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Subject: Re: How long does it take your program to find this simple mate in 4?

Author: Vincent Lejeune

Date: 17:51:36 02/08/00

Go up one level in this thread


On February 08, 2000 at 20:11:50, Dann Corbit wrote:

>2bnN1k1/6P1/4p3/1P2N1P1/3K4/8/8/8 w - -


Analysis by Fritz 6 Light:
...
+-  (10.44) 1.Re3 Fb7 2.Cg4 Rf7 3.Cgf6 e5   00:00:00
+-  (10.66) 1.g6   00:00:00
+-  (#4) 1.g6 Fb7 2.Cg4 e5+ 3.Re3 Ce6 4.Cgf6#   00:00:00


Analysis by Fritz 5.32:
...
+-  (10.41) 1.Re3 Fb7 2.Cg4 Rf7 3.Cgf6 e5 4.g8D+ Re7   00:00:00
+-  (10.41) 1.Re3 Fb7 2.Cg4 Rf7 3.Cgf6 e5 4.g8D+ Re7   00:00:01
+-  (10.47) 1.g6   00:00:01
+-  (#4) 1.g6 Fd7 2.Cxd7 e5+ 3.Re3 Cb7 4.Cdf6#   00:00:01


Analysis by Hiarcs 7.32:
...
+-  (13.25) 1.Rc3 Cb7 2.Cg4 Rf7 3.Cgf6 Cd6 4.g8D+ Re7   00:00:00
+-  (13.80) 1.g6 Cc6+   00:00:01
+-  (#5) 1.g6 Fa6 2.Cg4 Cc6+ 3.bxc6   00:00:01
+-  (#4) 1.g6 Fa6 2.Cg4 Cc6+ 3.Re3 Fxb5 4.Cgf6#   00:00:01


Analysis by Crafty 16.15:
...
+-  (6.03) 1.Re3   00:00:00
+-  (11.37) 1.Re3 Fb7 2.Cd7 Rf7 3.Cdf6 Re7 4.g8D e5   00:00:01
+-  (#4) 1.g6 Fb7 2.Cg4 e5+ 3.Re3 Cc6 4.Cgf6#   00:00:01
+-  (#4) 1.g6 Fb7 2.Cg4 e5+ 3.Re3 Cc6 4.Cgf6#   00:00:01

Crafty 17.07 under Hiarcs interface have strange behaviour sometimes it freeze
just before displaying the mate  and when i change tablebase size it display it
as fast as other engine ...

(A)
Analysis by Crafty 17.07:
...
+-  (5.86) 1.Cg6 Rf7 2.Ce7 Rxe8 3.g8D+ Rxe7 4.Dg7+ Rd6 5.g6 Fb7 6.De5+ Rd7
00:00:00
+-  (6.24) 1.Cg6 Rf7 2.Ce7 Rxe8 3.g8D+ Rxe7 4.Dg7+ Re8 5.g6 Fb7 6.Dh8+ Rd7 7.g7
Cf7 8.g8D Cxh8 9.Dxh8   00:00:01
+-  (6.64) 1.g6   00:00:01


(B)
Analysis by Crafty 17.07:
...
+-  (6.24) 1.Cg6 Rf7 2.Ce7 Rxe8 3.g8D+ Rxe7 4.Dg7+ Re8 5.g6 Fb7 6.Dh8+ Rd7 7.g7
Cf7 8.g8D Cxh8 9.Dxh8   00:00:01
+-  (6.64) 1.g6   00:00:01
+-  (#4) 1.g6 Fb7 2.Cd7 e5+ 3.Re3 Fd5 4.Cdf6#   00:00:04
+-  (#4) 1.g6 Fb7 2.Cd7 e5+ 3.Re3 Fd5 4.Cdf6#   00:00:04
+-  (#4) 1.g6 Fb7 2.Cd7 e5+ 3.Re3 Fd5 4.Cdf6#   00:00:06



Under Win2000 Crafty 17.08 seems to have the same problem with this mate, it
stay frozen after finding the keymove !
Bob , heeeelp ! ;)


White(1): read mate4.pgn

       +---+---+---+---+---+---+---+---+
    8  |   |   | *B| *N| N |   | *K|   |
       +---+---+---+---+---+---+---+---+
    7  |   |   |   |   |   |   | P |   |
       +---+---+---+---+---+---+---+---+
    6  |   |   |   |   | *P|   |   |   |
       +---+---+---+---+---+---+---+---+
    5  |   | P |   |   | N |   | P |   |
       +---+---+---+---+---+---+---+---+
    4  |   |   |   | K |   |   |   |   |
       +---+---+---+---+---+---+---+---+
    3  |   |   |   |   |   |   |   |   |
       +---+---+---+---+---+---+---+---+
    2  |   |   |   |   |   |   |   |   |
       +---+---+---+---+---+---+---+---+
    1  |   |   |   |   |   |   |   |   |
       +---+---+---+---+---+---+---+---+
         a   b   c   d   e   f   g   h

White(1): analyze
end-game phase
              clearing hash tables
              time surplus   0.00  time limit 30.00 (3:00)
         nss  depth   time  score   variation (1)
                9     0.35   5.86   1. Ng6 Kf7 2. Ne7 Kxe8 3. g8=Q+ Kxe7
                                    4. Qg7+ Kd6 5. g6 Bb7 6. Qe5+ Kd7
                9->   0.48   5.86   1. Ng6 Kf7 2. Ne7 Kxe8 3. g8=Q+ Kxe7
                                    4. Qg7+ Kd6 5. g6 Bb7 6. Qe5+ Kd7
               10     0.74   6.24   1. Ng6 Kf7 2. Ne7 Kxe8 3. g8=Q+ Kxe7
                                    4. Qg7+ Ke8 5. g6 Bb7 6. Qh8+ Kd7 7.
                                    g7 Nf7 8. g8=Q Nxh8 9. Qxh8
               10     1.12     ++   1. g6!!



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