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Subject: Re: Leiden Testposition

Author: Gian-Carlo Pascutto

Date: 03:26:04 06/05/02

Go up one level in this thread


On June 05, 2002 at 06:04:53, Gerd Isenberg wrote:

>On June 05, 2002 at 05:45:39, Gian-Carlo Pascutto wrote:
>>Playing out Nf7:
>>
>
>[D] r2bk3/1p2nn1p/p2Q2p1/8/6P1/4B3/PqP2RBP/6K1 w - - 0 1
>
>
>why not Qe6 instead of Qf4?
>
>9/16 0:09.64 61+ 1.Qe6 Ne5 2.Kh1 Nxg4 3.Qxg4
>with increasing score > 1.
>
>Zugzwang, extensions?

I don't know what makes the difference, but mine is very slow here:

New game
r2bk3/1p2nn1p/p3Q1p1/8/6P1/4B3/PqP2RBP/6K1 b - - 0 1

Analysis by Sjeng 12.14 b:

1...Ne5 2.Re2
  -+  (-2.30)   Depth: 2   00:00:00
1...Ne5 2.c4 Qb1+ 3.Rf1
  -+  (-2.16)   Depth: 3   00:00:00
1...Ne5 2.c4 Qb1+ 3.Rf1
  -+  (-2.16)   Depth: 3   00:00:00
1...Ne5 2.Bc5 Qa1+ 3.Rf1 Qc3
  -+  (-2.39)   Depth: 4   00:00:00
1...Ne5 2.Bc5 Qa1+ 3.Rf1 Qc3
  -+  (-2.39)   Depth: 4   00:00:00
1...Ne5 2.c4 Qa1+ 3.Rf1 Qc3 4.Bc5
  -+  (-2.28)   Depth: 5/15   00:00:01
1...Ne5 2.c4 Qa1+ 3.Rf1 Qc3 4.Bc5
  -+  (-2.28)   Depth: 5/18   00:00:01
1...Ne5 2.c4 Qa1+ 3.Rf1 Qc3 4.Bf4 Qd4+ 5.Kh1
  -+  (-2.49)   Depth: 6/18   00:00:02  557kN
1...Ne5 2.c4 Qa1+ 3.Rf1 Qc3 4.Bf4 Qd4+ 5.Kh1
  -+  (-2.49)   Depth: 6/24   00:00:03  582kN
1...Ne5 2.c4 Qa1+ 3.Rf1 Qc3 4.Bc5 Rb8 5.Bd6
  -+  (-2.21)   Depth: 7/24   00:00:04  1358kN
1...Ne5 2.c4 Qa1+ 3.Rf1 Qc3 4.Bc5 Rb8 5.Bd6
  -+  (-2.21)   Depth: 7/24   00:00:06  1454kN
1...Ne5 2.Kh1 g5 3.Qf6 h6 4.Qf8+ Kd7 5.Rd2+ Kc7 6.Rxd8 Rxd8 7.Qxe7+ Kc8 8.Qf6
  -+  (-1.82)   Depth: 8/24   00:00:11  5279kN
1...Ne5 2.Kh1 g5 3.Qf6 h6 4.Qf8+ Kd7 5.Rd2+ Kc7 6.Rxd8 Rxd8 7.Qxe7+ Kc8 8.Qf6
  -+  (-1.82)   Depth: 8/28   00:00:14  5944kN
1...Ne5
  µ  (-1.32)   Depth: 9/28   00:00:20  9702kN
1...Ne5 2.Kh1 g5 3.Bxg5 N5g6 4.Qf7+ Kd7 5.Qxh7 Qxa2 6.Rd2+ Kc8 7.c3
  µ  (-1.05)   Depth: 9/28   00:00:34  17480kN
1...Ne5 2.Kh1 g5 3.Bxg5 N5g6 4.Qf7+ Kd7 5.Qxh7 Qxa2 6.Rd2+ Kc8 7.c3
  µ  (-1.05)   Depth: 9/28   00:00:37  18517kN
1...Ne5 2.Kh1 g5 3.Bxg5 N5g6 4.Rf6 Nh8 5.Rf5 h5 6.Bf6
  µ  (-1.19)   Depth: 10/28   00:01:00  32788kN
1...Ne5 2.Kh1 g5 3.Bxg5 N5g6 4.Rf6 Nh8 5.Rf5 h5 6.Bf6
  µ  (-1.19)   Depth: 10/32   00:01:05  35495kN
1...Ne5
  ³  (-0.69)   Depth: 11/32   00:01:12  39197kN
1...Ne5 2.Kh1 g5 3.Bxg5 Qd4 4.Rf1 Qc5 5.Rf5 Bb6 6.Qxe7+ Qxe7 7.Bxe7 Kxe7 8.Rxe5+
Kf6
  ±  (0.82)   Depth: 11/34   00:03:19  109414kN
1...Ne5 2.Kh1 g5 3.Bxg5 Qd4 4.Rf1 Qc5 5.Rf5 Bb6 6.Qxe7+ Qxe7 7.Bxe7 Kxe7 8.Rxe5+
Kf6
  ±  (0.82)   Depth: 11/39   00:07:51  259957kN
1...Ne5 2.Kh1 g5 3.Bxg5 Qd4 4.Rf1 Qc5 5.Rf5 Bb6 6.Qxe7+ Qxe7 7.Bxe7 Nxg4 8.Bxb7
Ne3
  ±  (1.19)   Depth: 12/39   00:11:19  377283kN

--
GCP



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