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Subject: Re: Is this move really the best?

Author: Paulo Soares

Date: 18:08:46 05/03/00

Go up one level in this thread


On May 03, 2000 at 07:14:21, Stefan Meyer-Kahlen wrote:

>On May 03, 2000 at 05:48:33, Paulo Soares wrote:
>>
>>I analyzed 1. Rxe6 fxe6 2. Bh6 a6 for a long time, but I didn't get to find any
>>position in that  white are better. However, I think Howard is right
>>when he wrote: "the position was extremely deep and full of twists and
>>turns that computers needed a long time to resolve".
>>I will seek in the files with approximately 1.5 years to see what you and
>>Howard played, I am curious because I am not 100% sure that white
>>can't win/draw in this position.
>>
>>Paulo Soares
>
>
>I have let Shredder analyse the position after 1.Rxe6 fxe6 a bit. After a while
>Shredder switches to 2.Bh6, but the score is still significantly lower that at
>the root without playing 1.Rxe6.
>
>Thanks for all your input
>   Stefan
>
>
> 6.01   0:02.03  +1.74   2.Nxe6 Qa5 3.Bxd7+ Kf7 4.Qf3+ Bf6 5.Bg5 Rb8 6.Rd1 Ke7
>                         (223.571) 110.0
> 6 ->   0:02.06  +1.74   2.Nxe6 Qa5 3.Bxd7+ Kf7 4.Qf3+ Bf6 5.Bg5 Rb8 6.Rd1 Ke7
>                         (224.949) 109.0
> 7.01   0:04.28  +1.49-- 2.Nxe6 Qa5 3.Bxd7+ Kxd7 4.Nec5+ Ke8 5.Qd7+ Kf7 6.Nxb7
>                         Rc7 7.Qxe7+ (494.282) 115.4
> 7.01   0:04.79  +0.99-- 2.Nxe6 Qa5 3.Bxd7+ Kxd7 4.Nec5+ Ke8 5.Qd7+ Kf7 6.Nxb7
>                         Rc7 7.Qxe7+ (573.511) 119.5
> 7.01   0:06.07  +0.82   2.Nxe6 Qa5 3.Bxd7+ Kxd7 4.Nec5+ Ke8 5.Qd7+ Kf7 6.Nxb7
>                         Rc7 7.Nd6+ Kg7 8.Ne8+ Rxe8 9.Qxe8 (739.209) 121.6
> 7 ->   0:06.29  +0.82   2.Nxe6 Qa5 3.Bxd7+ Kxd7 4.Nec5+ Ke8 5.Qd7+ Kf7 6.Nxb7
>                         Rc7 7.Nd6+ Kg7 8.Ne8+ Rxe8 9.Qxe8 (765.290) 121.5
> 8.01   0:11.54  +0.80   2.Nxe6 Qa5 3.Bxd7+ Kxd7 4.Nec5+ Ke8 5.Qd7+ Kf7 6.Nxb7
>                         Rcd8 7.Qc6 Qc7 8.Nxd8+ Rxd8 9.Qxc7 Nxc7
>                         (1.376.981) 119.2
> 8 ->   0:11.65  +0.80   2.Nxe6 Qa5 3.Bxd7+ Kxd7 4.Nec5+ Ke8 5.Qd7+ Kf7 6.Nxb7
>                         Rcd8 7.Qc6 Qc7 8.Nxd8+ Rxd8 9.Qxc7 Nxc7
>                         (1.391.745) 119.3
> 9.01   0:24.64  +0.55-- 2.Nxe6 Qa5 3.Bxd7+ Kxd7 4.Nec5+ Ke8 5.Qd7+ Kf7 6.Nxb7
>                         Rc7 7.Nd6+ Kg7 8.Ne8+ Rxe8 9.Bh6+ Kxh6 10.Qh3+ Kg5
>                         11.Qg3+ Kf6 12.Qe5+ Kxe5 (2.717.680) 110.2
> 9.01   0:32.15  +0.05-- 2.Nxe6 Qa5 3.Bxd7+ Kxd7 4.Nec5+ Ke8 5.Qd7+ Kf7 6.Nxb7
>                         Rc7 7.Nd6+ Kg7 8.Ne8+ Rxe8 9.b3 Rxd7 (3.687.498) 114.6
> 9.01   0:46.23  -0.20   2.Nxe6 Qa5 3.Bxd7+ Kxd7 4.Nec5+ Ke8 5.Qd7+ Kf7 6.Nxb7
>                         Rc7 7.Nd6+ Kg7 8.Ne8+ Rxe8 9.Qxe8 Nf6 10.Qb8 Rxc1+
>                         (5.350.617) 115.7
> 9 ->   0:49.75  -0.20   2.Nxe6 Qa5 3.Bxd7+ Kxd7 4.Nec5+ Ke8 5.Qd7+ Kf7 6.Nxb7
>                         Rc7 7.Nd6+ Kg7 8.Ne8+ Rxe8 9.Qxe8 Nf6 10.Qb8 Rxc1+
>                         (5.747.090) 115.5
>10.01   1:47.68  -0.45-- 2.Nxe6 Qa5 3.Bxd7+ Kxd7 4.Nec5+ Ke8 5.Qd7+ Kf7 6.Nxb7
