Computer Chess Club Archives


Search

Terms

Messages

Subject: Re: Rook Sacrifice and a deadly fail low

Author: Dann Corbit

Date: 16:12:35 03/06/04

Go up one level in this thread


On March 06, 2004 at 17:06:23, GeoffW wrote:

>Hi
>
>Here is a position I found interesting, white has just played Rf6, black to move
>
>[D]r3qnk1/rb2bppp/4pR2/pp1pP1PP/2pP3N/P1P1P1Q1/1PB5/4B1RK b - - 0 1
>
>My programs analysis for this position is horrid
>
>Ply  Eval   Time      Nodes   Principle Variation
> 1    433      0         17   g7f6 e5f6
> 2    433      0        290   g7f6 e5f6
> 3-   393      1       4782   g7f6
> 3    204      1       8053   e7a3 b2a3 g7f6 e5f6
> 4    204      3      18575   e7a3 b2a3 g7f6 e5f6
> 5    204      6      44876   e7f6 g5f6 g7g6 h4f3 f8d7 h5g6 h7g6
> 6    192     10      97670   e7f6 e5f6 g7g6 h5g6 h7g6 h4f3
> 7    194     21     193103   e7f6 e5f6 g7g6 h4f3 a8d8 h5g6 h7g6
> 8    187     60     564304   e7f6 e5f6 g7g6 h4f3 g6h5 g3h4 f8d7 h4h5
> 9    188    132    1263805   e7f6 e5f6 g7g6 h4f3 f8d7 e1d2 a8b8 g3h2 e8d8
>10    176    396    3783030   e7f6 e5f6 g7g6 h4f3 f8d7 g3h2 a8d8 e1g3 d7b6 f3e5
>11    176    942    8062241   e7f6 e5f6 g7g6 h4f3 e8c6 g3h2 f8d7 e1g3 a8d8 f3e5
>d7e5 g3e5
>12-   136   3984   35236639   e7f6
>12    102  144954  868931003   b5b4 a3b4 a5b4 f6f4 a7a2 g3g2 b4b3 c2b1 a2a1 e1d2
>f8d7 e3e4
>
>It firstly thinks it has won a rook by taking it with Pxf6, then it realises
>this is bad, and avoids the Rook sacrifice by coming up with its own weird
>bishop sacrifice Bxa3. Two plies later then decides it had better take the rook
>after all with the obvious looking Bxf6. It takes 40 seconds to get to ply 12
>before it realises that this is also a hopeless losing move.
>Then it takes almost 25 minutes to resolve the fail low with a branching factor
>of 24 !!
>I am not sure why it struggles to resolve this specific fail low so badly, this
>is probably the trickiest fail low I have seen so far, at least for my program.
>It was taking so long I was convinced it was locking up in an infinite search
>bug. I guess it probably isnt a bug as it finally does come up with a reasonable
>move, all be it far too late.
>
>What do other programs make of this, daresay Crafty et al. will have it all
>worked out and resolved in about 5 seconds flat ;-(
>
>P.S it finally managed ply 13 as I was typing this up
>
>13    102  327723 2072998497   b5b4 a3b4 a5b4 f6f2 b4b3 c2b1 f8d7 e1d2 a7a1 h5h6
>g7g6 h4f3 a8a7
>
>54 minutes to decide white is a pawn up after avoiding the sac.
>
>         Regards Geoff


Some more strong engines weigh in.  I think that ChessMaster's idea is probably
strongest {JM's post}, but I would play b4 personally (because that idea is
obvious to me).
--------------------------------------------------------------------------------

Analysis from E:\am.epd
3/6/2004 3:10:18 PM Level: 180 Seconds
Analyzing engine: Kke-253

