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Subject: Re: Deep Sacrifice from aCorrespondence game so far only HIARCS findsNxe5

Author: Ernst Walet

Date: 02:05:19 01/16/03

Go up one level in this thread


On January 15, 2003 at 20:26:03, ALI MIRAFZALI wrote:

>The follwing position is from the Correspondence Game between Alik Zilberberg
>(2590) and the 8th World Correspondence Champion Jorn Sloth (2620) of Denmark
>[D]r2nnk2/2pb4/3p1p2/1q1Pp1p1/2N1P1Pp/1NQ4P/4BP2/1R4K1 w
>Alik Zilberberg played 39.Nxe5!!  and the former World Champion Resigned after
>39....Qxe2 40.Nxd7+ Ke7 41.Rel Qb5 42.Nxf6 Nxf6 43.e5 dxe5 44.Rxe5+ Kf7 45.Rxg5
>Qb6 46.Rf5 Kg6 47.Nc5 Nxd5 48.Rxd5 Qb1+ 49.Kg2 Ra1 50.Rg5+ (1-0)
>HIARCS8 finds39.Nxe5!! after 1:42 running at 1800 MHZ.The list of programs that
>have failed even after a very long think include:Fritz Chessmaster Mchess Comet
>GNU chess and the list keeps growing...................

Shredder7 plays it at 4:22 on my Celeron 1200.

Ernst.


New game
r2nnk2/2pb4/3p1p2/1q1Pp1p1/2N1P1Pp/1NQ4P/4BP2/1R4K1 w - - 0 1

Analysis by Shredder 7:

