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Subject: Re: Too difficult for programs, or something else?

Author: Slater Wold

Date: 14:31:29 12/04/01

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On December 03, 2001 at 21:05:39, Andrew Smith wrote:

>[D]r1nq1r1k/p2b1pbp/1p4p1/2pNp3/RP1PP3/4BN1P/2P2PP1/2QR2K1 w KQkq - 0 1
>
>dxe5!! apparently gives white a huge adavantage in this position, followed by
>Bg5. The line looks to be very long. I played around the position with gambit
>tiger and forced the move and followed its analysis some ten moves deep, until
>it finally showed a positive score for white. According to this it would have
>taken more than twenty plies (!?) in the original position. Can any program find
>this move? Is it even possible?

Supposed to be 8 hours; went for 4 and moved:

Deep Junior 7 - W,S
r1nq1r1k/p2b1pbp/1p4p1/2pNp3/RP1PP3/4BN1P/2P2PP1/2QR2K1 w - - 0 1

Analysis by Deep Junior 7:

1.Ra1 cxd4 2.Bh6
  ²  (0.47)   Depth: 3   00:00:00
1.Ra1 cxd4 2.Bg5 f6 3.Bh6 Nd6
  ²  (0.58)   Depth: 6   00:00:00  4kN
1.Ra1 exd4 2.Bg5 f6 3.Bh6 Nd6 4.bxc5 bxc5
  ²  (0.46)   Depth: 9   00:00:00  76kN
1.Ra1 cxd4 2.Bh6 Re8 3.c3 Nd6 4.cxd4 exd4 5.Nxd4 Nxe4
  ²  (0.33)   Depth: 12   00:00:01  1220kN
1.Ra1 exd4 2.Bf4 Bc6 3.bxc5 Bxd5 4.exd5 bxc5 5.c4 dxc3 6.Ne5 Nb6
  ²  (0.28)   Depth: 15   00:00:08  14745kN
1.Ra1 exd4 2.Bg5 f6 3.Bf4 Bc6 4.Nc7 g5 5.Bg3 Bxe4 6.Re1 Bd5 7.bxc5 bxc5 8.Nxa8
Bxa8 9.Qa3
  ²  (0.43)   Depth: 18   00:01:20  154674kN
1.Bg5!
  ²  (0.58)   Depth: 18   00:06:31  623838kN
1.Bg5 f6 2.Bxf6 Bxf6 3.dxe5 Bg7 4.Nf6 Bxa4 5.Rxd8 Rxd8 6.Ng5 Be8 7.Ne6 Ne7
8.bxc5 Rdc8 9.Qf4 bxc5 10.Qh4
  ²  (0.62)   Depth: 21   00:32:49  3560109kN
1.Bg5 f6 2.Bxf6 Bxf6 3.dxe5 Bg7 4.Nf6 Bxa4 5.Rxd8 Rxd8 6.Ng5 Be8 7.Ne6 Ne7
8.Nxd8 Rxd8 9.bxc5 bxc5 10.Qa3
  ²  (0.69)   Depth: 23   02:43:34  725226kN
1.Bg5 f6 2.Bxf6 Bxf6 3.dxe5 Bg7 4.Nf6 Bxa4 5.Rxd8 Rxd8 6.Ng5 Be8 7.Ne6 Ne7
8.Nxd8 Rxd8 9.bxc5 bxc5 10.Qa3
  ²  (0.69)   Depth: 23   04:09:57  1702486kN

(W,  04.12.2001)

I will make the move dxe5 and see what comes up, a little later.



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