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Subject: Re: Interesting position

Author: Djordje Vidanovic

Date: 06:58:50 03/27/00

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On March 27, 2000 at 08:55:34, Enrique Irazoqui wrote:

>On March 27, 2000 at 07:41:33, Josh Strayhorn wrote:
>
>>2k4r/1pp2p2/p2q2p1/Q2Pbp1p/6b1/2NB3P/PPP2PP1/4R2K w - - 0 0
>>
>>How long does it take your program to find Nb5 here?
>>
>>I imagine that most programs would probably prefer other moves initially, for
>>instance f3.
>>
>>By the way, the proper continuation is 1. Nb5!! Qf6 2. Rxe5! Qxe5 3. d6!
>
>Fritz, Junior, Hiarcs and Nimzo find Nb5 in less than 10 seconds on a P600e.
>
>Enrique

Analyses by SMP Crafty, Fritz 6/66 and Deep Junior follow.  They all see 1.Nb5
in a couple of seconds.

Crafty 17.07 P4 - Vidanovic,D
Analysis by Crafty 17.07 P4:

1.Kg1 Kb8 2.hxg4 hxg4
  +-  (2.21)   depth: 5/13   00:00:00
1.Nb5
  +-  (2.61)   depth: 5/13   00:00:00
1.Nb5 Qf6 2.d6 Bxd6 3.Nxd6+ cxd6 4.Qc3+ Qxc3 5.bxc3 Kd7 6.hxg4 hxg4+
  +-  (1.43)   depth: 6/13   00:00:00  139kN
1.Kg1
  +-  (1.83)   depth: 6/13   00:00:00  195kN
1.Kg1 Bd4 2.hxg4 Qf4 3.Re2 hxg4
  +-  (2.18)   depth: 6/13   00:00:00  322kN
1.Kg1 Bh2+ 2.Kf1 Be5 3.a4 Re8 4.hxg4 hxg4
  +-  (2.28)   depth: 7/20   00:00:01  590kN
1.Kg1 Kb8 2.a3 Bd4 3.hxg4 Qf4 4.Re2 hxg4
  +-  (2.07)   depth: 8/20   00:00:03  1429kN
1.Nb5 Qf6 2.d6 Bxd6 3.Nxd6+ Qxd6 4.Qc3 f6 5.Kg1 Kd7 6.hxg4 hxg4
  +-  (2.09)   depth: 8/20   00:00:05  303kN
1.Nb5 Qf6 2.d6 Bxd6 3.Nxd6+ Qxd6 4.Qc3 f6 5.Kg1 Kd7 6.hxg4 hxg4
  +-  (2.49)   depth: 9/20   00:00:07  3065kN
1.Nb5 axb5 2.Qa8+ Kd7 3.Bxb5+
  +-  (3.79)   depth: 9/20   00:00:09  3613kN
1.Nb5 axb5 2.Qa8+ Kd7 3.Bxb5+
  +-  (3.79)   depth: 10/20   00:00:11  4443kN

(Vidanovic, Naissus 27.03.2000)



Analysis by Fritz 6 Test 66:

±  (1.34)   depth: 3/14   00:00:00  3kN
1.f3 Bxh3 2.gxh3 Rd8
  +-  (1.91)   depth: 3/14   00:00:00  4kN
1.f3 Bxh3 2.gxh3 Rd8
  +-  (1.72)   depth: 4/11   00:00:00  4kN
1.Nb5!
  +-  (2.13)   depth: 4/15   00:00:00  7kN
1.Nb5! Qf6
  +-  (2.44)   depth: 4/15   00:00:00  7kN
1.Nb5!
  +-  (2.13)   depth: 5/15   00:00:00  7kN
1.Nb5 Qf6 2.Rxe5
  +-  (2.06)   depth: 5/15   00:00:00  8kN
1.Nb5!
  +-  (2.44)   depth: 6/15   00:00:00  9kN
1.Nb5 Qf6 2.Rxe5 Qxe5 3.d6 Kb8 4.Qxc7+ Ka8
  +-  (2.44)   depth: 7/15   00:00:00  13kN
1.Nb5--
  +-  (2.13)   depth: 8/21   00:00:00  22kN
1.Nb5 Qf6 2.Rxe5 Qxe5 3.d6 Kb8 4.Qxc7+
  +-  (2.03)   depth: 8/29   00:00:00  33kN
1.Nb5!
  +-  (2.34)   depth: 9/21   00:00:00  52kN
1.Nb5 Qf6
  +-  (2.44)   depth: 9/22   00:00:00  61kN
1.Nb5 Qf6 2.Rxe5 Qxe5 3.d6 Kb8 4.Qxc7+ Ka8 5.Qc3
  +-  (2.22)   depth: 10/23   00:00:00  110kN
1.Nb5 axb5 2.Qa8+
  +-  (2.47)   depth: 11/29   00:00:02  775kN

(Vidanovic, Naissus 27.03.2000)


Analysis by Deep Junior 6.0:

1.hxg4 hxg4+ 2.Kg1 Rh2 3.a4
  +-  (1.55)   depth: 6   00:00:00  4kN
1.Ra1 f4 2.hxg4 hxg4+
  +-  (1.60)   depth: 6   00:00:00  11kN
1.Kg1 Re8 2.hxg4 Bh2+ 3.Kf1 Rxe1+ 4.Kxe1 hxg4
  +-  (1.72)   depth: 6   00:00:00  15kN
1.Kg1 f6 2.hxg4 hxg4 3.a4 Rh2
  +-  (1.48)   depth: 9   00:00:00  55kN
1.f3 Bg3 2.Rf1 Bxh3 3.gxh3 h4 4.Rg1
  +-  (1.58)   depth: 9   00:00:00  77kN
1.f3 f4 2.fxg4 hxg4 3.Ne4 Qe7 4.Nf2 gxh3 5.Nxh3 f3
  +-  (1.51)   depth: 12   00:00:03  2308kN
1.Kg1 Bd4 2.Qa4 Bxc3 3.bxc3 Qxd5 4.hxg4 hxg4 5.Re8+ Rxe8 6.Qxe8+ Qd8 7.Qxf7
  +-  (1.57)   depth: 12   00:00:06  2679kN
1.Nb5!
  +-  (1.88)   depth: 12   00:00:09  4387kN
1.Nb5! axb5 2.Qa8+ Kd7 3.Bxb5+ c6 4.Qxb7+ Kd8 5.Bxc6 f4 6.hxg4 hxg4+ 7.Kg1 Rh4
8.a4
  +-  (2.63)   depth: 12   00:00:13  6813kN

(Vidanovic, Naissus 27.03.2000)


*** Djordje





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