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Subject: Re: 5 difficult positions?

Author: Eelco de Groot

Date: 04:23:53 02/10/02

Go up one level in this thread


On February 10, 2002 at 05:34:23, Eelco de Groot wrote:

>On February 09, 2002 at 23:09:07, Albert Silver wrote:
>
>>On February 09, 2002 at 19:55:58, Andrew Williams wrote:
>>
>>>Hi Ed,
>>>
>>>PostModernist says:
>>>
>>>EPD TEST SET: rebelhard.epd - 360 seconds per position
>>>
>>>ID rebelhard.epd.0001 - CORRECT in     6.05 seconds. nodes: 354557
>>
>>Could you post the analysis and a few lines beyond?
>>
>>                                   Albert
>>
>>>ID rebelhard.epd.0002 - WRONG. nodes: 35362560 (Nxh6)
>>>ID rebelhard.epd.0003 - WRONG. nodes: 53597184 (Kd2)
>>>ID rebelhard.epd.0004 - WRONG. nodes: 76704256 (Rf3)
>>>ID rebelhard.epd.0005 - CORRECT in   273.02 seconds. nodes: 45357242
>>>
>>>RESULT: 2 Correct (5 positions @ 360 seconds).
>>>
>>>NODES per second 163993
>>>
>>>
>>>This is on an Athlon 1200.
>>>
>>>Andrew
>
>
>Me too! I would like to know what Troitzky's intended line was in his study. I
>couldn't find the study on the Net, so far.
>
>Trying Q5T it won't play Rf7:
>
>[d]k2N2K1/8/8/8/5R2/3n4/3p4/8 w - - bm Rf7 (Troitzky);
>
>Game begin
>
>00:00  05.01  -3.22  1.Rf1
>00:00  07.01  -3.71  1.Rf1
>00:01  08.00  -4.01  1.Ra4+ Kb8 2.Ra1 Nc1 3.Rb1+ Kc8 4.Nf7 d1=Q
>00:01  08.01  -3.79  1.Rf1 Ne1 2.Nf7 d1=Q 3.Rg1 dxe2 4.Rg7
>00:02  09.00  -3.97  1.Rf1 Ne1 2.Ne6 d1=Q 3.Rf8+ Kb7 4.Rf7+
>00:05  10.00  -4.06  1.Rf1 Ne1 2.Ne6 d1=Q 3.Rf8+ Kb7 4.Rf7+
>00:16  11.00  -4.40  1.Rf1 Ne1 2.Nc6 d1=Q 3.Rf8+ Kb7 4.Nd8
>01:35  12.00  -4.39  1.Rf1 Ne1 2.Nc6 d1=Q 3.Rf8+ Kb7 4.Nd8+
>04:05  13.00  -4.59  1.Rf1 Ne1 2.Nc6 d1=Q 3.Rf8+ Kb7 4.Nd8+
>22:10  14.00  -4.59  1.Rf1 Ne1 2.Nf7 d1=Q 3.Rg1 Ka7 4.Rg7
>13:11  15.00  -4.76  1.Rf1 Ne1 2.Nf7 d1=Q 3.Rg1 dxb3 4.Rg7
>
>And after 1.Rf7:
>
>Rebel Engine for ECTool. (c) Ed Schröder
>
>Engine version   :  REBEL CENTURY 2
>Rebel personality :  "Personality Q5T"
>Opening book file :  RebelC.mvs
>Hash table size  :  4 MB
>Analysis mode   :  Analyzing next move
>Refresh interval : 500 ms
>
>Last Move : 1.Rf7 (Black to play)
>
>00:00  05.00  4.54  1..d1=Q 2.Re7 Nc5 3.Ne6 dxg4+ 4.Ng7
>00:01  08.00  5.09  1..d1=Q 2.Re7 Nc5 3.Ne6 dxd5 4.Re8+ Kb7
>00:02  09.00  5.47  1..d1=Q 2.Re7 dxg4+ 3.Rg7 gxc8 4.Kh7 Nf4
>00:04  10.00  5.90  1..d1=Q 2.Ne6 dxg4+ 3.Ng7 Ne5 4.Rf5 g3
>00:06  11.00  5.91  1..d1=Q 2.Ne6 Ne5 3.Re7 dxg4+ 4.Ng7 gxg5
>01:16  12.00  6.55  1..d1=Q 2.Rf8 dxg4+ 3.Kh7 gxh4+ 4.Kg8 hxg5+
>03:43  13.00  6.15  1..d1=Q 2.Rf8 dxg1=Q+ 3.Kh7 gxh2+ 4.Kg7 hxe5+
>06:14  14.00  6.13  1..d1=Q 2.Rf8 dxg4+ 3.Kh7 gxh4+ 4.Kg7 hxg5+
>25:49  15.00  6.59  1..d1=Q 2.Rf8 dxg4+ 3.Kh7 gxh4+ 4.Kg8 hxg5+
>07:27  16.00  6.59  1..d1=Q 2.Rf8 dxg4+ 3.Kh7 gxh4+ 4.Kg8 hxg5+
>
>Iteration 17 looks to be a fail-low but that could take quite a while. Celeron
>500 MHz, clocking 8 hours so far on a reply to 1.Rf7.

