Author: Jari Kylmälä
Date: 03:57:41 11/10/97
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On November 09, 1997 at 23:07:06, Robert Sherman wrote: > >I disagree that this is a "simple recapture." In this game there is a >material imbalance and a positional imbalance. The Nxc7 is a sacrifice >that should be rejected with black easily winning. A human would think >if I stop the attack on my king, I win easily and take their time >knowing that it is the most important move in the game. Rebel 9's score >drops almost immediately from from +8 to + 5 and Rebel's time estimation >thinks it will take from 3 to 5 minutes. Then all of sudden it takes >the knight after 30 seconds of thought. On the fixed time level it sees >at least a draw and changes its move to Bf2+ in 45 seconds. This move >is a sac, not a recapture. A simple recapture would be taking back a >knight after bishop was captured, or an exchange of rooks, which 30 >seconds would be enough time to look for an in-between move. Anyway, >Rebel on the fixed time control changes its PV away from Qxc7 the second >fastest of the many programs I have tested. Genius is number one by >playing d5 in what I think was 12 seconds. Also, it is the only >computer that would suggest the winning sac try of Nxc7, I wonder if any >other computer would try that. I didn't test Rebel 9 with that. >Anyway, I really like Rebel 9 and I am happy I purchased it. So keep up >the good work. > >Robert Sherman > > The PV cm5500 gives here is very interesting. It doesn't like Qxc7 on first plys.. the PV on PPro/210MHz goes like this: time in secs: 0-1 d5! 1-2 Qxc7 2-3 Bf2 3-10 Ng3 11-15 Bf2 16-> d5 cm5500 seems to discard Qxc7 very quickly.. after 2 secs of thinking. Any program faster? -- Jari Kylmälä >>>White : Robert Sherman Black: Rebel 9 >>>1. e4 e5 2. Nf3 Nc6 3. Bc4 Bc5 4. Nc3 Nc6 5. Nd5 Nxe4 6. d3 >>> Nxf2 7. Qe2 Nxh1 8. Ng5 O-O 9. Nxc7 Qxc7 10. Qh5 h6 11. Bxf7 >>>Kh8 12. Qg6 Qa5 13. c3 Qxc3 14. bc Bf2 15. Kd1 Ne7 16. Qh7#
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