1)
    Searching move:
    Best move (Kke-253): b5-b4
    Not found in: 03:00
    6   00:00  0.82   [+=] Bxf6 exf6 Nd7 fxg7 Kxg7 h6+ Kh8 Qc7
    6   00:01  0.87   b4 axb4 axb4 Rf2 bxc3 Bxc3 Nd7
    7   00:01  0.62   b4 axb4 axb4 cxb4 Bxf6 gxf6 g6 Qg5
    7   00:01  0.62   [+=] b4 axb4 axb4 cxb4 Bxf6 gxf6 g6 Qg5
    7   00:01  0.79   Bxf6 exf6 Nd7 fxg7 Kxg7 Qd6 Kh8 Qc7
    8   00:02  0.90   Bxf6 gxf6 g6 Qg5 Nd7 hxg6 fxg6 Nf3 Qf7 Qh6
    9   00:03 -0.03   Bxf6 gxf6 g6 Qg5 Nd7 hxg6 fxg6 Qh6 Qf7 Rg5 Rf8
    9   00:04 -0.03   [+=] Bxf6 gxf6 g6 Qg5 Nd7 hxg6 fxg6 Qh6 Qf7 Rg5 Rf8
    9   00:08  0.72   b4 axb4 axb4 cxb4 Bxf6 exf6 Nd7 Qd6 Ra6 Qc7 Qc8 Qxc8+ Bxc8
fxg7 Kxg7
   10   00:14  0.44   b4 axb4 axb4 cxb4 Bxf6 exf6 Nd7 fxg7 Kxg7 Rf1 Kh8 Qc7
   11   00:36  0.33   b4 axb4 axb4 Rf2 b3 Bb1 Nd7 Rgf1 Ra1 Bd2 Qd8 Rxf7 Bxg5
   12   01:21  0.30   b4 axb4 axb4 Rf2 b3 Bb1 Nd7 Rgf1 Ra1 Bd2 Qd8 Qf4 f6 gxf6
gxf6 exf6 Nxf6
   3/6/2004 3:13:22 PM, Time for this analysis: 00:03:00, Rated time: 03:00

0 of 1 matching moves
3/6/2004 3:13:23 PM, Total time: 12:03:04 AM
Rated time: 03:00 = 180 Seconds

--------------------------------------------------------------------------------

Analysis from E:\am.epd
3/6/2004 3:10:18 PM Level: Infinite
Analyzing engine: Ktulu

1)
    Searching move:
    Best move (Ktulu): b5-b4
    Not found in: 03:00
    7   00:00  1.32   Bxf6 gxf6 g6 hxg6 Nxg6 Rg2 Ra6 Kg1 Np:374525
   10   00:03  1.07   Bxf6 --
   10   00:10 -2.34   Bxf6 gxf6 g6 Qg5 Nd7 hxg6 fxg6 Qh6 Nxf6 exf6 Qf7 Qg5
Np:343244
   10   00:23 -0.05   Ra6 Rf2 b4 cxb4 axb4 g6 fxg6 Bxb4 Bxb4 axb4 Kh8 Nf3
Np:349268
   10   00:31  0.32   Bc6 Rf2 Qd8 Qf4 Be8 h6 g6 Rgg2 Nd7 Kg1 Np:352030
   10   00:53  0.87   b4 cxb4 axb4 Bxb4 Bxb4 axb4 Qb5 Rf2 Qxb4 g6 hxg6 Np:353377
   11   01:11  0.61   b4 cxb4 axb4 Bxb4 Bxb4 axb4 gxf6 gxf6+ Ng6 hxg6 hxg6 Nxg6
fxg6 Bxg6 Np:357121
   12   02:45  0.70   b4 cxb4 axb4 Bxb4 Bxb4 axb4 gxf6 gxf6+ Ng6 hxg6 hxg6 Nxg6
fxg6 Bxg6 Qf8 Np:94774
   3/6/2004 3:16:29 PM, Time for this analysis: 00:03:00, Rated time: 06:00

0 of 1 matching moves
3/6/2004 3:16:30 PM, Total time: 12:06:12 AM
Rated time: 06:00 = 360 Seconds

--------------------------------------------------------------------------------

Analysis from E:\am.epd
3/6/2004 3:10:18 PM Level: Infinite
Analyzing engine: List512

