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Subject: Re: A test position of true beauty! All engines seems to have trouble with

Author: Dieter Buerssner

Date: 11:39:17 12/19/02

Go up one level in this thread


On December 18, 2002 at 20:16:26, robert flesher wrote:

>4rb2/1p1q1ppk/p1n1p2p/2p1Pn2/3PNR2/2P2K2/P2QBP2/6R1 w - - 0 1

Yace finds Rxf5 in 2 seconds, needs 5 seconds to show a positive score, and
27 s to show a convincing score (P4, 2.53 GHz):

   1089308   1.428  -1.25  7t  1. Kg2 cxd4 2. cxd4 Rd8 3. Rg4 Nxe5 4. dxe5
                               Qxd2 {-741}
   1748840   2.282  -1.24  7t+ 1. Rxf5 exf5 2. Qxh6+ Kxh6 3. Rh1+ Kg6 4. Kf4
                               Qxd4 5. Bh5+ Kh7 6. cxd4 Nxe5 7. dxe5 fxe4 8.
                               Bxf7#H {-160}
   1818008   2.383  -0.89  7++ 1. Rxf5 exf5 2. Qxh6+ Kxh6 3. Rh1+ Kg6 4. Kf4
                               Qe6 5. Rh8 Qb3 6. axb3 Rd8 {-80}
   1949169   2.556  -0.63  7t  1. Rxf5 Nxd4+ 2. cxd4 exf5 3. Nd6 Bxd6 4. exd6
                               Qxd6 5. d5 {30}
   2330554   3.051  -0.63  7.  1. Rxf5 Nxd4+ 2. cxd4 exf5 3. Nd6 Bxd6 4. exd6
                               Qxd6 5. d5 {30}
   3057737   4.104  -0.23  8++ 1. Rxf5 Nxd4+ 2. cxd4 exf5 3. Qxh6+ Kxh6 4.
                               Rh1+ Kg6 5. Kf4 Qd6 6. Bh5+ Kh7 7. exd6 g6 8.
                               Bxg6+ Kg8 {260}
   3586994   4.861   0.52  8t  1. Rxf5 Nxd4+ 2. cxd4 exf5 3. Qxh6+ Kxh6 4.
                               Rh1+ Kg6 5. Kf4 Qc6 6. Bh5+ Kh7 7. Bxf7+ Qh6+
                               8. Rxh6+ Kxh6 9. Bxe8 fxe4 10. d5 b5 11. Kxe4
                               {0}
   4251585   5.642   0.52  8.  1. Rxf5 Nxd4+ 2. cxd4 exf5 3. Qxh6+ Kxh6 4.
                               Rh1+ Kg6 5. Kf4 Qc6 6. Bh5+ Kh7 7. Bxf7+ Qh6+
                               8. Rxh6+ Kxh6 9. Bxe8 fxe4 10. d5 b5 11. Kxe4
                               {0}
   6253461   8.275   0.52  9t  1. Rxf5 Nxd4+ 2. cxd4 exf5 3. Qxh6+ Kxh6 4.
                               Rh1+ Kg6 5. Kf4 Qc6 6. Bh5+ Kh7 7. Bxf7+ Qh6+
                               8. Rxh6+ Kxh6 9. Bxe8 fxe4 10. d5 b5 11. Kxe4
                               {0}
   7775292  10.018   0.52  9.  1. Rxf5 Nxd4+ 2. cxd4 exf5 3. Qxh6+ Kxh6 4.
                               Rh1+ Kg6 5. Kf4 Qc6 6. Bh5+ Kh7 7. Bxf7+ Qh6+
                               8. Rxh6+ Kxh6 9. Bxe8 fxe4 10. d5 b5 11. Kxe4
                               {0}
   9818266  13.005   0.92 10++ 1. Rxf5 Nxd4+ 2. cxd4 exf5 3. Qxh6+ Kxh6 4.
                               Rh1+ Kg6 5. Kf4 Qc6 6. d5 Rxe5 7. Bh5+ Kh7 8.
                               dxc6 Re8 9. Nxc5 g5+ 10. Kxg5 Bxc5 11. cxb7
                               Bxf2 12. Bxf7+ {0}
  12622617  17.518   1.92 10++ 1. Rxf5 Nxd4+ 2. cxd4 exf5 3. Qxh6+ Kxh6 4.
                               Rh1+ Kg6 5. Kf4 Qc6 6. d5 Rxe5 7. Bh5+ Kh7 8.
                               Ng5+ Kh8 9. dxc6 Rd5 10. cxb7 Rd1
  18446659  26.839   3.01 10t  1. Rxf5 Nxd4+ 2. cxd4 exf5 3. Qxh6+ Kxh6 4.
                               Rh1+ Kg6 5. Kf4 Qc6 6. d5 fxe4 7. dxc6 Rxe5 8.
                               Kxe5 bxc6 9. Bh5+ Kg5 10. Bxf7 {260}
  20865837  29.664   3.01 10.  1. Rxf5 Nxd4+ 2. cxd4 exf5 3. Qxh6+ Kxh6 4.
                               Rh1+ Kg6 5. Kf4 Qc6 6. d5 fxe4 7. dxc6 Rxe5 8.
                               Kxe5 bxc6 9. Bh5+ Kg5 10. Bxf7 {260}
  38622813  57.746   3.41 11++ 1. Rxf5 Nxd4+ 2. cxd4 exf5 3. Qxh6+ Kxh6 4.
                               Rh1+ Kg6 5. Kf4 Qc6 6. d5 Be7 7. dxc6 Bd8 8.
                               cxb7 fxe4 9. Bh5+ Kh7 10. b8=Q Bg5+ 11. Kxg5
                               Rxb8 12. Bxf7# {270}
  54485610  1:22.9   3.76 11t  1. Rxf5 Nxd4+ 2. cxd4 exf5 3. Qxh6+ Kxh6 4.
                               Rh1+ Kg6 5. Kf4 Qc6 6. d5 fxe4 7. dxc6 Rxe5 8.
                               Kxe5 bxc6 9. Bxa6 e3 10. fxe3 {340}
  61396482  1:31.6   3.76 11.  1. Rxf5 Nxd4+ 2. cxd4 exf5 3. Qxh6+ Kxh6 4.
                               Rh1+ Kg6 5. Kf4 Qc6 6. d5 fxe4 7. dxc6 Rxe5 8.
                               Kxe5 bxc6 9. Bxa6 e3 10. fxe3 {340}

Regards,
Dieter



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