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Subject: Re: Endgame test position

Author: Dann Corbit

Date: 09:41:13 05/15/02

Go up one level in this thread


On May 15, 2002 at 07:46:27, Andrew Williams wrote:

>How long does it take your program to see Rxe7! here?
>
>[D]4r1k1/2R1N1b1/8/p7/1p6/6PK/7P/8 b - - bm Rxe7

Crafty:

White(1): epdpfga \rxe7.epd rxe7.out
PFGA: EPD record: 1
end-game phase
              clearing hash tables
              time surplus   0.00  time limit 16:39 (16:39)
         nss  depth   time  score   variation (1)
                9     0.25   0.00   1. ... Kh8 2. Rb7 Ra8 3. Nc6 Ra6 4.
                                    Nxb4 axb4 5. Rxb4 Kg8
                9->   0.28   0.00   1. ... Kh8 2. Rb7 Ra8 3. Nc6 Ra6 4.
                                    Nxb4 axb4 5. Rxb4 Kg8
               10     0.82   0.00   1. ... Kh8 2. Rb7 a4 3. Rxb4 Rxe7 4.
                                    Rxa4 Kh7 5. Kg4 Bc3 6. h4
               10->   0.92   0.00   1. ... Kh8 2. Rb7 a4 3. Rxb4 Rxe7 4.
                                    Rxa4 Kh7 5. Kg4 Bc3 6. h4
               11     1.52   0.00   1. ... Kh8 2. Rb7 a4 3. Rxb4 Rxe7 4.
                                    Rxa4 Kh7 5. Kg4 Bc3 6. h4 Kg8
               11->   1.78   0.00   1. ... Kh8 2. Rb7 a4 3. Rxb4 Rxe7 4.
                                    Rxa4 Kh7 5. Kg4 Bc3 6. h4 Kg8
               12     3.10   0.00   1. ... Kh8 2. Rb7 a4 3. Rxb4 Rxe7 4.
                                    Rxa4 Kh7 5. Kg4 Bc3 6. h4 Kg8 7. Kh5
               12->   4.24   0.00   1. ... Kh8 2. Rb7 a4 3. Rxb4 Rxe7 4.
                                    Rxa4 Kh7 5. Kg4 Bc3 6. h4 Kg8 7. Kh5
               13     9.69   0.00   1. ... Kh8 2. Rb7 a4 3. Rxb4 Rxe7 4.
                                    Rxa4 Kh7 5. Kg4 Bc3 6. h4 Kg8 7. Kh5
                                    Kf7
               13    11.84     ++   1. ... Rxe7!!
               13    15.12  -2.46   1. ... Rxe7 2. Rxe7 b3 3. g4 b2 4.
                                    Rb7 a4 5. g5 a3 6. g6 a2 7. Rb8+ Bf8
                                    8. Rxb2 a1=Q 9. Rb7
               13->  16.06  -2.46   1. ... Rxe7 2. Rxe7 b3 3. g4 b2 4.
                                    Rb7 a4 5. g5 a3 6. g6 a2 7. Rb8+ Bf8
                                    8. Rxb2 a1=Q 9. Rb7
               14    17.32     ++   1. ... Rxe7!!
               14    21.34  -4.64   1. ... Rxe7 2. Rxe7 b3 3. Rd7 a4 4.
                                    g4 b2 5. Rb7 a3 6. Ra7 b1=Q 7. Rxa3
                                    Qf1+ 8. Kh4 Bf6+ 9. Kh5 Qf4
               14->  21.91  -4.64   1. ... Rxe7 2. Rxe7 b3 3. Rd7 a4 4.
                                    g4 b2 5. Rb7 a3 6. Ra7 b1=Q 7. Rxa3
                                    Qf1+ 8. Kh4 Bf6+ 9. Kh5 Qf4
               15    30.29  -4.83   1. ... Rxe7 2. Rxe7 b3 3. Rd7 b2 4.
                                    Rb7 a4 5. Rb5 a3 6. Ra5 b1=Q 7. Rxa3
                                    Kh7 <HT>
               15->  31.96  -4.83   1. ... Rxe7 2. Rxe7 b3 3. Rd7 b2 4.
                                    Rb7 a4 5. Rb5 a3 6. Ra5 b1=Q 7. Rxa3
                                    Kh7 <HT>
               16    47.94  -4.89   1. ... Rxe7 2. Rxe7 b3 3. Rd7 b2 4.
                                    Rb7 a4 5. Rb5 a3 6. Ra5 b1=Q 7. Rxa3
                                    Kh7 8. Rf3 Qh1 9. Rf4 Kg6
               16->  52.51  -4.89   1. ... Rxe7 2. Rxe7 b3 3. Rd7 b2 4.
                                    Rb7 a4 5. Rb5 a3 6. Ra5 b1=Q 7. Rxa3
                                    Kh7 8. Rf3 Qh1 9. Rf4 Kg6
               17     1:40  -4.95   1. ... Rxe7 2. Rxe7 b3 3. Rd7 b2 4.
                                    Rb7 a4 5. Rb5 Bd4 6. Rb4 a3 7. Ra4
                                    b1=Q 8. Rxa3 Qf1+ 9. Kh4 Qf6+ 10. Kh3
                                    Qh6+ 11. Kg2 Qg5
               17->   2:08  -4.95   1. ... Rxe7 2. Rxe7 b3 3. Rd7 b2 4.
                                    Rb7 a4 5. Rb5 Bd4 6. Rb4 a3 7. Ra4
                                    b1=Q 8. Rxa3 Qf1+ 9. Kh4 Qf6+ 10. Kh3
                                    Qh6+ 11. Kg2 Qg5



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