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Subject: Re: An hard test position

Author: Robert Hyatt

Date: 21:05:30 08/07/00

Go up one level in this thread


On August 07, 2000 at 23:59:00, Robert Hyatt wrote:

>On August 07, 2000 at 08:30:35, blass uri wrote:
>
>>[D]6k1/6pp/1Q1pn1rr/p1p1p3/2P1P2q/1P3P1P/P2RN1PK/6R1 w - - 0 1
>>
>>How much time does your program need to find Rxd6?
>>Is it the only right move(I think that it is but I am not sure)?
>>
>>tiger played in a game Qxd6
>>and lost after Qf2 Qb8+?(better was Kh1 but it is also not an easy position for
>>programs) Kf7(chessmaster6000's evaluation is mate in 15).
>>
>>Qb8+ Nf8 seems to be better for black but I could not find a forced win.
>>chessmaster admit that it is better for black after a long time and changes its
>>mind later to Rxd6 with a draw score.
>>
>>Uri
>
>
>I get Rxd6 after about 15 seconds... score is 0.00... it never changes after
>that, at least through 13 plies and 3 minutes.


My cut/paste went into the toilet.  here goes again with the output from
Crafty:

         (3)   10     8.96  -0.12   1. Qb8+ Nf8 2. Qc8 Qf2 3. Qd8 Rh5 4.
                                    Rxd6 Rxd6 5. Qxd6 Qxe2 6. Qd5+ Kh8
                                    7. Qxc5
               10    15.29   0.00   1. Rxd6 Qf2 2. Rxe6 Rxe6 3. Qd8+ Kf7
                                    4. Qd7+ Kf8 5. Qd8+ Kf7
         (2)   10->  23.38   0.00   1. Rxd6 Qf2 2. Rxe6 Rxe6 3. Qd8+ Kf7
                                    4. Qd7+ Kf8 5. Qd8+ Kf7
               11    29.31   0.00   1. Rxd6 Qf2 2. Rxe6 Rxe6 3. Qd8+ Kf7
                                    4. Qd7+ Kf8 5. Qd8+ Kf7
         (3)   11->   1:02   0.00   1. Rxd6 Qf2 2. Rxe6 Rxe6 3. Qd8+ Kf7
                                    4. Qd7+ Kf8 5. Qd8+ Kf7
         (2)   12     1:17   0.00   1. Rxd6 Qf2 2. Rxe6 Rxe6 3. Qd8+ Kf7
                                    4. Qd7+ Kf8 5. Qd8+ Kf7
         (2)   12->   2:09   0.00   1. Rxd6 Qf2 2. Rxe6 Rxe6 3. Qd8+ Kf7
                                    4. Qd7+ Kf8 5. Qd8+ Kf7
               13     2:47   0.00   1. Rxd6 Qf2 2. Rxe6 Rxe6 3. Qd8+ Kf7
                                    4. Nc3 Rxh3+ 5. Kxh3 Rh6+ 6. Kg4 Qxg1
                                    7. Qd7+ Kf8 8. Qd8+ Kf7



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