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Subject: 2 Openings positions. Avoidmove and bestmove.

Author: Mikael Bäckman

Date: 11:47:41 01/16/04



What say your engines? How long to avoid Nxc7??

[D]r1b1k1nr/pppp1ppp/2n5/1Nb5/4P2q/8/PPP2PPP/RNBQKB1R w KQkq - 0 6 am Nxc7


Chepla v0.28 on AMD 1292 Mhz

  -1.61        7   0.0 Nb5a3 1/4
  -1.41       13   0.0 Nb5c3 1/2
   4.45       39   0.0 Nxc7+ Kd8 1/4
   4.45      138   0.0 Nxc7+ Kd8 Nxa8 2/5
   3.87      711   0.0 Nxc7+ Kd8 Ke2 3/8
   3.89       1k   0.0 Qd4 3/3
   3.89       1k   0.0 Qd4? 3/2
  -5.21       1k   0.0 Qd4 3/8
   1.31       2k   0.0 Nxc7+ Kf8 Be3 Bxe3 3/11
   1.38       5k   0.0 Nxc7+ Kf8 Qe2 Nd4 4/10
   1.37      17k   0.1 Nxc7+ Kf8 Qe2 Rb8 Be3 d6 5/14
   1.18      93k   0.2 Nxc7+ Kd8 Bg5+ Qxg5 Nxa8 Qf6 Qd2 6/15
   1.17     244k   0.5 Nxc7+ Kd8 Bg5+ Qxg5 Nxa8 Qf4 f3 Qe3+ 7/16
   0.84     527k   1.1 Nxc7+ Kd8 Bg5+ Qxg5 Nxa8 Qf6 Kd2 Qxb2 e5 8/18
   0.84     988k   2.1 Nxc7+? Kd8 Bg5+ Qxg5 Nxa8 Qf6 Kd2 Qxb2 e5 8/7
   0.83    1098k   2.3 Nxc7+ Kd8 Bg5+ Qxg5 Nxa8 Qf6 Qd2 Qxf2+ Qxf2 h5 8/18
   0.69    1757k   3.4 Nxc7+ Kd8 Bg5+ Qxg5 Nxa8 Nf6 h4 Qf4 f3 Qe3+ Be2 9/21
   0.58    4827k   9.4 Nxc7+ Kd8 Bg5+ Qxg5 Nxa8 Nf6 Nd2 Ng4 Qf3 Nxf2 h4 10/23
   0.25   12061k  23.7 Nxc7+ Kd8 Bg5+ Qxg5 Nxa8 Nf6 Nd2 Ng4 Bc4 Nxf2 Nf3 Qxg2
11/28
   0.30   35606k  78.7 Qf3 Kd8 Qf4 Qxf4 Bxf4 d6 Bc4 Nb4 Nb1a3 Be6 O-O 11/26


Some engines have problems with this successor position after Nxc7+ Kd8 Bg5+
Qxg5 Nxa8 Nf6 f3.

[D]N1bk3r/pp1p1ppp/2n2n2/2b3q1/4P3/5P2/PPP3PP/RN1QKB1R b KQ - 0 9 bm Nxe4


Chepla v0.28 on AMD 1292 Mhz

   1.65        1   0.0 Nb4 1/1
   1.63        5   0.0 Ne5 1/1
   1.51       29   0.0 Bd4 1/1
   1.44       41   0.0 Re8 1/1
   1.70      120   0.0 Re8 Nc3 2/5
   1.69      243   0.0 b5 Nc3 2/5
   0.61      461   0.0 Qe3+! Be2 Qf2+ Kd2 2/8
   0.61      868   0.0 Qe3+ Be2 Qf2+ Kd2 Qxg2 3/9
   0.61       4k   0.0 Qe3+ Be2 Qf2+ Kd2 Qe3+ Ke1 Qf2+ Kd2 4/12
   0.00       9k   0.0 Qe3+! Be2 Qf2+ Kd2 Qe3+ Ke1 Qf2+ Kd2 5/7
   0.00      23k   0.0 Qe3+ Be2 Qf2+ Kd2 Qe3+ Ke1 Qf2+ Kd2 6/15
   0.00      96k   0.1 Qe3+ Be2 Qf2+ Kd2 Qe3+ Ke1 Qf2+ Kd2 7/17
   0.00     295k   0.5 Qe3+ Be2 Qf2+ Kd2 Qe3+ Ke1 Qf2+ Kd2 8/20
   0.00     940k   1.4 Qe3+ Be2 Qf2+ Kd2 Qe3+ Ke1 Qf2+ Kd2 9/22
  -0.15    3411k   5.6 Qe3+ Be2 b6 Rf1 Bb7 Nxb6 Bxb6 g3 Qc5 Nc3 Ke8 10/26
  -0.33    5749k   9.3 Nxe4! fxe4 Qh4+ Kd2 Qf4+ Kc3 Qe5+ Kd2 Qxb2 Nc3 Bd4 Qe1
Bxc3+ Ke3 10/26
  -0.32    7632k  12.5 Nxe4 fxe4 Qh4+ Kd2 Qf4+ Kc3 Qe5+ Kd2 Qxb2 Na3 Bd4 Bd3
Qb4+ Ke2 Bxa1 11/24
  -0.65   25612k  42.7 Nxe4! fxe4 Qh4+ Kd2 Qf4+ Kc3 Qe5+ Kd2 Qxb2 Na3 Bd4 Bc4
Qxa3 Nb6 12/26
  -0.88   43551k  71.1 Nxe4 fxe4 Qh4+ Kd2 Qf4+ Kc3 Qe5+ Kd2 Qxb2 Na3 Bd4 Bd3
Qxa3 Rb1 Bc3+ Ke2 Qxa2 13/31





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