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Subject: Re: Wrong endgame evaluation by Junior 7

Author: Hansjoerg

Date: 15:02:37 01/02/02

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The position is from a game (engine match) against Shredder 6.

Shredder 6 (2600) - Junior 7 (2600) [E03]
Junior7-Shredder6, Blitz:15'+10" HANSJOERG (2), 02.01.2002

W=12.7 ply; 370kN/s; 1.006.262 TBAs
B=19.5 ply; 1.276kN/s; 23.016 TBAs
 1.d4 Sf6 2.c4 e6 3.g3 d5 4.Lg2 dxc4 5.Da4+ Sbd7 6.Sf3 a6 7.Dxc4 c5 8.0-0 b5
9.Dd3 Lb7 10.a4 Le4 Beide letzter Buchzug  -0.25/14  24  11.Dd1  -0.19/12  53
cxd4  -0.19/16  58  12.Lf4 (Sxd4)  -0.25/11  41  12...e5 (Tc8)  -0.24/14  23
13.Lxe5  -0.22/13  47  Sxe5  -0.27/14  27  14.Sxe5  -0.21/14  48  Lxg2  -0.26/14
 22  15.Kxg2  -0.07/14  1:15  Lc5  -0.20/14  38  16.Sf3 (b4)  0.07/12  41
16...0-0  -0.12/15  36  17.axb5 (Dd3)  0.11/12  14  17...axb5  -0.14/16  27
18.Txa8  0.20/10  4  Dxa8  -0.05/17  43  19.Dd3  0.09/12  14  Se4  -0.05/17
1:53  20.Tc1  0.62/12  28  La7 (b4)  0.10/16  56  21.Dxb5 (Tc7)  0.89/12  17
21...d3  -0.01/14  22  22.exd3 (e3)  0.98/13  51  22...Sxf2  -0.27/15  23
23.Tc7  1.32/12  33  Le3  -0.19/14  16  24.Sa3 (d4)  1.53/11  19  24...Sg4 (h6)
0.08/14  18  25.Dc6 (Db7)  1.97/12  34  25...Db8 (Dd8)  0.38/16  47  26.Sc4
1.81/12  1:20  Lc1  0.51/16  1:53  27.Te7 (Db7)  1.82/11  36  27...Db3  0.32/14
19  28.De4  1.71/11  46  Sf6  0.44/14  26  29.De2  1.73/11  10  h5 (Da4)
0.39/14  19  30.Sd4 (h3)  1.97/12  33  30...Da4 (Db8)  0.48/14  20  31.Sf5
2.08/11  36  g6 (Db3)  0.47/13  21  32.Sfd6  1.90/11  13  h4 (Sd5)  0.45/13  15
33.Df3  2.02/11  30  Lg5  0.31/13  20  34.Te1 (gxh4)  1.84/10  48  34...Dc2+
0.36/12  11  35.Te2 (Kg1)  1.83/11  29  35...Da4  0.32/13  9  36.gxh4  1.61/11
1:31  Lxh4  0.24/13  16  37.Te5 (b4)  1.77/11  1:10  37...Dc2+ (Sh7)  0.25/13
16  38.Kh3 (De2)  1.97/11  9  38...Df2  0.44/13  10  39.Dxf2  1.94/11  8  Lxf2
0.37/14  3  40.Kg2  1.84/12  22  Ld4  0.33/16  12  41.Tb5  1.79/12  16  Se8
0.37/16  10  42.Sc8 (Td5)  1.76/13  21  42...Sc7 (f5)  0.17/17  16  43.Se7+
1.66/14  24  Kg7  0.22/17  17  44.Tb7 (Ta5)  1.50/14  25  44...Se6  0.00/17  32
45.b4  1.74/13  24  Ta8 (Th8)  0.00/15  8  46.Kg3 (Sc6)  1.57/11  26  46...Ta2
(Ta1)  0.04/15  11  47.Sc6 (Sd5)  1.84/11  17  47...Lg1  0.00/14  13  48.h4
1.57/12  24  Kf6  0.26/13  11  49.Td7 (b5)  1.56/11  20  49...Sg7  0.00/13  8
50.Sd8 (Td6+)  1.08/12  35  50...Sh5+ (Sf5+)  0.38/14  8  51.Kh3 (Kg4)  1.74/12
11  51...Th2+  0.57/17  14  52.Kg4  1.74/7  0  Tg2+  0.50/17  11  53.Kf3
1.71/13  12  Tf2+  0.40/17  34  54.Ke3 (Ke4)  1.47/13  24  54...Kg7  0.24/14  11
 55.d4  1.47/13  25  Kg8  0.23/14  51  56.Se5  1.36/11  11  Tf4+  0.40/14  24
57.Kd3  1.57/13  6  Sf6  0.31/15  11  58.Txf7  1.90/12  5  Txd4+  0.31/14  4
59.Ke2  1.56/12  24  Sd5  0.44/14  12  60.Kf3  1.64/12  11  Td1 (Lh2)  0.45/13
4  61.Td7  1.94/11  8  Tf1+  0.28/13  5  62.Kg3  1.69/12  7  Lf2+  0.20/14  8
63.Kg2  1.44/12  6  Se3+  0.28/15  8  64.Kf3  1.44/10  1  Sf5  0.26/15  14
65.Ke2  1.31/11  12  Sg3+ (Te1+)  0.25/16  14  66.Kd3  1.48/10  1  Td1+  0.24/17
 37  67.Kc4  1.00/15  24  Txd7  0.25/17  13  68.Sxd7  0.85/15  9  Se4 (Sf5)
0.22/17  8  69.Se5 (Sc5)  1.03/14  19  69...Lxh4  0.00/17  7  70.Kd4 (Sdf7)
0.08/15  18  70...Le7 (Le1)  0.00/17  5  71.Sec6 (Kxe4)  0.08/16  5  71...Lxb4
0.00/21  5  72.Kxe4 (Sxb4)  0.08/15  5  72...g5  0.00/27  4  73.Kf3 (Sd4)
0.09/15  6  73...g4+  0.00/28  4  74.Kxg4  0.10/15  6  Le1 (Kg7)  0.00/62  0
75.Kf5  0.12/17  5  La5 (Kf8)  0.00/63  0  76.Se6  0.12/19  8  Le1 (Kf7)
0.00/63  0  77.Kg6  0.38/18  6  La5 (Lb4)  0.00/63  0  78.Se7+  #3/5  0  Kh8
0.00/3  0  79.Sg5  #2/3  0  Le1 (Lc3)  0.00/63  0  80.Sf7# 1-0


Hansjoerg


>On January 02, 2002 at 14:24:04, Hansjoerg wrote:
>
>>In the following position Junior 7 plays as black Ba5 (eval 0.00).
>>and is mated in 3 moves. The evaluation stays at 0.00 until the mate.
>>
>>6k1/8/2N1N1K1/8/8/8/8/4b3 b - - 0 77
>
>Junior7 knows that 2 knights cannot mate.
>
>If you want it to solve the position you can change the parameters and tell
>it not to use knowledge of insufficient material but the program is going to
>play weaker because in more than 99.99% of the practical cases the knowledge of
>Junior is correct.
>
>Is this position from a practical game?
>
>Uri



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