1)
    Searching move:
    Best move (List512): b5-b4
    Not found in: 03:00
    5   00:00  1.48   b5b4 g5g6 h7xg6 h5xg6 Be7xf6 e5xf6
    6   00:01  1.12   b5b4 g5g6 h7xg6 h5xg6 Be7xf6 e5xf6 g7xf6
    7   00:01  0.85   b5b4 c3xb4 a5xb4 a3xb4 Qe8b5 Rf6f2 Be7xb4 Be1xb4
    7   00:01  0.87   Be7xf6 g5xf6 g7g6 Qg3g5 Ra7a6 b2b3 c4xb3 Bc2xb3 Nf8d7
    8   00:01  0.85   Be7xf6 g5xf6 g7g6 Qg3g5 Ra8d8 h5xg6 h7xg6 b2b3 Bb7a6 b3xc4
    9   00:02  0.82   Be7xf6 g5xf6 g7g6 Qg3g5 Nf8d7 a3a4 b5xa4 Bc2xa4 Ra7a6
h5xg6 h7xg6 Nh4g2
   10   00:03  0.42   Be7xf6 g5xf6 g7g6 Qg3g5 Nf8d7 h5xg6 h7xg6 Qg5h6 Qe8f8
Rg1xg6+ Qf8g7
   10   00:03 -1.60   Be7xf6 g5xf6 g7g6 Qg3g5 Nf8d7 h5xg6 h7xg6 Qg5h6 Nd7xf6
e5xf6 Qe8f8 Qh6xf8+ Kg8xf8 Nh4g2
   10   00:04 -1.20   b5b4 c3xb4 a5xb4 a3xb4 Qe8b5 Rf6f2 Be7xb4 Be1xb4 Qb5xb4
Qg3f4 Qb4xb2
   10   00:06  0.62   b5b4 c3xb4 a5xb4 a3xb4 Be7xf6 g5xf6 g7g6 Qg3g5 Nf8d7 b4b5
Ra7a2 Be1c3
   11   00:14  0.53   b5b4 Rg1f1 b4b3 Bc2b1 Be7xf6 g5xf6 g7g6 h5xg6 Nf8xg6
Nh4xg6 h7xg6 Bb1xg6 f7xg6 f6f7+ Qe8xf7
   12   00:46  0.35   b5b4 h5h6 b4xa3 h6xg7 Nf8g6 Nh4xg6 f7xg6 b2xa3 Be7xa3
Rg1f1 Kg8xg7 Rf6f7+ Qe8xf7 Rf1xf7+ Kg7xf7
   3/6/2004 3:19:38 PM, Time for this analysis: 00:03:00, Rated time: 09:00

0 of 1 matching moves
3/6/2004 3:19:38 PM, Total time: 12:09:19 AM
Rated time: 09:00 = 540 Seconds

--------------------------------------------------------------------------------

Analysis from E:\am.epd
3/6/2004 3:10:18 PM Level: Infinite
Analyzing engine: Patzer 3.61

1)
    Searching move:
    Best move (Patzer 3.61): Be7xf6
    Not found in: 03:00
    2   00:00  1.92   Be7xf6 g5xf6
    3   00:00  1.82   Be7xf6 g5xf6 g7g6
    4-  00:00  1.45   Be7xf6 g5xf6
    4   00:00  1.25   Be7xf6 g5xf6 g7g6 Kh1h2
    5   00:00  1.56   Be7xf6 g5xf6 g7g6 Kh1h2 Bb7c6
    6   00:00  1.35   Be7xf6 g5xf6 g7g6 Kh1h2 Bb7c6 h5h6
    7   00:00  1.53   Be7xf6 g5xf6 g7g6 Kh1h2 Ra7a6 h5h6 Nf8d7
    8   00:01  1.48   Be7xf6 g5xf6 g7g6 Rg1g2 Nf8d7 Qg3g5 Ra7a6 Qg5h6
    9   00:02  1.29   Be7xf6 g5xf6 g7g6 Rg1g2 Ra8c8 Nh4f3 Ra7a8 Nf3g5 g6xh5
   10   00:05  1.31   Be7xf6 g5xf6 g7g6 Rg1g2 Bb7c6 Nh4f3
   11-  00:08  0.96   Be7xf6 g5xf6
   11-  00:35 -3.03   Be7xf6 g5xf6
   3/6/2004 3:22:47 PM, Time for this analysis: 00:03:00, Rated time: 12:00

0 of 1 matching moves
3/6/2004 3:22:47 PM, Total time: 12:12:28 AM
Rated time: 12:00 = 720 Seconds

--------------------------------------------------------------------------------

Analysis from E:\am.epd
3/6/2004 3:10:18 PM Level: Infinite
Analyzing engine: Quark-232-net

