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

Author: Mike Byrne

Date: 18:11:15 01/15/03

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...................

Chess Tiger 15 P4 1.8G Xeon 20 seconds

00:00:00.4	0.40	8	122532	Bd3 Qb7 Nc5 Qc8 Nxd7+ Qxd7 Ne3 Ra2 Nf5
00:00:00.5	0.40	8	140315	Bd3 Qb7 Nc5 Qc8 Nxd7+ Qxd7 Ne3 c5 dxc6ep Qxc6 Nc4
00:00:01.0	0.46	9	291273	Bd3 Qb7 Nc5 Qc8 Nxd7+ Qxd7 f3 Ra2 Qb3 Ra4 Qc3
00:00:01.8	0.42	10	557290	Bd3 Qb7 Nc5 Qc8 Nxd7+ Qxd7 f3 Ra2 Qb3 Ra4 Nb2 Rd4
00:00:03.5	0.40	11	1035070	Bd3 Qb7 Nc5 Qc8 Nxd7+ Qxd7 f3 Ra7 Ne3 c5 dxc6ep Qxc6
Nc4 Qc5+ Kf1
00:00:08.2	0.32	12	2450774	Bd3 Qb7 Nc5 Qc8 Nxd7+ Qxd7 Rb3 Ra7 f3 c5 dxc6ep Nxc6
Nb6 Qf7 Nd5
00:00:17.4	0.32	13	5262131	Bd3 Qb7 Nc5 Qc8 Nxd7+ Qxd7 f3 Ra7 Qc2 c5 dxc6ep Qxc6
Qf2 Qc5 Qxc5 dxc5 Rb8
00:00:20.5	0.38	13	6299935	Nxe5 Qxe2 Nxd7+ Ke7 Nd4 Qa2 Qd3 Kxd7 e5 Qxd5 Qh7+ Kc8
Qf5+ Ne6 Nxe6 dxe5
00:00:28.9	0.60	14	9014125	Nxe5 Qxe2 Nxd7+ Ke7 Nd4 Qa2 Qd3 Kxd7 e5 fxe5 Qh7+ Ng7
Qxg7+ Kc8 Qh7 exd4 Qf5+
00:00:48.5	0.90	15	15670593	Nxe5 Qxe2 Nxd7+ Ke7 Re1 Qb5 e5 Kxd7 exf6 Nxf6 Qxf6
Qxd5 Nd4 Ra3 Re7+ Kc8 Kh2
00:01:08.9	0.62	16	22739427	Nxe5 Qxe2 Nxd7+ Ke7 Re1 Qb5 e5 Kxd7 exf6 Ra4 Re7+
Kc8 f7 Nxf7 Rxf7 Ra3 Rf8 Rxb3

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

Analysis by Deep Junior 7 running on a dual 1.8 Ghz Xeon (with favor sacrifices
box checked) 3 seconds:

