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Subject: Re: Marshall Attack - test

Author: Uri Blass

Date: 09:26:09 09/17/03

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On September 17, 2003 at 11:32:21, Drexel,Michael wrote:

>On September 17, 2003 at 10:11:12, Mihaly Szalai wrote:
>
>>1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Be7 6. Re1 b5 7. Bb3 O-O 8. c3
>>d5 9. exd5 e4 10. Ng5 Bg4 11. Qc2 Ne5 12. Nxe4 Nxe4 13. Qxe4 Bd6 14. d4 f5 15.
>>Qc2
>>
>>[D]r2q1rk1/2p3pp/p2b4/1p1Pnp2/3P2b1/1BP5/PPQ2PPP/RNB1R1K1 b - - 0 15
>>
>>Chessprograms are strong in tactics (so they say...)
>>How fast is your engine finding 15...Nf3+?
>>
>>Mihaly
>
>I immediately knew: This is a position for Chessmaster and especially for AntiCM
>settings.
>Here you go:
>
>r2q1rk1/2p3pp/p2b4/1p1Pnp2/3P2b1/1BP5/PPQ2PPP/RNB1R1K1 b - - 0 1
>
>Analysis by AntiCM:
>
>15...Ng6 16.h3 Re8 17.Re6
>  ±  (1.02)   Depth: 3   00:00:00
>15...Ng6 16.h3 Re8 17.Re6
>  ±  (1.02)   Depth: 4   00:00:00
>15...Ng6 16.h3 Re8 17.Be3 f4 18.hxg4 fxe3 19.Rxe3 Rxe3 20.fxe3
>  ±  (1.14)   Depth: 5   00:00:00
>15...Ng6 16.h3 Bh5 17.a4 Nf4 18.axb5 axb5
>  ±  (1.05)   Depth: 6   00:00:00  41kN
>15...Nd7 16.Qd3 Qh4 17.h3 Bh5 18.a4 Rae8 19.Re6
>  ±  (1.01)   Depth: 6   00:00:00  55kN
>15...Nd7 16.h3 Bh5 17.c4 Re8 18.Be3 Qg5 19.Qd2
>  ±  (1.00)   Depth: 7   00:00:00  143kN
>15...Nd7 16.h3 Bh5 17.c4 Re8 18.Rxe8+ Qxe8 19.Bd2 Bg6 20.Nc3 f4
>  ±  (0.99)   Depth: 8   00:00:01  303kN
>15...Ng6 16.Nd2 Qh4 17.Nf1 Rfe8 18.Be3 f4 19.Bd2 Qf6 20.Qd3
>  ±  (0.81)   Depth: 8   00:00:03  631kN
>15...Ng6 16.h3 Qh4 17.Qd3 Bh5 18.Qf1 Nf4 19.a4 Rae8 20.axb5 Rxe1 21.Qxe1 axb5
>22.Bxf4 Qxf4
>  ±  (0.71)   Depth: 9   00:00:05  1207kN
>15...Ng6 16.h3 Qh4 17.Qd3 Bh5 18.Bd1 Bxd1 19.Qxd1 Rfe8 20.Re6 Rxe6 21.dxe6
>  ²  (0.70)   Depth: 10   00:00:11  2559kN
>15...Nf3+ 16.gxf3 Qh4 17.fxg4 Qxh2+ 18.Kf1 f4 19.Ke2 Rfe8+ 20.Kd1 Rxe1+ 21.Kxe1
>Re8+ 22.Be3 fxe3 23.Qf5 exf2+ 24.Kd1
>  =  (-0.06)   Depth: 10   00:00:17  4169kN
>15...Nf3+ 16.gxf3 Qh4 17.Re5 Bxe5 18.dxe5 Bxf3 19.Nd2 Qg5+ 20.Kf1 Bg2+ 21.Ke1 f4
>22.d6+ Kh8 23.f3 Bh3 24.Qd3 Qg1+ 25.Nf1 cxd6 26.exd6
>  =  (-0.18)   Depth: 11   00:00:36  9268kN
>15...Nf3+ 16.gxf3 Qh4 17.Re5 Bxe5 18.dxe5 Bxf3 19.Nd2 Qg5+ 20.Kf1 Bg2+ 21.Ke1 f4
>22.e6 Rad8 23.f3 Qh5 24.Ke2 Qxh2
>  =  (-0.11)   Depth: 12   00:01:02  16741kN
>15...Nf3+ 16.gxf3 Qh4 17.Re5 Bxe5 18.dxe5 Bh3 19.d6+ Kh8 20.Be6 Qh5 21.Qd2 Qg6+
>22.Qg5 Qxe6 23.Qe7 Qg6+ 24.Qg5
>  µ  (-0.99)   Depth: 13   00:02:44  44695kN
>
>17 secs ! on a mere AMD 2000+
>Now try to beat that with your Duals and Quads. :-)
>
>Meanwhile -2.56
>
>Michael

I do not need it.
old software and old hardware is enough.

Junior7(A1000) needs less than 1 second for 15...Nf3+(only 114 knodes)

Weibull - End
r2q1rk1/2p3pp/p2b4/1p1Pnp2/3P2b1/1BP5/PPQ2PPP/RNB1R1K1 b - - 0 1

Analysis by Junior 7:

15...Nf3+ 16.gxf3 Bxf3 17.Re6
  ±  (1.38)   Depth: 3   00:00:00
15...Nd7 16.h3 Bh5
  ±  (0.91)   Depth: 3   00:00:00
15...Ng6 16.h3 Bh5
  ±  (0.89)   Depth: 3   00:00:00
15...Ng6 16.h3 Bh5 17.Re6 f4
  ²  (0.65)   Depth: 6   00:00:00  1kN
15...Ng6 16.h3 Bh5 17.Re6 f4 18.Nd2
  ²  (0.67)   Depth: 9   00:00:00  31kN
15...Nd7 16.f4 Re8 17.Re6 Nf8 18.Rxe8 Qxe8 19.Bd2
  ²  (0.65)   Depth: 9   00:00:00  71kN
15...Nf3+ 16.gxf3 Bxf3 17.Qd3 Bxh2+ 18.Kf1 Be4 19.Qh3 Qd6 20.Bg5
  ²  (0.56)   Depth: 9   00:00:00  114kN
15...Nf3+ 16.gxf3 Qh4 17.fxg4 Qxg4+ 18.Kf1 Qh3+ 19.Ke2 Rfe8+ 20.Be3 f4 21.Kd2
  ²  (0.58)   Depth: 12   00:00:03  2173kN
15...Nf3+!
  ²  (0.28)   Depth: 15   00:00:15  9753kN
15...Nf3+ 16.gxf3 Qh4 17.fxg4 Qxh2+ 18.Kf1 f4 19.f3 Qh1+ 20.Kf2 Qh4+ 21.Kf1
  =  (0.00)   Depth: 17   00:03:07  114345kN

(Blass, Tel-Aviv 17.09.2003)


Uri



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