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Subject: Re: Qe3? Shredder6 results.

Author: Ernst Walet

Date: 01:41:06 01/13/02

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With normal analysis Shredder6 sticks after a few seconds to Rxe8+, but in
multiple line mode it plays Qe3 rather fast and sticks to it.  Why does it not
find Qe3 in normal analysis mode, is it because it gets pruned away to fast?

Ernst.

New game
3Rrk1r/5p2/2q2p2/p4N1p/pb5P/8/1P2QPP1/3R2K1 w - - 0 1

Analysis by Shredder 6:

1.Qe3 Qe6 2.Qf3 Qe5 3.Qc6 Rg8 4.R1d4
  +-  (2.52)   Depth: 7/14   00:00:00  128kN
1.Qe3 Qe6 2.Qg3 Qxf5 3.Rxe8+ Kxe8 4.Qb8+ Ke7 5.Qxh8 Qg4
  +-  (2.38)   Depth: 8/16   00:00:02  682kN
1.Rxe8+ Qxe8 2.Qa6 Rh7 3.Qxf6 Bc5 4.Rd8 Rg7
  +-  (2.39)   Depth: 8/16   00:00:04  1072kN
1.Rxe8+ Qxe8 2.Qa6 Rh7 3.Qxf6 Bc5 4.Rd8 a3 5.bxa3
  +-  (2.74)   Depth: 8/16   00:00:04  1087kN
1.Rxe8+ Qxe8 2.Qa6 Rg8 3.Qxf6 Rxg2+ 4.Kxg2 Qe4+ 5.f3 Qe2+ 6.Kg3 Be1+ 7.Rxe1
Qxe1+ 8.Kf4 Qd2+ 9.Ke4 Qe2+ 10.Ne3
  +-  (3.69)   Depth: 8/16   00:00:04  1136kN
1.Rxe8+ Qxe8 2.Qa6 Rg8 3.Qxf6 Rxg2+ 4.Kh1 Bc5 5.Qh6+ Rg7 6.Nxg7 Bxf2
  +-  (3.94)   Depth: 9/18   00:00:04  1254kN
1.Rxe8+ Qxe8 2.Qa6 Rg8 3.Qxf6 Rxg2+ 4.Kf1 Rxf2+ 5.Kxf2 a3 6.Rd8 Bc5+ 7.Nd4 Bxd4+
8.Qxd4
  +-  (4.44)   Depth: 9/18   00:00:05  1319kN
1.Rxe8+ Qxe8 2.Qa6 Be7 3.Re1 Qd7 4.Nxe7 Qd2 5.Re2 Qc1+ 6.Kh2 Qc7+ 7.g3 Rh6
  +-  (4.54)   Depth: 9/18   00:00:05  1447kN
1.Rxe8+ Qxe8 2.Qa6 Be7 3.Re1 Qd7 4.Nxe7 Qd2 5.Re3 Qxb2 6.Qa8+ Qb8 7.Qxb8+ Kg7
8.Qxh8+ Kxh8
  +-  (4.78)   Depth: 10/20   00:00:08  2385kN
1.Rxe8+ Qxe8 2.Qa6 Be7 3.Rc1 Kg8 4.Qe2 Qd7 5.Nxe7+ Kg7 6.Rc3 a3 7.bxa3 Re8
8.Rg3+ Kh6
  +-  (4.84)   Depth: 11/22   00:00:18  5484kN
1.Rxe8+ Qxe8 2.Qa6 Be7 3.Rc1 Kg8 4.Qe2 Qd7 5.Nxe7+ Kg7 6.Rc3 a3 7.bxa3 Rg8
  +-  (5.09)   Depth: 12/24   00:00:35  10349kN
1.Rxe8+ Qxe8 2.Qa6 Be7 3.Rc1 Kg8 4.Qe2 Qd7 5.Nxe7+ Kg7 6.Rc3 a3 7.bxa3 a4 8.Rg3+
Kf8 9.Rg8+ Rxg8 10.Ng6+ fxg6 11.Qe7+ Qxe7
  +-  (5.09)   Depth: 12/24   00:00:41  12386kN
1.Rxe8+ Qxe8 2.Qa6 Be7 3.Rc1 Kg8 4.Qe2 Qd7 5.Nxe7+ Kg7 6.Rc3 a3 7.bxa3 a4 8.Kf1
Rg8 9.Rg3+ Kh6
  +-  (5.34)   Depth: 13/26   00:01:20  24276kN
1.Rxe8+ Qxe8 2.Qa6 Be7 3.Rc1 Bd8 4.Qd6+ Be7 5.Nxe7 Qxe7 6.Rc8+ Kg7 7.Qxe7 Rxc8
8.Qe2 Rb8 9.g4 hxg4 10.Qxg4+ Kh7 11.Qe4+ Kg7 12.Qg2+ Kh6
  +-  (5.70)   Depth: 13/26   00:01:59  36335kN
1.Rxe8+ Qxe8 2.Qa6 Be7 3.Rc1 Bd8 4.Qd6+ Be7 5.Nxe7 Qxe7 6.Rc8+ Kg7 7.Qxe7 Rxc8
8.Qe2 Rc1+ 9.Kh2 Rb1 10.g3 Kg6 11.Qc2+ Kh6
  +-  (5.73)   Depth: 14/28   00:04:37  85099kN

(Celeron 1.2GHz, 832MB hash, 3, 4 & 5 piece EGTB's 13.01.2002)


New game
3Rrk1r/5p2/2q2p2/p4N1p/pb5P/8/1P2QPP1/3R2K1 w - - 0 1

Analysis by Shredder 6:

1. +- (7.38): 1.Qe3 Qe6 2.Rxe8+ Qxe8 3.Qb6 Be7 4.Qc7 a3 5.bxa3 a4 6.Rd7 Qa8
7.Rxe7 Rh7 8.Nd6 Rh6 9.Rxf7+ Kg8 10.Qe7
2. +- (5.83): 1.Rxe8+ Qxe8 2.Qd3 Rh7 3.Qd8 a3 4.bxa3 Bxa3 5.Qxf6 Be7 6.Nxe7 Qxe7
7.Rd8+ Qxd8 8.Qxd8+ Kg7 9.Qg5+ Kf8 10.Qf5 Rh6
3. +- (5.81): 1.Qd3 Rg8 2.Rxe8+ Qxe8 3.Qd8 Rg6 4.Qc7 Rxg2+ 5.Kxg2 Qe4+ 6.Kh2
Qxf5 7.Qd8+ Kg7 8.Rg1+ Qg6 9.Rxg6+ fxg6 10.Qd7+ Kh6 11.Qxa4 Bd6+ 12.Kg2 Be5
13.Qa3

(Celeron 1.2GHz, 832MB hash, 3, 4 & 5 piece EGTB's 13.01.2002)



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