1.Nxe5 Qxe2 2.Nxd7+ Kg7
  ²  (0.43)   Depth: 3   00:00:00
1.Nxe5 Qxe2 2.Nxd7+ Kg7
  ²  (0.43)   Depth: 3   00:00:00
1.Nxe5 Qxe2 2.Nxd7+ Kg7
  ²  (0.43)   Depth: 3   00:00:00
1.Nxe5 Qxe2 2.Nxd7+ Ke7 3.Re1 Qb5 4.Nxf6 Nxf6 5.Qxc7+
  ³  (-0.55)   Depth: 6   00:00:00  16kN
1.Kh2 Ra2 2.Rb2 Qa4 3.Rxa2 Qxa2
  =  (-0.18)   Depth: 6   00:00:00  18kN
1.Nbd2 Qc5 2.Nb3 Qa7 3.Ra1 Ba4
  =  (-0.06)   Depth: 6   00:00:00  30kN
1.Bf1 Qb8 2.Bd3
  =  (0.11)   Depth: 6   00:00:00  31kN
1.Bf1 Qb8 2.Nbd2 Qa7 3.Be2 Qa2
  =  (-0.04)   Depth: 9   00:00:00  61kN
1.Bd3 Qa4 2.Ra1 Qxb3 3.Qxb3 Rxa1+ 4.Kh2 Re1
  =  (0.03)   Depth: 9   00:00:00  201kN
1.Bd3 Qb8 2.Nc5 Qc8 3.Nxd7+ Qxd7 4.Ra1 Ra4 5.Be2 Rxa1+ 6.Qxa1
  =  (0.16)   Depth: 12   00:00:00  908kN
1.Nxe5!
  ²  (0.33)   Depth: 12   00:00:03  3598kN
1.Nxe5 Qxe2 2.Nxd7+ Ke7 3.Re1 Qb5 4.Nxf6 Nxf6 5.e5 Nd7 6.e6 Nb6 7.Qxc7+ Ke8
8.Nd4
  ²  (0.52)   Depth: 12   00:00:05  7152kN
1.Nxe5 Qxe2 2.Nxd7+ Ke7 3.Re1 Qb5 4.Nxf6 Nxf6 5.e5 dxe5 6.Rxe5+ Kd6 7.Re3 Nd7
8.Nd4 Qb1+ 9.Re1 Qb7
  ±  (0.71)   Depth: 15   00:00:41  62433kN

(Byrne, Secane, PA USA 15.01.2002)


Normal Deep Junior 7

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

Analysis by Deep Junior 7 on a dual 1.8 Ghz 25 seconds:

1.f3 Qa4
  =  (0.03)   Depth: 3   00:00:00
1.Nxe5 Qxe2 2.Nxd7+ Kg7
  ²  (0.43)   Depth: 3   00:00:00
1.Nxe5 Qxe2 2.Nxd7+ Kg7
  ²  (0.43)   Depth: 3   00:00:00
1.Nxe5 Qxe2 2.Nxd7+ Ke7 3.Re1 Qb5 4.Nxf6 Nxf6 5.Qxc7+
  ³  (-0.55)   Depth: 6   00:00:00  12kN
1.Kh2 Ra2 2.Rb2 Qa4 3.Rxa2 Qxa2
  =  (-0.18)   Depth: 6   00:00:00  14kN
1.Nbd2 Qc5 2.Nb3 Qa7 3.Ra1 Ba4
  =  (-0.06)   Depth: 6   00:00:00  22kN
1.Bf1 Qb8 2.Bd3
  =  (0.11)   Depth: 6   00:00:00  23kN
1.Bf1 Qb8 2.Nbd2 Qa7 3.Be2 Qa2
  =  (-0.04)   Depth: 9   00:00:00  45kN
1.Bd3 Qa4 2.Ra1 Qxb3 3.Qxb3 Rxa1+ 4.Kh2 Re1
  =  (0.03)   Depth: 9   00:00:00  130kN
1.Bd3 Qb8 2.Nc5 Qc8 3.Nxd7+ Qxd7 4.Ra1 Ra4 5.Be2 Rxa1+ 6.Qxa1
  =  (0.16)   Depth: 12   00:00:00  563kN
1.Bd3 Qb8 2.Nc5 Qc8 3.Nxd7+ Qxd7 4.Ne3 c6 5.Nf5 cxd5 6.exd5
  =  (0.23)   Depth: 15   00:00:04  6170kN
1.Nxe5!
  ²  (0.46)   Depth: 15   00:00:25  26692kN
1.Nxe5 Qxe2 2.Nxd7+ Ke7 3.Re1 Qb5 4.Nxf6 Nxf6 5.e5 dxe5 6.Rxe5+ Kf7 7.d6 Qc6
8.Re7+ Kg6 9.Qd3+ Kh6 10.dxc7
  ²  (0.47)   Depth: 17   00:02:06  173736kN

(Byrne, Secane, PA USA 15.01.2002)




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