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Subject: Re: Another test position

Author: Richard Pijl

Date: 02:06:45 02/28/03

Go up one level in this thread


On February 26, 2003 at 14:38:41, Steffen Jakob wrote:

>Here is another one from Hossa - Fritz 8:
>
>[D]3r2k1/6pp/4bp2/8/1ppBP1P1/1q3P2/1P1R2KP/4Q3 b - - 0 39
>
>Fritz played 39... Rxd4 and was able to win the game with the b and c pawn.
>Nevertheless 39... Rxd4 is only a draw (please correct me if I am wrong) and
>therefore it should be avoided or at least evaluated as a draw.
>
>Main line: 39... Rxd4 40. Rxd4 Qxb2+ 41. Rd2 Qb3 42. Rd8+ {here Hossa played 42.
>Qh4?} Kf7 43. Qf2

The Baron 0.99.6b3 avoids Rxd4 within a second (PIII-500) and chooses Rc8
instead:

 ply       time     nodes  score  pv

  4(10)>      0     14006     46  d8d4
  4(10)&      0     14446     61  d8d4 d2d4 b3b2 d4d2 b2e5
  4(10).      0     21324     61  d8d4 d2d4 b3b2 d4d2 b2e5
  5(10)>      0     24814     27  d8a8
  5(10)&      0     30018     38  d8a8 e1d1 b3d1 d2d1 a8a2 h2h4
  5(14)>      0     69969     39  d8c8
  5(14)&      1     94337     58  d8c8 e1c1 c8c6 c1d1 b3a2
  5(14).      1    105889     58  d8c8 e1c1 c8c6 c1d1 b3a2
  6(14)&      2    178258     75  d8c8 e1c1 c4c3 d2c2 b3c4 c1e3 c4a2
  6(14).      2    221112     75  d8c8 e1c1 c4c3 d2c2 b3c4 c1e3 c4a2
  7(17)&      6    498981     58  d8c8 e1c1 c8c6 e4e5 c4c3 b2c3 b4c3 d2c2 f6e5
  7(18).     13   1083870     58  d8c8 e1c1 c8c6 e4e5 c4c3 b2c3 b4c3 d2c2 f6e5
  8(19)&     22   1855343     87  d8c8 e1c1 c4c3 b2c3 b3c4 d2c2 b4b3 c2d2 c8d8
  8(19).     25   2069670     87  d8c8 e1c1 c4c3 b2c3 b3c4 d2c2 b4b3 c2d2 c8d8
  9(21)&     53   4290219     64  d8c8 e1c1 c4c3 d2c2 b3c4 c1e3 c8d8 b2c3 b4b3
c2b2
  9(21).     81   6442600     64  d8c8 e1c1 c4c3 d2c2 b3c4 c1e3 c8d8 b2c3 b4b3
c2b2
 10(22)&    190  14419304     64  d8c8 e1c1 b3a4 d2c2 a4a5 d4e3 c4c3 g2g1 e6b3
c2d2 c3c2

>
>[D]3R4/5kpp/4bp2/8/1pp1P1P1/1q3P2/5QKP/8 b - - 0 43
>
>Whites queen becomes active and black has to give perpetual checks e.g. after
>43... g5 44. Qa7+ Kg6 45. Qe7.

The Baron is not happy with the black position:

 ply       time     nodes  score  pv

  4(10)&      0     18658     65  c4c3 f2c5 b3b2 g2g3 h7h6 c5h5 f7e7
  4(10).      0     19127     65  c4c3 f2c5 b3b2 g2g3 h7h6 c5h5 f7e7
  5(13)&      0     43842     57  c4c3 f2c5 b3b2 g2f1 b2b1 f1f2 b1c2 f2g3 c2b1
  5(13).      0     63406     57  c4c3 f2c5 b3b2 g2f1 b2b1 f1f2 b1c2 f2g3 c2b1
  6(16)&      3    257258     60  c4c3 f2c5 g7g5 f3f4 b3b2 g2f3 g5f4 c5c7 f7g6
  6(16).      3    276318     60  c4c3 f2c5 g7g5 f3f4 b3b2 g2f3 g5f4 c5c7 f7g6
  7(18)-     14   1069998     25  c4c3 f2c5 g7g5 c5f8 f7g6 e4e5 f6e5 f8e8 g6f6
e8f8 e6f7 d8d6 b3e6 d6e6 f6e6
  7(18)>     20   1553228    -64  b3a3
  7(18)&     22   1682669    -44  b3a3 f2c5 g7g5 c5f8 f7g6 f8e7 a3a2 g2f1 a2a5
d8d6 a5a1 f1e2
  7(18)>     22   1719584    -43  h7h6
  7(18)&     22   1750871    -34  h7h6 d8b8 c4c3 f2c5 f7g6 b8b4 b3a2 g2g3 e6g4
  7(18)>     23   1779559      0  f7g6
  7(18)&     24   1864144     25  f7g6 f2c5 h7h6 d8e8 b3c2 g2g3 e6d7 e8d8 b4b3
  7(18).     24   1864162     25  f7g6 f2c5 h7h6 d8e8 b3c2 g2g3 e6d7 e8d8 b4b3
  8(20)>     53   4084708     -1  h7h6
  8(20)&     54   4173228      0  h7h6 d8b8 f7g6 f2c5 b3c2 g2g3 b4b3 b8h8 g6f7
  8(20).     70   5311867      0  h7h6 d8b8 f7g6 f2c5 b3c2 g2g3 b4b3 b8h8 g6f7
  9(21)-    257  18322681    -35  h7h6 d8b8 g7g5 f2c5 c4c3 b8b4 f7g6
  9(21)&    283  20356577    -44  h7h6 d8b8 c4c3 f2c5 b3b2 g2g3 c3c2 c5h5 g7g6
b8b7 e6d7 h5d5 f7f8 d5d6 f8g8
  9(21)>    294  21169991    -43  g7g5
  9(21)&    312  22471140    -43  g7g5 h2h4 g5h4 f2h4 f7g7 g2f2 b3b2 f2e3 b2c1
e3e2 b4b3 d8d6
  9(21).    341  24527120    -43  g7g5 h2h4 g5h4 f2h4 f7g7 g2f2 b3b2 f2e3 b2c1
e3e2 b4b3 d8d6
 10(22)&    694  48790381    -51  g7g5 f2a7 f7g6 a7e7 b3a2 g2g1 a2b1 g1f2 b1a2
f2e1 a2a5
 10(23).   1172  83097536    -51  g7g5 f2a7 f7g6 a7e7 b3a2 g2g1 a2b1 g1f2 b1a2
f2e1 a2a5
 11(25)&   3162 222004522    -44  g7g5 h2h4 g5h4 d8b8 f7g7 b8b7 e6f7 f2h4 c4c3
e4e5 c3c2 e5f6 g7f8

Richard



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