>                         Rc7 7.Nd6+ Kg7 8.Ne8+ Rxe8 9.Bh6+ Kxh6 10.Qh3+ Kg5
>                         11.Qh6+ Kxh6 (12.019.946) 111.6
>10.01   2:25.21  -0.95-- 2.Nxe6 Qa5 3.Bxd7+ Kxd7 4.Nec5+ Ke8 5.Qd7+ Kf7 6.Nxb7
>                         Rc7 7.Nd6+ Kg7 8.Ne8+ Rxe8 9.Bh6+ Kxh6 10.Qh3+ Kg5
>                         11.Qh6+ Kxh6 (16.533.198) 113.8
>10.01   3:18.28  -1.36   2.Nxe6 Qa5 3.Bxd7+ Kxd7 4.Nec5+ Ke8 5.Qd7+ Kf7 6.Nxb7
>                         Rc7 7.Nxa5 Rxd7 8.Nc6 Rc7 9.Nxe7 Rxe7 10.Bg5 Re5
>                         11.Bh6 (22.759.629) 114.7
>10 ->   3:36.00  -1.36   2.Nxe6 Qa5 3.Bxd7+ Kxd7 4.Nec5+ Ke8 5.Qd7+ Kf7 6.Nxb7
>                         Rc7 7.Nxa5 Rxd7 8.Nc6 Rc7 9.Nxe7 Rxe7 10.Bg5 Re5
>                         11.Bh6 (24.620.915) 113.9
>11.01   6:50.21  -1.61-- 2.Nxe6 Qa5 3.Bxd7+ Kxd7 4.Nec5+ Ke8 5.Qd7+ Kf7 6.Nxb7
>                         Rc7 7.Nxa5 Rxd7 8.Nc6 Rc7 9.Nxe7 Rxe7 10.b3 Kg7 11.Bg5
>                         (46.176.846) 112.5
>11.01  10:45.17  -1.88   2.Nxe6 Qa5 3.Bxd7+ Kxd7 4.Nec5+ Ke8 5.Qd7+ Kf7 6.Nxb7
>                         Rc7 7.Nd6+ Kg7 8.Qb5 Qxb5 9.Nxb5 Rd7 10.Be3 Nxe3
>                         11.fxe3 Rc8 12.Rf1 (71.838.251) 111.3
>11 ->  13:25.06  -1.88   2.Nxe6 Qa5 3.Bxd7+ Kxd7 4.Nec5+ Ke8 5.Qd7+ Kf7 6.Nxb7
>                         Rc7 7.Nd6+ Kg7 8.Qb5 Qxb5 9.Nxb5 Rd7 10.Be3 Nxe3
>                         11.fxe3 Rc8 12.Rf1 (88.329.686) 109.7
>12.01  27:53.01  -1.93   2.Nxe6 Qa5 3.Bxd7+ Kxd7 4.Nec5+ Ke8 5.Qd7+ Kf7 6.Nxb7
>                         Rc7 7.Nxa5 Rxd7 8.Bh6 Rc8 9.Re1 Kg8 10.Nb3
>                         (182.248.490) 108.9
>12.02  36:42.14  -1.92++ 2.Bh6 a6 3.Bxa6 Bxa6 4.Nxe6 Qa5 5.Ng7+ Kf7 6.Qe6+ Kf8
>                         7.Qxd7 Qc7 8.Nf5+ Kf7 9.Qxd5+ Kf6 10.Bg7+
>                         (236.080.207) 107.2
>12.02  44:10.84  -1.57++ 2.Bh6 a6 3.Bxa6 Bxa6 4.Nxe6 Qa5 5.Ng7+ Kf7 6.Qe6+ Kf8
>                         7.Qxd7 Qc7 8.Qxd5 (278.298.198) 104.9
>12.02  55:46.12  -1.15   2.Bh6 a6 3.Bxa6 Qc7 4.Nxe6 Qc6 5.Bxb7 Qxb7 6.Ng7+ Kf8
>                         7.Re1 Qc6 8.Nf5+ Kf7 9.Nd4 Qxa4 10.Qe6+ (342.851.382)
>                         102.4
>12 ->  58:46.01  -1.15   2.Bh6 a6 3.Bxa6 Qc7 4.Nxe6 Qc6 5.Bxb7 Qxb7 6.Ng7+ Kf8
>                         7.Re1 Qc6 8.Nf5+ Kf7 9.Nd4 Qxa4 10.Qe6+ (361.427.969)
>                         102.5
>13.01  84:06.04  -1.05   2.Bh6 a6 3.Bxa6 Qc7 4.Nxe6 Qc6 5.Bxb7 Qxb7 6.Ng7+ Kf8
>                         7.Re1 Qc6 8.Nf5+ Kf7 9.Nd4 Qxa4 10.Qe6+ (512.424.766)
>                         101.5


I didn't get to improve the position of the white after 1. Rxe6 fxe6 2. Bh6 a6.
The initial position is very complex, it is difficult to aim the best move.
Ernst A. Heinz shows that 1. Nxe6 can also be analyzed more deeply, and I
agree. On the other hand Peter thinks 1. Qd3 are the best move.
I find difficult to arrive to a conclusion without analyzing with more depth
1. Qd3, 1. Bh6, 1. Rxe6 and 1. Nxe6. Ok, I know that am writing
the obvious, but this is the conclusion  that I arrived after some
hours of analysis.

Paulo



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