Qa4+ Ke1 6. Qxh4+ Kd1 7. Qh1+ Qe1 8. Qf3+ Qe2
> 9. Qc6 Qe1 10. Qc1+ Ke2 11. Re8+ Kf3 12. Rxe1
> Rd8 13. Qd1+ Kf4 14. Qxd8 Kf5 {1501}
>
>
>With such a good score, Yace will also not try hard to find a mate (it tries
>hard to find a good move for the losing side, instead).
>
>Regards,
>Dieter
Actually, with Yace's final PV, should it have been able to give a mating result
based on tablebases? There are only four pieces on the board after 14.Qxd8 in
the last PV.
From what I can tell, I THINK White has a mate in about 45-50 moves from the
initial position.
jm
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