1)
    Searching move:
    Best move (Quark-232-net): b5-b4
    Not found in: 03:00
    4   00:00  0.66   e7a3 b2a3 g7f6 g5f6
    5   00:00  0.82   e7f6 g5f6 g7g6 e1d2 a7a6
    7   00:00  0.70   e7f6 e5f6 a7a6 e1d2 g7g6 g3c7 a8b8
    8   00:01  0.61   e7f6 e5f6 a7a6 f6g7 g8g7 g3c7 e8d7 c7f4
    9   00:04  0.58   e7f6 g5f6 g7g6 h4f3 a8b8 e1f2 e8d7 f3g5 a7a6
   10   00:06  0.47   e7f6 g5f6 g7g6 h4f3 a8b8 f3g5 b7a6 h5g6 f8g6 e1d2
   11   00:14  0.38   e7f6 g5f6 g7g6 h4f3 e8d7 e1d2 a7a6 f3g5 a8d8 e3e4 d5e4
   12   00:23  0.38   e7f6 g5f6 g7g6 h4f3 a7a6 e1d2 e8d7 f3g5
   13   00:32  0.08   e7f6?
   13   00:37 -0.92   e7f6??
   13   00:50 -4.55   e7f6 g5f6 f8g6 h5g6 f7g6 h4g6 b7c8 g3h4 h7h6 g6e7 a7e7
f6e7 a8a7 h4h6 e8e7
   13   00:53 -4.54   b5b4!
   13   00:55 -3.54   b5b4!!
   3/6/2004 3:25:55 PM, Time for this analysis: 00:03:00, Rated time: 15:00

0 of 1 matching moves
3/6/2004 3:25:56 PM, Total time: 12:15:37 AM
Rated time: 15:00 = 900 Seconds

--------------------------------------------------------------------------------

Analysis from E:\am.epd
3/6/2004 3:10:18 PM Level: Infinite
Analyzing engine: Quark-232-net

1)
    Searching move:
    Best move (Quark-232-net): b5-b4
    Not found in: 03:00
    4   00:00  0.66   e7a3 b2a3 g7f6 g5f6
    5   00:00  0.82   e7f6 g5f6 g7g6 e1d2 a7a6
    7   00:00  0.70   e7f6 e5f6 a7a6 e1d2 g7g6 g3c7 a8b8
    8   00:01  0.61   e7f6 e5f6 a7a6 f6g7 g8g7 g3c7 e8d7 c7f4
    9   00:04  0.58   e7f6 g5f6 g7g6 h4f3 a8b8 e1f2 e8d7 f3g5 a7a6
   10   00:06  0.47   e7f6 g5f6 g7g6 h4f3 a8b8 f3g5 b7a6 h5g6 f8g6 e1d2
   11   00:13  0.38   e7f6 g5f6 g7g6 h4f3 e8d7 e1d2 a7a6 f3g5 a8d8 e3e4 d5e4
   12   00:22  0.38   e7f6 g5f6 g7g6 h4f3 a7a6 e1d2 e8d7 f3g5
   13   00:32  0.08   e7f6?
   13   00:37 -0.92   e7f6??
   13   00:50 -4.55   e7f6 g5f6 f8g6 h5g6 f7g6 h4g6 b7c8 g3h4 h7h6 g6e7 a7e7
f6e7 a8a7 h4h6 e8e7
   13   00:53 -4.54   b5b4!
   13   00:55 -3.54   b5b4!!
   3/6/2004 3:29:02 PM, Time for this analysis: 00:03:00, Rated time: 18:00

0 of 1 matching moves
3/6/2004 3:29:03 PM, Total time: 12:18:44 AM
Rated time: 18:00 = 1080 Seconds

--------------------------------------------------------------------------------

Analysis from E:\am.epd
3/6/2004 3:10:18 PM Level: Infinite
Analyzing engine: Ruffian_202

