Author: Uri Blass
Date: 01:11:11 05/20/01
Go up one level in this thread
On May 20, 2001 at 03:33:13, Uri Blass wrote:
>On May 19, 2001 at 11:03:49, Dieter Buerssner wrote:
>
>>In the game Yace - Goldbar in Leiden, the following position was on the board:
>>
>>[D] 1r3rk1/p1q2pp1/3b3p/7Q/2b5/3NB2P/n1P2PP1/R3RBK1 w - -
>>
>>I think, this may be suitable as a test position. Yace here played Bxh6.
>>What do other programs think?
>>
>>Regards,
>>Dieter
>>
>>Yace on AMD K6-2 475, 30M hash:
>>
>> 4731871 32.256 0.33 9t 1.Qg4 f5 2.Qd4 Rf7 3.Be2 Bh2+ 4.Kf1 Bd6 5.Nc5
>> Bxc5 6.Qxc5 {10}
>> 10210373 1:09.6 0.34 9t+ 1.Bxh6 gxh6 2.Re4 Bxd3 3.cxd3 Bh2+ 4.Kh1 Qc4
>> 12640730 1:27.3 0.66 9t 1.Bxh6 gxh6 2.Re4 Be6 3.Qxh6 Qc3 4.Rxe6 Qxa1
>> 5.Qg5+ Qg7 6.Qxg7+ Kxg7H {HT} {-340}
>> 13611852 1:33.3 0.66 9. 1.Bxh6 gxh6 2.Re4 Be6 3.Qxh6 Qc3 4.Rxe6 Qxa1
>> 5.Qg5+ Qg7 6.Qxg7+ Kxg7 {HT} {-340}
>> 48138295 5:21.8 0.86 10t 1.Bxh6 gxh6 2.Re4 Bh2+ 3.Kh1 Rb6 4.Qg4+ Rg6
>> 5.Rxc4 Rxg4 6.Rxc7 Bxc7 {HT} {-420}
>> 52663477 5:50.6 0.86 10. 1.Bxh6 gxh6 2.Re4 Bh2+ 3.Kh1 Rb6 4.Qg4+ Rg6
>> 5.Rxc4 Rxg4 6.Rxc7 Bxc7 {HT} {-420}
>
>Here is Deep Fritz's analysis on pIII800
>
>New position
>1r3rk1/p1q2pp1/3b3p/7Q/2b5/3NB2P/n1P2PP1/R3RBK1 w - - 0 1
>
>Analysis by Deep Fritz:
>
>1.Rxa2--
> ³ (-0.53) Depth: 1/3 00:00:00
>1.Rxa2-- Bxa2
> µ (-1.28) Depth: 1/5 00:00:00
>1.Bxh6!
> µ (-1.19) Depth: 1/8 00:00:00
>1.Bxh6! gxh6
> µ (-1.03) Depth: 1/8 00:00:00
>1.Be2!
> ³ (-0.47) Depth: 1/8 00:00:00
>1.Be2!
> ² (0.47) Depth: 1/8 00:00:00
>1.Be2 Rfe8
> = (0.22) Depth: 2/8 00:00:00
>1.Nc5!
> ² (0.28) Depth: 2/9 00:00:00
>1.Nc5! Bxf1 2.Kxf1
> ² (0.44) Depth: 2/9 00:00:00
>1.Nc5 Bxf1 2.Rxa2
> = (0.25) Depth: 3/13 00:00:00 1kN
>1.g3!
> ² (0.28) Depth: 3/13 00:00:00 2kN
>1.g3 Rb5 2.Qf3 Rfb8
> = (0.03) Depth: 4/15 00:00:00 5kN
>1.Nc5!
> = (0.06) Depth: 4/15 00:00:00 6kN
>1.Nc5! Bxf1
> = (0.13) Depth: 4/15 00:00:00 8kN
>1.Be2!
> = (0.16) Depth: 4/15 00:00:00 9kN
>1.Be2! Rfe8
> = (0.22) Depth: 4/15 00:00:00 10kN
>1.Qg4!
> = (0.25) Depth: 4/16 00:00:00 15kN
>1.Qg4! f5 2.Qg6 a5
> ² (0.38) Depth: 4/16 00:00:00 18kN
>1.Qg4 f5 2.Qg6 Rf6 3.Qh5
> ² (0.34) Depth: 5/17 00:00:00 35kN
>1.Qg4 f5 2.Qg6 Rf6 3.Qh5 a5
> ² (0.31) Depth: 6/20 00:00:00 99kN
>1.Qg4 f5 2.Qg6 Rf6 3.Qh5 Bf7 4.Qe2
> ² (0.28) Depth: 7/22 00:00:00 273kN
>1.Qg4 Be6 2.Qa4 Nb4 3.Bxa7 Rb7 4.Nxb4 Rxb4 5.Qa6
> ² (0.34) Depth: 8/24 00:00:01 964kN
>1.Nc1!
> ² (0.38) Depth: 8/24 00:00:03 2279kN
>1.Nc1! Bxf1 2.Rxa2 Bb5 3.Bxa7 Rfe8 4.Re3 Bh2+ 5.Kh1
> ² (0.41) Depth: 8/24 00:00:03 2521kN
>1.Nc1 Bxf1 2.Rxa2 Bb5 3.Bxa7 Rfe8 4.Rd1 Bh2+ 5.Kh1 Rb7
> ² (0.44) Depth: 9/25 00:00:05 3948kN
>1.Nc1 Bxf1 2.Rxa2 Bb5 3.Bxa7 Rbe8 4.Be3 Re5 5.Qf3 Rfe8 6.Kh1
> ² (0.31) Depth: 10/26 00:00:10 7135kN
>1.Bxh6!