Of this last analysis, this is the logfile below. It shows a FEN with White to
move which I think should be Black? Maybe something went wrong entering 1.Rf7.

Thinking....

  +---+---+---+---+---+---+---+---+   -
8 | *K|   |   | N |   |   | K |   |
  +---+---+---+---+---+---+---+---+  00:00:00      00:00:00
7 |   |   |   |   |   | R |   |   |
  +---+---+---+---+---+---+---+---+
6 |   |   |   |   |   |   |   |   |  Time
  +---+---+---+---+---+---+---+---+  Hash           4 Mb
5 |   |   |   |   |   |   |   |   |  Engine        Rebel Century 2.0
  +---+---+---+---+---+---+---+---+  Personality   Y5b.eng
4 |   |   |   |   |   |   |   |   |
  +---+---+---+---+---+---+---+---+
3 |   |   |   | *N|   |   |   |   |
  +---+---+---+---+---+---+---+---+
2 |   |   |   | *p|   |   |   |   |
  +---+---+---+---+---+---+---+---+
1 |   |   |   |   |   |   |   |   |
  +---+---+---+---+---+---+---+---+  1.. Rf4-f7
    a   b   c   d   e   f   g   h

k2N2K1/5R2/8/8/8/3n4/3p4/8 w - -

[Event ""]
[Site ""]
[Date "-9928.-54.-20"]
[Round ""]
[White ""]
[Black ""]
[Result "*"]
[BlackElo ""]
[WhiteElo ""]
[FEN "k2N2K1/5R2/8/8/8/3n4/3p4/8 w - - 0 1"]

1.Rf7 *

00:00  01.00  3.99   1..d1=Q
00:00  02.00  3.60   1..d1=Q 2.Rd7
00:00  03.00  4.21   1..d1=Q 2.Rh7 dxf3
00:00  04.00  4.17   1..d1=Q 2.Rg7 dxh5 3.Kf8
00:00  05.00  4.54   1..d1=Q 2.Re7 Nc5 3.Ne6 dxg4+ 4.Ng7
00:00  06.00  4.73   1..d1=Q 2.Rg7 Nc5 3.Nf7 Ne6 4.Rg2
00:01  07.00  5.03   1..d1=Q 2.Re7 Nc5 3.Ne6 dxd5 4.Re8+
                       Kb7  (0)

00:01  08.00  5.09   1..d1=Q 2.Re7 Nc5 3.Ne6 dxd5 4.Re8+
                       Kb7  (1)

00:02  09.00  5.47   1..d1=Q 2.Re7 dxg4+ 3.Rg7 gxc8 4.Kh7
                       Nf4  (1)

00:04  10.00  5.90   1..d1=Q 2.Ne6 dxg4+ 3.Ng7 Ne5 4.Rf5
                       g3  (2)

00:06  11.00  5.91   1..d1=Q 2.Ne6 Ne5 3.Re7 dxg4+ 4.Ng7
                       gxg5  (4)

01:16  12.00  6.55   1..d1=Q 2.Rf8 dxg4+ 3.Kh7 gxh4+
                       4.Kg8 hxg5+  (14)

03:43  13.00  6.15   1..d1=Q 2.Rf8 dxg1=Q+ 3.Kh7 gxh2+
                       4.Kg7 hxe5+  (91)

06:14  14.00  6.13   1..d1=Q 2.Rf8 dxg4+ 3.Kh7 gxh4+
                       4.Kg7 hxg5+  (230)

25:49  15.00  6.59   1..d1=Q 2.Rf8 dxg4+ 3.Kh7 gxh4+
                       4.Kg8 hxg5+  (943)

07:27  16.00  6.59   1..d1=Q 2.Rf8 dxg4+ 3.Kh7 gxh4+
                       4.Kg8 hxg5+  (5191)


Positions                :     291.773.916
Nodes per second         :           8.317

Extensions (checks)      :     129.728.673 (0%)
Extensions (captures)    :      28.229.018 (-5%)
Extensions (king safety) :         727.558 (0%)
Extensions (on depth)    :               0 (0%)
Extensions (remaining)   :          37.104 (0%)
Extensions (total)       :     158.722.352 (54%)

Hash Table               : 74.231.648  74.231.648  (99%)
Average depth            :  2
Deepest depth            : 48







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