1)
    Searching move:
    Best move (Ruffian_202): b5-b4
    Not found in: 03:00
    2   00:00  0.86   g7xf6 g5xf6+ Kg8h8
    2   00:00  1.29   Be7xf6 g5xf6 g7g6 h5xg6 h7xg6
    3   00:00  1.29   Be7xf6 g5xf6 g7g6 h5xg6 h7xg6
    4   00:00  1.00   Be7xf6 g5xf6 g7g6 Qg3g5 Qe8c6 h5xg6 h7xg6
    4   00:00  1.03   b5b4 h5h6 Be7xf6 g5xf6 g7g6 c3xb4
    5   00:00  0.98   b5b4 g5g6 Be7xf6 g6xh7+ Nf8xh7 e5xf6 g7g6 c3xb4 Nh7xf6
h5xg6
    6   00:00  1.24   b5b4 a3xb4 a5xb4 Rf6f2 b4b3 Bc2b1 Qe8c6
    7   00:00  0.84   b5b4 g5g6 h7xg6 Rf6f2 b4xa3 h5xg6 Be7xh4 Qg3xh4 a3xb2
g6xf7+
    7   00:01  0.89   Be7xf6 g5xf6 g7g6 h5xg6 h7xg6 Qg3g5 Qe8c6 Be1g3
    8   00:01  0.99   Be7xf6 g5xf6 g7g6 Qg3g5 Qe8c6 Nh4f3 Ra8e8 h5xg6 h7xg6
    9-  00:01  0.64   Be7xf6
    9   00:01 -1.36   Be7xf6 g5xf6 g7g6 Qg3g5 Nf8d7 h5xg6 h7xg6 Nh4xg6 f7xg6
Bc2xg6 Qe8d8
    9   00:03  0.14   b5b4 g5g6 f7xg6 h5xg6 h7h6 Rf6f7 b4xa3 b2xa3 a5a4 Rg1f1
Be7xa3
   10   00:06  0.14   b5b4 g5g6 f7xg6 h5xg6 h7h6 Rf6f7 b4xa3 b2xa3 a5a4 Rg1f1
Be7xa3
   11   00:16  0.23   b5b4 c3xb4 a5xb4 Be1xb4 Be7xb4 a3xb4 Qe8b5 Rf6f2 Qb5xb4
g5g6 f7xg6 h5xg6 h7h6
   12   00:29 -0.08   b5b4 c3xb4 a5xb4 Be1xb4 Be7xb4 a3xb4 Qe8b5 g5g6 f7xg6
h5xg6 h7h6 Rf6f7 Qb5xb4 Rg1b1
   13   01:39 -0.13   b5b4 c3xb4 a5xb4 g5g6 f7xg6 Nh4xg6 Be7xf6 e5xf6 Bb7c6
Ng6e7+ Ra7xe7 f6xe7 Qe8xh5+ Qg3h2 Qh5f3+ Rg1g2 Nf8g6 Bc2xg6 h7xg6 Be1xb4
   3/6/2004 3:32:10 PM, Time for this analysis: 00:03:00, Rated time: 21:00

0 of 1 matching moves
3/6/2004 3:32:11 PM, Total time: 12:21:52 AM
Rated time: 21:00 = 1260 Seconds

--------------------------------------------------------------------------------

Analysis from E:\am.epd
3/6/2004 3:10:18 PM Level: Infinite
Analyzing engine: Ruffian_210

1)
    Searching move:
    Best move (Ruffian_210): b5-b4
    Not found in: 03:00
    2   00:00  0.83   g7xf6 g5xf6+ Kg8h8
    2   00:00  1.26   Be7xf6 g5xf6 g7g6 h5xg6 h7xg6
    3   00:00  1.26   Be7xf6 g5xf6 g7g6 h5xg6 h7xg6
    4   00:00  1.07   Be7xf6 g5xf6 g7g6 Qg3g5 Nf8d7 h5xg6 h7xg6
    5   00:00  0.96   Be7xf6 g5xf6 g7g6 h5xg6 h7xg6 Qg3g5
    6   00:00  1.03   Be7xf6 g5xf6 g7g6 Qg3g5 Qe8c6 Be1g3 Nf8d7 h5xg6 h7xg6
    6   00:00  1.19   b5b4 Rf6f4 b4xa3 g5g6 h7xg6 h5xg6
    7   00:00  0.99   b5b4 Rf6f4 b4xa3 g5g6 f7xg6 h5xg6 h7h6 b2xa3 Be7xa3
    8   00:02  0.74   b5b4 g5g6 h7xg6 Rf6f2 g6g5 Nh4f3 b4xa3 b2xa3 Be7xa3 Nf3xg5
    8   00:02  0.99   Be7xf6 g5xf6 g7g6 Qg3g5 Qe8c6 Be1g3 Nf8d7 Kh1h2 Kg8f8
h5xg6 h7xg6
    9-  00:02  0.64   Be7xf6
    9   00:02 -1.28   Be7xf6 g5xf6 g7g6 Qg3g5 Nf8d7 h5xg6 h7xg6 Nh4xg6 f7xg6
Bc2xg6 Qe8f8
    9   00:04  0.03   b5b4 g5g6 f7xg6 h5xg6 h7h6 Rf6f7 b4xa3 b2xa3 a5a4 Rg1f1
Be7xa3
   10   00:06  0.03   b5b4 g5g6 f7xg6 h5xg6 h7h6 Rf6f7 b4xa3 b2xa3 a5a4 Rg1f1
Be7xa3
   11   00:17  0.14   b5b4 c3xb4 a5xb4 Be1xb4 Be7xb4 a3xb4 Qe8b5 g5g6 h7xg6
Rf6f2 Qb5xb4 h5xg6
   12-  00:31 -0.21   b5b4
   12   00:47 -0.35   b5b4 c3xb4 a5xb4 Be1xb4 Be7xb4 a3xb4 Ra7a2 Rf6f2 Qe8e7
g5g6 f7xg6 Bc2b1 Ra2a1 h5xg6
   13   02:20 -0.62   b5b4 c3xb4 a5xb4 g5g6 f7xg6 Nh4xg6 Be7xf6 e5xf6 Bb7c6
Ng6e7+ Ra7xe7 f6xe7 Qe8xh5+ Qg3h2 Qh5f3+ Rg1g2 Nf8g6 Bc2xg6 h7xg6 Be1xb4
   3/6/2004 3:35:18 PM, Time for this analysis: 00:03:00, Rated time: 24:00

