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Subject: Re: Need Help with Evaluation of a Position

Author: Frank E. Oldham

Date: 20:33:31 09/13/04

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On September 13, 2004 at 19:54:18, John Merlino wrote:

>On September 13, 2004 at 19:26:12, Nolan Denson wrote:
>
>>I was playing a game on icc, when my Pro Deo made a pawn push that i am not too
>>sure if it was good. I am wondering what some of the other engines will come up
>>with.
>>
>>[D]2k4r/1r3pp1/3Pp1q1/pp2P3/5RP1/2P4p/1P5P/3Q1R1K w - - 1 1
>
>CM9_SKR on an AMD 2500 likes c4 with a good score. What did Pro Deo play?
>
>Time	Depth	Score	Positions	Moves
>0:00	1/3	1.81	1489		1.Qf3 Kb8 2.Rxf7 Rxf7 3.Qxf7 Qxg4
>					4.Qc7+ Ka8
>0:00	1/4	1.91	4188		1.Qf3 Kb8 2.Rxf7 Rxf7 3.Qxf7 Qxf7
>					4.Rxf7
>0:00	1/5	1.59	20889		1.Qf3 Kb8 2.Rd4 Qc2 3.d7 Rd8
>0:00	1/5	1.75	33372		1.b3 Rh4 2.Qf3 Kb8 3.Qe2 Rh8
>0:00	1/6	1.67	66387		1.b3 f6 2.exf6 e5 3.Rf5 gxf6 4.Rxf6
>0:01	1/7	1.71	217698		1.b3 Rf8 2.Qe2 Kb8 3.Rd4 b4 4.d7
>					Rd8
>0:01	1/7	1.81	357264		1.c4 f6 2.cxb5 Rd8 3.Qe2 fxe5 4.Rc4+
>					Kb8 5.Qxe5
>0:04	1/8	2.05	954901		1.c4 f6 2.cxb5 Kd7 3.Qc1 Rc8 4.Rc4
>					Qe8
>0:09	1/9	2.00	2197917		1.c4 f6 2.cxb5 Rd8 3.Qd2 fxe5 4.Rc4+
>					Kb8 5.Qxa5 Rc8 6.Rxc8+ Kxc8
>0:31	1/10	2.15	7307699		1.c4 f6 2.cxb5 Qe8 3.exf6 Qxb5
>					4.Qc2+ Kb8 5.fxg7 Qd5+ 6.R1f3 Rxg7
>					7.Qc3 e5
>1:06	1/11	1.97	15735542	1.c4 f6 2.cxb5 Qe8 3.exf6 gxf6
>					4.Qc2+ Kb8 5.Rxf6 Qxb5 6.Rf8+ Rxf8
>					7.Rxf8+ Ka7 8.Qf2+ Qb6 9.Qxb6+
>					Kxb6 10.g5
>
>jm

crafty19.17 likes c4 all the way to ply 15, when it fails-high for b4
-- so both pawn pushes are good :-)
does CM9_SKR find b4 if you let it run longer?

               14->   5:51   1.97   1. c4 f6 2. exf6 e5 3. Rf5 gxf6 4.
                                    Rxf6 Qe4+ 5. Qf3 Qxf3+ 6. R1xf3 Rg7
                                    7. cxb5 Rxg4 8. Rf7 Kb8 9. Re7 Rg2
                                    (s=2)
               15    11:27   1.92   1. c4 f6 2. exf6 gxf6 3. cxb5 Qg5 4.
                                    Rxf6 Qxb5 5. R1f2 Qc6+ 6. Kg1 Rg7 7.
                                    Rc2 Rxg4+ 8. Qxg4 Qxc2 9. Qxe6+ Kb7
                                    10. Qe5
               15    18:35     +1   1. b4!!
               15    24:02   2.61   1. b4 axb4 2. Rxb4 Kd7 3. Qf3 Rhb8
                                    4. Rf4 Kd8 5. Qxh3 f6 6. exf6 Kd7 7.
                                    Qe3 gxf6 8. Rxf6 Qxg4 9. Re1
               15->  24:16   2.61   1. b4 axb4 2. Rxb4 Kd7 3. Qf3 Rhb8
                                    4. Rf4 Kd8 5. Qxh3 f6 6. exf6 Kd7 7.
                                    Qe3 gxf6 8. Rxf6 Qxg4 9. Re1 (s=2)
               16    49:41   2.63   1. b4 axb4 2. cxb4 Re8 3. Qd2 f6 4.
                                    Rc1+ Kd7 5. exf6 gxf6 6. Qc3 Reb8 7.
                                    Rd4 Qe8 8. Qf3 Ra7 9. Qxf6 Qf8 10.
                                    Qe5
               16->  54:16   2.63   1. b4 axb4 2. cxb4 Re8 3. Qd2 f6 4.
                                    Rc1+ Kd7 5. exf6 gxf6 6. Qc3 Reb8 7.
                                    Rd4 Qe8 8. Qf3 Ra7 9. Qxf6 Qf8 10.
                                    Qe5
               17    93:33   2.52   1. b4 axb4 2. cxb4 f6 3. exf6 gxf6
                                    4. Qf3 Qc2 5. Rxf6 Qg2+ 6. Qxg2 hxg2+
                                    7. Kxg2 Rbh7 8. Rxe6 Rxh2+ 9. Kg3 R2h3+
                                    10. Kf2 Kd7 11. Rfe1 Rd3 12. R6e5 Kxd6
                                    13. Rxb5
               17-> 122:52   2.52   1. b4 axb4 2. cxb4 f6 3. exf6 gxf6
                                    4. Qf3 Qc2 5. Rxf6 Qg2+ 6. Qxg2 hxg2+
                                    7. Kxg2 Rbh7 8. Rxe6 Rxh2+ 9. Kg3 R2h3+
                                    10. Kf2 Kd7 11. Rfe1 Rd3 12. R6e5 Kxd6
                                    13. Rxb5 (s=2)
Frank



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