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Subject: Re: Interesting position from Hossa - Arasan -- Junior 6a

Author: Jason Williamson

Date: 09:56:48 10/06/00

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On October 05, 2000 at 22:48:40, Steffen Jakob wrote:

>Hi!
>
>Here comes a position from a game Hossa - Arasan:
>
>[D]r3r1k1/3q2p1/2p1ppQP/2P3p1/1p1P4/pPb1RN2/P4P2/1K5R w
>
>There are two moves which are winning fast: Ne5 and Nxg5 (e.g. 1.Nxg5 fxg5 2.
>Reh3 +-). Hossa missed those moves and lost the game. First I thought that this
>should be very easy to find for a comp but after having talked to some
>programmers I saw that other programs also need more time than I expected (at
>least too long for a blitz game). How long does your favourite program take to
>see either Ne5 or Nxg5 with a +- score (something like +0.5 doesnt count)?
>
>Greetings,
>Steffen.

New position
r3r1k1/3q2p1/2p1ppQP/2P3p1/1p1P4/pPb1RN2/P4P2/1K5R w - - 0 1

Analysis by Junior 6.0:

1.Rxc3 bxc3 2.h7+ Kh8
  -+  (-1.48)   Depth: 3   00:00:00
1.h7+ Kh8 2.Rd3 Red8 3.Rdd1
  ³  (-0.38)   Depth: 6   00:00:00  8kN
1.h7+ Kh8 2.Rd3 Red8 3.Rdd1
  ³  (-0.38)   Depth: 6   00:00:00  8kN
1.h7+ Kh8 2.Rd3 Red8 3.Rdd1
  ³  (-0.38)   Depth: 6   00:00:00  8kN
1.h7+ Kh8 2.Rd3 Red8 3.Rdd1
  ³  (-0.38)   Depth: 6   00:00:00  8kN
1.Re2 Red8 2.h7+ Kh8 3.Re4
  ³  (-0.26)   Depth: 6   00:00:00  17kN
1.Re2 Rad8 2.Re4 Rf8 3.h7+ Kh8
  =  (-0.16)   Depth: 9   00:00:00  49kN
1.Re2 Rad8 2.Re3 Qa7 3.h7+ Kh8 4.Rh3 e5
  =  (-0.24)   Depth: 12   00:00:01  644kN
1.h7+ Kh8 2.Qxg5 fxg5 3.Ne5 g6 4.Nxd7 Bxd4 5.Re4 Bxf2 6.Ne5 Bh4 7.Nxc6 Kxh7
  =  (-0.20)   Depth: 12   00:00:04  1785kN
1.Re5 Qa7 2.h7+ Kh8 3.Re4 Rad8 4.Re3 e5
  =  (0.01)   Depth: 12   00:00:10  3831kN
1.Re5!
  ²  (0.31)   Depth: 14   00:00:21  7641kN
1.Re5 Bxd4 2.Rd1 fxe5 3.Nxe5 Qb7 4.h7+ Kh8 5.Nf7+ Qxf7
  ²  (0.59)   Depth: 14   00:00:40  14065kN
1.Re5 Bxd4 2.Rd1 fxe5 3.Nxe5 Qc7 4.h7+ Kh8 5.Nf7+ Qxf7
  ²  (0.67)   Depth: 15   00:01:25  27899kN
1.Ne5!
  ±  (0.89)   Depth: 15   00:01:45  33438kN
1.Ne5! fxe5 2.Reh3 Qf7 3.h7+ Kh8 4.Qxf7 exd4 5.Rd3 Rf8 6.Qxe6 Rxf2 7.Qxc6 Raf8
8.Qg6
  +-  (4.68)   Depth: 15   00:02:05  39351kN
1.Ne5 fxe5 2.Reh3 Qf7 3.h7+ Kh8 4.Qxf7 exd4 5.Rd3 Rad8 6.f3 e5 7.Kc2
  +-  (4.81)   Depth: 16   00:02:46  49923kN
1.Ne5 fxe5 2.Reh3 Qf7 3.h7+ Kh8 4.Qxf7 exd4 5.Rg1 Rf8 6.Qxe6 Rxf2 7.Qxc6 Raf8
8.Qg6 Rb2+ 9.Kc1 Bd2+ 10.Kd1
  +-  (4.99)   Depth: 17   00:04:38  79583kN

(Williamson, Vancouver 06.10.2000)



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