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Subject: Re: Find the nice win with your engine

Author: Dieter Buerssner

Date: 14:00:08 08/25/03

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On August 25, 2003 at 14:18:56, Mihaly Szalai wrote:

>I'm quite interested how does other engines fare on your power computers.

>2R3R1/7k/3K3p/7p/3p4/4p3/6P1/4q3 w - - 0 1

Not as fast as Knightdreamer, but still not bad. Yace on P4 2.53 GHz finds Ke6
immediately with slightly positive score, but needs a while, to get a winning
score:


    196058   0.208   0.46  8t  1. Ke6 h4 2. Rgf8 Kg6 3. Rf6+ Kh5 4. Rg8 Qb1 5.
                               Rf5+ Qxf5+ 6. Kxf5 d3H 7. Ke4H {260}
    239287   0.249   0.46  8.  1. Ke6 h4 2. Rgf8 Kg6 3. Rf6+ Kh5 4. Rg8 Qb1 5.
                               Rf5+ Qxf5+ 6. Kxf5 d3 7. Ke4 {260}
    821651   0.882   0.47  9t  1. Ke6 h4 2. Rgd8 Kg6 3. Rd7 Kh5 4. Rg8 Qa5 5.
                               Rd5+ Qxd5+ 6. Kxd5 d3 7. Re8 d2 8. Re5+ Kg4H
                               {260}
   1020920   1.065   0.47  9.  1. Ke6 h4 2. Rgd8 Kg6 3. Rd7 Kh5 4. Rg8 Qa5 5.
                               Rd5+ Qxd5+ 6. Kxd5 d3 7. Re8 d2 8. Re5+ Kg4
                               {260}
   2574601   2.600   0.57 10t  1. Ke6 h4 2. Rgf8 Qg3 3. Rf7+ Qg7 4. Rcc7 Qxf7+
                               5. Kxf7 d3 6. Kf6+ Kg8H 7. Kg6H Kf8H 8. Rf7+H
                               Ke8H {260}
   3527175   3.546   0.57 10.  1. Ke6 h4 2. Rgf8 Qg3 3. Rf7+ Qg7 4. Rcc7 Qxf7+
                               5. Kxf7 d3 6. Kf6+ Kg8 7. Kg6 Kf8 8. Rf7+ Ke8
                               {260}
   6288305   6.209   0.74 11t  1. Ke6 h4 2. Rgf8 Qg3 3. Rf7+ Qg7 4. Rcc7 Qxf7+
                               5. Kxf7 d3 6. Kf6+ Kg8 7. Kg6 Kf8 8. Kxh6 e2 9.
                               Rc8+ Ke7H {340}
   7810495   7.670   0.74 11.  1. Ke6 h4 2. Rgf8 Qg3 3. Rf7+ Qg7 4. Rcc7 Qxf7+
                               5. Kxf7 d3 6. Kf6+ Kg8 7. Kg6 Kf8 8. Kxh6 e2 9.
                               Rc8+ Ke7 {340}
  17136532  17.558   0.34 12-- 1. Ke6 h4 2. Rgf8 Qg3 3. Rf7+ Qg7 4. Rcc7 Qxf7+
                               5. Kxf7 e2 6. Kf6+ Kg8 7. Kg6 Kf8 8. Kxh6 e1=Q
                               9. Rg7 {-581}
  29556077  31.011   0.32 12t  1. Ke6 h4 2. Rgf8 Qg3 3. Rf7+ Qg7 4. Rcc7H
                               Qxf7+H 5. Kxf7H h5H {HT}
  37202698  39.795   0.32 12.  1. Ke6 h4 2. Rgf8 Qg3 3. Rf7+ Qg7 4. Rcc7 Qxf7+
                               5. Kxf7 h5
  40921127  45.850   0.72 13++ 1. Ke6 h4 2. Rgf8 Kg6 3. Rf7 h5 4. Rcc7 Qc3 5.
                               Rxc3 dxc3 6. Rf6+ Kg5 7. Rf1 e2 8. Rc1 Kf4 9.
                               Kf6 c2 10. Kg6 Kg4 11. Kf6 {260}
  41034041  46.032   1.72 13++ 1. Ke6 h4 2. Rgf8 Kg6 3. Rf7 Kh5 4. Rg8 Qg3 5.
                               Rf5+ Qg5 6. Rgxg5+ hxg5 7. Re5 Kh6
  71101665  1:19.2   2.48 13t  1. Ke6 h4 2. Rgf8 Qg3 3. Rh8+ Kg6 4. Rcg8+ Kh5
                               5. Rxg3 hxg3 6. Kf5 e2 7. Re8 d3H 8. Re3H Kh4H
                               9. Kg6H e1=QH 10. Rxe1H h5H {340}
  81512841  1:29.8   2.48 13.  1. Ke6 h4 2. Rgf8 Qg3 3. Rh8+ Kg6 4. Rcg8+ Kh5
                               5. Rxg3 hxg3 6. Kf5 e2 7. Re8 d3 8. Re3 Kh4 9.
                               Kg6 e1=Q 10. Rxe1 h5 {340}
  82089314  1:30.6   2.88 14++ 1. Ke6 h4 2. Rgf8 Qg3 3. Rh8+ Kg6 4. Rcg8+ Kh5
                               5. Rxg3 e2 6. Kf5 h3
  83713232  1:33.0   3.88 14++ 1. Ke6 h4 2. Rgf8 Qf1 3. Rxf1 h5
 107549768  1:59.2   5.44 14t  1. Ke6 h4 2. Rgf8 Kg6 3. Rf7 Kh5 4. Rg8 Qa5 5.
                               Rf5+ Qxf5+ 6. Kxf5 e2 7. Re8 h3 8. Rxe2 Kh4 9.
                               gxh3 h5 10. Ke4 d3 11. Kxd3 {HT} {500}
 122669594  2:17.5   5.44 14.  1. Ke6 h4 2. Rgf8 Kg6 3. Rf7 Kh5 4. Rg8 Qa5 5.
                               Rf5+ Qxf5+ 6. Kxf5 e2 7. Re8 h3 8. Rxe2 Kh4 9.
                               gxh3 h5 10. Ke4 d3 11. Kxd3 {HT} {500}

With the help of a bit of backward analysis, it can show, that the position is a
mate in 22 (or faster):

      436   0.401  Mat22 14.  1. Ke6 h4 2. Rgf8 Kg6 3. Rf6+ Kh5 4. Rg8 Qa5 5.
                              Rf5+ Qxf5+ 6. Kxf5 e2 7. Re8 h3 8. Rxe2 Kh4 9.
                              gxh3 d3 10. Re3 d2 11. Rd3 d1=Q 12. Rxd1 {EGTB}
                              12...Kg3! 13. Rd3+ Kf2! 14. Kf4! Ke2! 15. Rd4
                              h5 16. h4! Kf2! 17. Re4 Kg2! 18. Re2+! Kf1! 19.
                              Kf3! Kg1 20. Re3 Kh1 21. Kg3! Kg1 22. Re1#!
                              {500}
The PV after 2 min. above is (with one transposition) identical to this one for
17 plies.

Regards,
Dieter



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