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Subject: How deep to see Zugzwang?

Author: Joshua Lee

Date: 17:01:20 10/10/02


I was looking at this position:
SUNE position
Cortlever - Good Knight vs Bad Bishop III
8/6b1/4k2p/p1p1p1p1/2P1K1P1/PP3N1P/8/8 w - - 0 1

Analysis by Fritz 7:

1.Nd2!
  ±  (0.97)   Depth: 11/20   00:00:00  165kN
1.Nd2 Bf6 2.Nf1 Be7 3.Ne3 Bd6 4.Nf5 Bf8 5.Ng3 Bd6
  ±  (1.00)   Depth: 12/20   00:00:00  195kN
1.Nd2 Bf6 2.Nf1 Be7 3.Ne3 Bd6 4.Nf5 Bf8 5.Kd3 Bd6 6.Ke3 a4 7.bxa4
  ±  (0.91)   Depth: 13/22   00:00:00  301kN
1.Nd2!
  ±  (1.19)   Depth: 14/23   00:00:01  548kN
1.Nd2--
  ±  (0.91)   Depth: 15/24   00:00:01  751kN
1.Nd2
  ±  (0.91)   Depth: 15/24   00:00:01  797kN
1.Ne1!
  ±  (0.94)   Depth: 15/24   00:00:02  945kN
1.Ne1!
  ±  (1.09)   Depth: 15/24   00:00:02  1103kN
1.Ne1--
  ±  (0.81)   Depth: 16/29   00:00:04  2005kN
1.Ne1
  ±  (0.81)   Depth: 16/29   00:00:04  2092kN
1.Ng1!
  ±  (0.84)   Depth: 16/29   00:00:05  2679kN
1.Ng1!
  ±  (1.00)   Depth: 16/29   00:00:06  3348kN
1.Ng1!
  ±  (1.28)   Depth: 17/30   00:00:10  5641kN, tb=2
1.Ng1--
  ±  (1.00)   Depth: 18/28   00:00:14  7477kN, tb=2
1.Ng1
  ±  (1.00)   Depth: 18/28   00:00:14  7761kN, tb=2
1.Nd2!
  ±  (1.03)   Depth: 18/28   00:00:15  8361kN, tb=2
1.Nd2!
  ±  (1.19)   Depth: 18/28   00:00:16  8831kN, tb=2
1.Ne1!
  ±  (1.22)   Depth: 18/34   00:01:23  50747kN, tb=12
1.Ne1!
  +-  (1.50)   Depth: 19/30   00:01:36  57921kN, tb=17
1.Ne1!
  +-  (1.78)   Depth: 20/32   00:02:14  79405kN, tb=35
1.Ne1--
  +-  (1.50)   Depth: 21/36   00:03:21  118756kN, tb=180
1.Ne1
  +-  (1.50)   Depth: 21/38   00:04:05  144270kN, tb=183
1.Nd2!
  +-  (1.53)   Depth: 21/38   00:04:16  150602kN, tb=183
1.Nd2!
  +-  (1.81)   Depth: 22/34   00:06:56  245726kN, tb=272
1.Nd2--
  +-  (1.53)   Depth: 23/36   00:08:12  288827kN, tb=609
1.Nd2
  +-  (1.53)   Depth: 23/38   00:11:09  400407kN, tb=690
1.Nd2!
  +-  (1.81)   Depth: 24/38   00:26:21  957161kN, tb=2046
1.Nd2--
  +-  (1.53)   Depth: 25/40   00:43:42  1596470kN, tb=4945
1.Nd2
  +-  (1.53)   Depth: 25/42   01:03:10  2322121kN, tb=6250
1.Nd2--
  ±  (1.25)   Depth: 26/45   02:02:58  4505582kN, tb=18462
1.Nd2
  ±  (1.25)   Depth: 26/45   02:08:06  4725169kN, tb=18554
1.Ne1!
  ±  (1.28)   Depth: 26/45   02:10:23  4802823kN, tb=18735
1.Ne1!
  +-  (1.44)   Depth: 26/45   02:12:43  4883628kN, tb=19100
1.Ne1!
  +-  (1.72)   Depth: 27/42   03:46:53  8377731kN, tb=50224

(Lee, Kingpawn 10.10.2002)

The Solution Given is 1. h4 which ends up being played in lines starting with
Fritz's 1. Ne1   On 1. h4 a plus score of over 1.72 will not be given way untill
12 plus moves into the combo.  Is this a problem with all programs ? Someone
please explain



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