0 of 1 matching moves
3/6/2004 3:35:19 PM, Total time: 12:25:00 AM
Rated time: 24:00 = 1440 Seconds

--------------------------------------------------------------------------------

Analysis from E:\am.epd
3/6/2004 3:10:18 PM Level: Infinite
Analyzing engine: Smarthink-017a

1)
    Searching move:
    Best move (Smarthink-017a): b5-b4
    Not found in: 03:00
    5   00:00  0.85   e7f6 g5f6 g7g6 c2d1 f8d7 h5g6 h7g6
    6   00:00  0.84   e7f6 g5f6 g7g6 c2d1 f8d7 h5g6 h7g6 g3g4
    6   00:00  0.20   e7f6 g5f6 g7g6 c2d1 f8d7 g3h2 g8f8 h5g6 h7g6 g1g5
    6   00:01  0.21   b5b4 a3b4 a5b4 f6f4 b4b3 c2d1
    6   00:01  0.23   b5b4 a3b4 a5b4 c3b4 e7f6 g5f6 g7g6 g3g5
    7   00:01  0.22   b5b4 a3b4 a5b4 c3b4 e7f6 g5f6 g7g6 g3g5
    7   00:02 -0.01   b5b4 a3b4 a5b4 c3b4 e7f6 g5f6 g7g6 h5g6 h7g6 g3h2 a7a2
    7   00:02  0.00   e7f6 g5f6 g7g6 c2d1 f8d7 g3h2
    7   00:02  0.16   e7f6 g5f6 g7g6 c2d1 f8d7 g3h2 a7a6 h5g6 h7g6 g1g5 g8f8
a3a4 a6b6 a4b5
    8   00:03  0.15   e7f6 g5f6 g7g6 c2d1 f8d7 g3h2 a7a6 h5g6 h7g6 h4f3
    8   00:04  0.01   e7f6 g5f6 g7g6 g3g5
    9   00:06  0.00   e7f6 g5f6 g7g6 g3g5
    9   00:08 -0.82   e7f6 g5f6 g7g6 g3g5
    9   00:10 -0.81   b5b4 a3b4 a5b4 c3b4 e7f6 g5f6 g7g6 g3g5 a7a2 g5h6 f8d7
h5g6 f7g6 h6g7
    9   00:19 -0.49   b5b4 c3b4 a5b4 a3b4 e8b5 f6f2 e7b4 e1b4 b5b4 h5h6 g7g6
g3f4 b4e7
   10   00:27 -0.50   b5b4 c3b4 a5b4 a3b4 e8b5 f6f2 e7b4 e1b4 b5b4 h5h6 g7g6
g3f4 b4e7
   10   00:46 -0.63   b5b4 c3b4 a5b4 e1b4 e7b4 a3b4 e8b5 f6f2 b5b4 h5h6 g7g6
c2d1 f8d7 g1f1
   11   01:16 -0.64   b5b4 c3b4 a5b4 e1b4 e7b4 a3b4 e8b5 g5g6 f7g6 h5g6 f8g6
h4g6 g7f6 g6e7
   11   01:59 -0.64   b5b4 c3b4 a5b4 e1b4 e7b4 a3b4 e8b5 g5g6 f7g6 f6f2 a7a2
h5g6 h7h6 c2d1 b5b4 g3g2
   12   02:56 -0.65   b5b4 c3b4 a5b4 e1b4 e7b4 a3b4 e8b5 c2h7 f8h7 g5g6 h7f6
g6f7 g8f7 e5f6 g7f6 g3c7 f7f8 h4g6 f8g8 h5h6 a8f8
   3/6/2004 3:38:53 PM, Time for this analysis: 00:03:00, Rated time: 30:00