1.Nxe5 Qxe2 2.Nxd7+ Kg8
  ±  (1.00)   Depth: 1/4   00:00:00
1.Nxe5 Qxe2 2.Nxd7+ Kg7
  ±  (1.06)   Depth: 1/12   00:00:00
1.Nxe5 Qxe2 2.Nxd7+ Kg7
  ±  (1.06)   Depth: 2/3   00:00:00
1.Nxe5 Qxe2 2.Nxd7+ Kg7
  ±  (1.06)   Depth: 3/5   00:00:00
1.Nxe5 Qxe2 2.Nxd7+ Ke7 3.Re1
  ±  (0.89)   Depth: 4/12   00:00:00
1.Nxe5 Ke7 2.Bxb5 dxe5
  ±  (1.14)   Depth: 5/15   00:00:00
1.Nxe5 Qa4 2.Nxd7+ Kg8
  +-  (1.64)   Depth: 5/15   00:00:00
1.Nxe5 Qxe2 2.Nxd7+ Kg7 3.Re1 Qb5
  +-  (1.71)   Depth: 5/15   00:00:00
1.Nxe5 Qxe2 2.Nxd7+ Kg7 3.Rb2 Qxe4 4.Qxf6+ Nxf6
  +-  (1.46)   Depth: 6/11   00:00:00
1.Nxe5 Qxe2 2.Nxd7+ Ke7 3.Re1 Qb5 4.Qe5+ dxe5 5.d6+ Kxd7
  ±  (0.96)   Depth: 6/18   00:00:00
1.Nxe5 Qxe2 2.Nxd7+ Ke7 3.Re1 Qb5 4.Nxf6 Nxf6 5.Qxc7+ Nd7
  ³  (-0.48)   Depth: 6/18   00:00:00
1.Nbd2 Ke7
  ³  (-0.47)   Depth: 6/18   00:00:00
1.Nbd2 Ke7 2.Rxb5 Ra1+ 3.Qxa1
  =  (-0.12)   Depth: 6/18   00:00:00
1.Nbd2 Qc5 2.Nb3 Qb5 3.Bd3 Qa4 4.Qxe5 fxe5
  =  (0.00)   Depth: 6/18   00:00:00
1.Qf3 Qa4
  =  (0.01)   Depth: 6/18   00:00:00
1.Qf3 Qb4 2.Nbd2 Qc5 3.Ne3 Ra2
  ²  (0.26)   Depth: 6/18   00:00:00
1.Bd3 Qa4 2.Ra1 Ng7
  ²  (0.27)   Depth: 6/18   00:00:00
1.Bd3 Qb8 2.Ra1 Rxa1+ 3.Nxa1 Kg7
  ²  (0.27)   Depth: 6/18   00:00:00
1.Bd3 Qb8 2.Nc5 Qc8 3.Nxd7+ Qxd7 4.Ne3 c5 5.Nf5
  =  (0.20)   Depth: 7/14   00:00:00  120kN
1.Bd3 Qb8 2.Nc5 Qc8 3.Nxd7+ Qxd7 4.Ne3 Ke7
  ²  (0.45)   Depth: 8/16   00:00:01  227kN
1.Bd3 Qb8 2.Nc5 Qc8 3.Nxd7+ Qxd7 4.Ne3 c5 5.dxc6 Nxc6 6.Nf5
  ²  (0.55)   Depth: 8/16   00:00:01  250kN
1.Bd3 Qb8 2.Nc5 Qc8 3.Nxd7+ Qxd7 4.Ne3 c5 5.dxc6 Nxc6 6.Qb4 Nxb4
  ²  (0.30)   Depth: 9/19   00:00:01  370kN
1.Bd3 Qb8 2.Nc5 Qc8 3.Nxd7+ Qxd7 4.Ne3 c5 5.Bb5 Qe7 6.Nf5
  ²  (0.30)   Depth: 9/19   00:00:01  397kN
1.Bd3 Qb8 2.Nc5 Qc8 3.Nxd7+ Qxd7 4.Ne3 c5 5.dxc6 Nxc6 6.Bb5 Rc8 7.Qb3
  ²  (0.50)   Depth: 10/20   00:00:03  759kN
1.Bd3 Qb8 2.Nc5 Qc8 3.Nxd7+ Qxd7 4.Ne3 c5 5.dxc6 Nxc6 6.Bb5 Nd4 7.Qb3 Nxb3
  =  (0.25)   Depth: 11/20   00:00:05  1258kN
1.Bd3 Qb8 2.Nc5 Qc8 3.Nxd7+ Qxd7 4.Nd2 c5 5.dxc6 Qxc6 6.Qb3 Qc5 7.Bb5 Rb8
  =  (0.14)   Depth: 11/24   00:00:07  1625kN
1.Bd3 Qb8 2.Nc5 Qc8 3.Nxd7+ Qxd7 4.Ne3 c5 5.dxc6 Qxc6 6.Qb2 Ne6 7.Qb3 Nf4 8.Qf7+
  =  (0.18)   Depth: 12/26   00:00:18  4347kN
1.Bd3 Qb8 2.Nc5 Qc8 3.Nxd7+ Qxd7 4.Bc2 Kg7 5.Ne3 c6 6.Nf5+ Kh8 7.dxc6 Nxc6 8.Qb3
Rb8 9.Ra1 Rxb3
  =  (0.12)   Depth: 13/28   00:00:38  9484kN
1.Bd3 Qb8 2.Nc5 Qc8 3.Nxd7+ Qxd7 4.Qb2 Kg7 5.Ne3 c6 6.dxc6 Nxc6 7.Bb5 Nc7 8.Nf5+
Kh8 9.Bxc6 Qxc6 10.Qb4
  =  (0.10)   Depth: 14/32   00:01:19  20107kN
1.Bd3 Qb8 2.Nc5 Qc8 3.Nxd7+ Qxd7 4.Bc2 Kg7 5.Kh2 Ra7 6.Na5 Ra6 7.Kg1 c5 8.dxc6
Nxc6 9.Qb4
  =  (0.11)   Depth: 15/32   00:02:34  39831kN
1.Nxe5 Qxe2 2.Nxd7+ Ke7 3.Re1 Qb5 4.Nxf6 Nxf6 5.e5 dxe5 6.Rxe5+ Kf7 7.Rf5 Qa6
8.Qxc7+ Kg6 9.Qe7 Nf7 10.d6 Qxd6 11.Rxf6+ Kg7 12.Rxd6 Ra1+
  =  (0.12)   Depth: 15/44   00:04:22  66853kN
1.Nxe5 Qxe2 2.Nxd7+ Ke7 3.Re1 Qb5 4.Nxf6 Nxf6 5.e5 dxe5 6.Rxe5+ Kf7 7.Rf5 Qa6
8.Qxc7+ Kg6 9.Qe7 Nf7 10.d6 Qxd6 11.Rxf6+
  ²  (0.39)   Depth: 15/44   00:06:28  100066kN

(Celeron 1.2GHz, 512MB hash, 3, 4 and 5 piece EGTB's 16.01.2003)



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