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Subject: Re: nice test position from GM Shirov game

Author: Gian-Carlo Pascutto

Date: 16:09:49 12/05/01

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I am not convinced Qxd5 is better than Qxb8, and neither is
Crafty:

 12     6.28   0.65   1. Qxb8 Qxb8 2. Rxe2 Qe8 3. Nxd5 Nxa3
                                    4. Rb3 Qa4 5. Reb2 Nc4 6. Nb6 Qa1+
                                    7. Rb1
               12->  11.03   0.65   1. Qxb8 Qxb8 2. Rxe2 Qe8 3. Nxd5 Nxa3
                                    4. Rb3 Qa4 5. Reb2 Nc4 6. Nb6 Qa1+
                                    7. Rb1
               13    15.01   0.65   1. Qxb8 Qxb8 2. Rxe2 Qe8 3. Nxd5 f6
                                    4. Rb3 Qg6+ 5. Kf1 Qd3 6. Rb2 Nxa3
                                    7. c6 Re8
               13->  30.34   0.65   1. Qxb8 Qxb8 2. Rxe2 Qe8 3. Nxd5 f6
                                    4. Rb3 Qg6+ 5. Kf1 Qd3 6. Rb2 Nxa3
                                    7. c6 Re8
               14    45.57   0.57   1. Qxb8 Qxb8 2. Rxe2 Qe8 3. Nxd5 f6
                                    4. Rb3 a4 5. Rbb2 Qg6+ 6. Kf1 Qe4 7.
                                    Re1 Nxa3 8. Nc7
               14->   1:10   0.57   1. Qxb8 Qxb8 2. Rxe2 Qe8 3. Nxd5 f6
                                    4. Rb3 a4 5. Rbb2 Qg6+ 6. Kf1 Qe4 7.
                                    Re1 Nxa3 8. Nc7
               15     1:52     --   1. Qxb8
               15     2:26   0.00   1. Qxb8 Qxb8 2. Rxe2 Qe8 3. Nxd5 f6
                                    4. Kf1 Nxa3 5. Rb3 Qe4 6. Kg1 Qg4+
                                    7. Kf1 Qh3+ 8. Kg1 Qg4+
               15->   5:54   0.00   1. Qxb8 Qxb8 2. Rxe2 Qe8 3. Nxd5 f6
                                    4. Kf1 Nxa3 5. Rb3 Qe4 6. Kg1 Qg4+
                                    7. Kf1 Qh3+ 8. Kg1 Qg4+
               16     7:07   0.29   1. Qxb8 Qxb8 2. Rxe2 Qe8 3. Nxd5 Qc6
                                    4. Rb3 Qg6+ 5. Kf1 Qd3 6. Ke1 a4 7.
                                    Rbb2 Nxa3 8. Kf1 Nc4 9. Rb7
               16->  10:33   0.29   1. Qxb8 Qxb8 2. Rxe2 Qe8 3. Nxd5 Qc6
                                    4. Rb3 Qg6+ 5. Kf1 Qd3 6. Ke1 a4 7.
                                    Rbb2 Nxa3 8. Kf1 Nc4 9. Rb7
               17    16:18   0.40   1. Qxb8 Qxb8 2. Rxe2 Qe8 3. Nxd5 Qc6
                                    4. Rb3 a4 5. Rb4 Nxa3 6. Nf4 Qf3 7.
                                    d5 g5 8. Bd4+ Kg8 9. Ra2 Qd1+ 10. Kg2
                                    Nc2
               17->  25:56   0.40   1. Qxb8 Qxb8 2. Rxe2 Qe8 3. Nxd5 Qc6
                                    4. Rb3 a4 5. Rb4 Nxa3 6. Nf4 Qf3 7.
                                    d5 g5 8. Bd4+ Kg8 9. Ra2 Qd1+ 10. Kg2
                                    Nc2

My own program likes Qxd5 at first, but switches to Qxb8 after a longer
think.
--
GCP



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