> ² (0.34) Depth: 10/29 00:00:34 23564kN
>1.Bxh6! Rb5 2.Qg4 f5 3.Qg6 Rb6 4.Kh1 Be5 5.Nxe5
> ² (0.47) Depth: 10/33 00:00:45 30692kN
>1.Bxh6 Rb5 2.Qg4 f5 3.Qg6 Rb6 4.Qg5 Nc3 5.Nf4 Bxf1 6.Kxf1 Rfb8
> ² (0.59) Depth: 11/29 00:00:58 40374kN
>1.Bxh6 Rb5 2.Qg4 f5 3.Qg5 Nc3 4.Nf4 Bxf1 5.Kxf1 Ne4 6.Qxg7+ Qxg7
> ² (0.56) Depth: 12/33 00:02:05 88069kN
>1.Bxh6!
> ± (0.88) Depth: 13/37 00:06:03 255568kN
>1.Bxh6! Rb5 2.Qg4 f5 3.Qg5 f4 4.Qg6 Rb6 5.Nc5
> ± (1.06) Depth: 13/37 00:11:02 457398kN
>
>(Blass, Tel-Aviv 20.05.2001)
>I am not sure if 1.Bxh6 is a simple win after the right defence.
>Avoiding gxh6 may be another test position.
>Goldbar failed to solve it in the game.
>
>Uri
Here is the last analysis by Deep Fritz
It seems that Bxh6 wins a pawn.
1.Bxh6 Rbe8 2.Be3 a5 3.Bd4 a4 4.Qg4 f5 5.Qg6 Rxe1
± (1.25) Depth: 14/39 00:46:05 1864916kN
Here is the analysis after 1.Bxh6 gxh6
New position
1r3rk1/p1q2p2/3b3p/7Q/2b5/3N3P/n1P2PP1/R3RBK1 w - - 0 1
Analysis by Deep Fritz:
2.Rxa2--
-+ (-2.69) Depth: 1/4 00:00:00
2.Rxa2--
-+ (-2.69) Depth: 1/8 00:00:00
2.Qxh6!
-+ (-1.87) Depth: 1/8 00:00:00
2.Qxh6!
µ (-1.03) Depth: 1/8 00:00:00
2.Qxh6 Nc3 3.Qg5+ Kh7
µ (-1.31) Depth: 2/7 00:00:00
2.Qxh6 Nc3 3.Qg5+ Kh7 4.Qh5+ Kg8
µ (-1.25) Depth: 3/11 00:00:00 1kN
2.Qxh6 Rfe8 3.Qg5+ Kh7 4.g3
µ (-1.16) Depth: 4/15 00:00:00 4kN
2.Qxh6 Rfe8 3.Qg5+ Kh7 4.Qh5+ Kg7 5.g3
µ (-1.09) Depth: 5/20 00:00:00 17kN
2.Qxh6 Bh2+ 3.Kh1 Rb6 4.Qh5 Bd6 5.g3
µ (-0.84) Depth: 6/20 00:00:00 74kN
2.Re4!
µ (-0.81) Depth: 6/22 00:00:00 133kN
2.Re4! Kh7 3.Qf5+ Kh8 4.Qf6+ Kh7 5.Qf5+ Kh8 6.Qf6+ Kh7 7.Qf5+ Kh8
= (0.00) Depth: 6/24 00:00:00 207kN
2.Re4 Kh7 3.Qf5+ Kh8 4.Qf6+ Kh7 5.Qf5+ Kh8 6.Qf6+ Kh7 7.Qf5+ Kh8
= (0.00) Depth: 7/23 00:00:00 375kN
2.Re4!
= (0.16) Depth: 8/25 00:00:01 983kN
2.Re4! Kh7 3.Rh4 Bh2+ 4.Kh1 Rb6 5.g3 Bxg3 6.fxg3
² (0.56) Depth: 8/28 00:00:02 1342kN
2.Re4 Kh7 3.Rh4 Bh2+ 4.Kh1 Rb6 5.g3 Bxg3 6.Qf5+ Kh8 7.fxg3 Bxd3
² (0.56) Depth: 9/31 00:00:04 2688kN
2.Re4!
± (0.88) Depth: 10/32 00:00:09 6095kN
2.Re4! Bxd3 3.Bxd3 f5 4.Re6 Bh2+ 5.Kf1 Bf4 6.Rxa2 Rb1+ 7.Re1 Rxe1+
± (1.13) Depth: 10/32 00:00:16 10416kN
2.Re4 Bxd3 3.Bxd3 f5 4.Re6 Bf4 5.g3 Qf7 6.Qxf7+ Kxf7 7.Ra6 Ke8
± (1.19) Depth: 11/31 00:00:36 24481kN
2.Re4 Bxd3 3.Bxd3 f5 4.Bc4+ Kg7 5.Re6 Bh2+ 6.Kh1 Bf4 7.Bxa2 Qc3
± (1.28) Depth: 12/32 00:01:24 56988kN
2.Re4 Bxd3 3.Bxd3 f5 4.Bc4+ Kh7 5.Re6 Qg7 6.Rd1 Bf4 7.Bxa2 Rb2
+- (1.44) Depth: 13/35 00:03:32 143907kN
(Blass, Tel-Aviv 20.05.2001)
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