0 of 1 matching moves
3/6/2004 3:38:54 PM, Total time: 12:28:35 AM
Rated time: 30:00 = 1800 Seconds

--------------------------------------------------------------------------------

Analysis from E:\am.epd
3/6/2004 3:10:18 PM Level: Infinite
Analyzing engine: Yace

1)
    Searching move:
    Best move (Yace): b5-b4
    Not found in: 03:00
    2   00:00  1.08   Be7xf6 g5xf6
    3   00:00  0.93   Be7xf6 g5xf6 g7g6 Qg3g5
    4   00:00  1.05   Be7xf6 g5xf6 g7g6 Qg3g5 Qe8c6
    5   00:00  0.96   Be7xf6 g5xf6 g7g6 h5xg6 h7xg6 Qg3g5
    6   00:00  1.05   Be7xf6 g5xf6 g7g6 h5xg6 h7xg6 Qg3g5 Qe8c6 Nh4f3
    7   00:00  0.90   Be7xf6 g5xf6 g7g6 Kh1g2 Nf8d7 h5xg6 h7xg6 Kg2f3
    8   00:02  0.74   Be7xf6 g5xf6 g7g6 Kh1g2 Bb7c6 h5xg6 h7xg6 Kg2f3 b5b4 a3xb4
a5xb4 c3xb4
    9   00:05  0.64   Be7xf6 g5xf6 g7g6 Kh1g2 Qe8d8 h5xg6 h7xg6 Kg2f3 a5a4 Kf3e2
Qd8a5
   10-  00:08  0.24   Be7xf6 Bc2xh7+ Nf8xh7 g5xf6 Qe8f8 Qg3h2 g7g6 h5xg6 f7xg6
Nh4xg6 Qf8f7 Ng6f4+ Qf7g7 f6xg7 Bb7c6
   10   00:10 -0.46   Be7xf6 Bc2xh7+ Nf8xh7 g5xf6 Qe8f8 Qg3h2 Nh7xf6 e5xf6 g7g6
h5xg6 Qf8xa3 b2xa3 Kg8h8
   10+  00:45 -0.45   a5a4 Rf6f4 Be7d8 Rg1f1 Bb7c6 Rf4xf7 Ra7xf7 g5g6 h7xg6
h5xg6
   10   00:50 -0.36   a5a4 Rf6f4 Be7d8 Rg1f1 Bb7c8 g5g6 h7xg6 h5xg6 f7f5
e5xf6/ep g7xf6
   10+  01:06 -0.35   b5b4 Rf6f4 b4xa3 b2xa3
   10   01:48  0.40   b5b4 g5g6 f7xg6 h5xg6 h7h6 Rf6f7 b4xa3 b2xa3 Kg8h8 Rg1f1
a5a4 Qg3f4
   3/6/2004 3:45:09 PM, Time for this analysis: 00:03:00, Rated time: 36:00

0 of 1 matching moves
3/6/2004 3:45:10 PM, Total time: 12:34:51 AM
Rated time: 36:00 = 2160 Seconds

Analysis from E:\am.epd
3/6/2004 3:49:38 PM Level: 180 Seconds
Analyzing engine: Shredder 7.04

1)
    Searching move:
    Best move (Shredder 7.04): b5-b4
    Not found in: 03:00
    2-  00:00  2.42   g7xf6 g5xf6+ Nf8g6 f6xe7 Qe8xe7
    2-  00:00  0.77   g7xf6 g5xf6+ Nf8g6 f6xe7 Qe8xe7
    2   00:00 -0.49   g7xf6 g5xf6+ Kg8h8 f6xe7 Qe8xe7
    2   00:00  1.84   Be7xf6 g5xf6
    3-  00:00  1.43   Be7xf6 g5xf6 g7g6
    3   00:00  0.88   Be7xf6 g5xf6 g7g6 h5xg6 h7xg6
    4   00:00  0.88   Be7xf6 g5xf6 g7g6 h5xg6 h7xg6
    5   00:00  0.88   Be7xf6 g5xf6 g7g6 h5xg6 h7xg6
    6   00:00  0.78   Be7xf6 g5xf6 g7g6 Qg3g5 Nf8d7 h5xg6 h7xg6
    7-  00:00  0.53   Be7xf6 g5xf6 g7g6 Qg3g5 Nf8d7 h5xg6 Nd7xe5 d4xe5 h7xg6
    7   00:00  0.18   Be7xf6 g5xf6 g7g6 Qg3g5 Nf8d7 h5xg6 f7xg6 Qg5h6 Qe8f8
    7+  00:00  0.19   b5b4 Rf6f2 b4xa3 b2xa3 Be7xa3 Rf2f1
    7   00:00  0.19   b5b4 Rf6f2 b4xa3 g5g6 a3xb2 g6xf7+ Kg8h8 f7xe8Q
    8-  00:00 -0.06   b5b4 Rf6f2 b4xa3 g5g6 a3xb2 g6xf7+ Kg8h8 f7xe8Q
    8   00:01 -0.13   b5b4 Rf6f2 b4xa3 g5g6 f7xg6 h5xg6 h7h6 b2xa3 Be7xa3
    8+  00:01 -0.12   Be7xf6 g5xf6 g7g6 Qg3g5 Nf8d7 h5xg6 f7xg6 Qg5h6 Qe8f8
Qh6g7+ Qf8xg7
    8   00:01 -0.12   Be7xf6 g5xf6 g7g6 Qg3f4 Nf8d7 h5xg6 f7xg6 Nh4xg6 Nd7f8
Ng6xf8+ Qe8g6 Bc2xg6
    9-  00:02 -0.37   Be7xf6 g5xf6 g7g6 Qg3f4 Nf8d7 h5xg6 f7xg6 Nh4xg6 Nd7f8
Ng6xf8+ Qe8g6 Bc2xg6
    9-  00:02 -0.87   Be7xf6 g5xf6 g7g6 Qg3f4 Nf8d7 h5xg6 f7xg6 Nh4xg6 Nd7f8
Ng6xf8+ Qe8g6 Bc2xg6
    9   00:02 -2.77   Be7xf6 g5xf6 Nf8g6 h5xg6 f7xg6 f6xg7 Qe8f7 Qg3g5 Qf7xg7
Rg1f1
    9+  00:03 -2.76   b5b4 Rf6f2
    9+  00:03 -2.41   b5b4 Rf6f2 b4xa3 g5g6 f7xg6 h5xg6 h7h6 Qg3g5 h6xg5
    9   00:04 -0.13   b5b4 Rf6f2 b4xa3 g5g6 f7xg6 h5xg6 h7h6 b2xa3 Be7xa3
   10   00:07 -0.19   b5b4 Rf6f4 b4xa3 b2xa3 Be7xa3 g5g6 f7xg6 h5xg6 h7h6 Qg3g5
h6xg5
   11   00:12 -0.44   b5b4 Rf6f4 b4xa3 b2xa3 Be7xa3 g5g6 f7xg6 h5xg6 h7xg6
Nh4xg6 Nf8xg6 Bc2xg6 Qe8d7
   12   00:25 -0.46   b5b4 Rf6f4 b4xa3 b2xa3 Be7xa3 g5g6 f7xg6 h5xg6 h7h6 Rg1f1
Ba3e7 Rf4f7 a5a4 Kh1g1
   13   01:07 -0.49   b5b4 Rf6f4 b4xa3 b2xa3 Be7xa3 g5g6 f7xg6 h5xg6 h7h6 Rg1f1
Ba3e7 Qg3g2 a5a4 Bc2b1 Qe8b5 Qg2c2
   3/6/2004 3:52:41 PM, Time for this analysis: 00:03:00, Rated time: 03:00

0 of 1 matching moves
3/6/2004 3:52:41 PM, Total time: 12:03:03 AM
Rated time: 03:00 = 180 Seconds





This page took 0 seconds to execute

Last modified: Thu, 15 Apr 21 08:11:13 -0700

Current Computer Chess Club Forums at Talkchess. This site by Sean Mintz.