Author: Richard Pijl
Date: 12:35:45 12/29/03
Go up one level in this thread
On December 29, 2003 at 11:09:51, Brian Katz wrote:
>[D]8/r7/8/5bk1/8/5B2/5RPP/6K1 b
> The position above, which is the one we have been looking at for the
>past few days, is pretty interesting in that if you have the Tablebases turned
>on, it finds the solution
>correctly with also the correct =(0.00) evaluation that some engines don’t give.
>This is an 8 piece endgame, yet the program sees through to a 5 piece endgame
>with the Tablebases. That is pretty impressive. It finds the solution as =(0.00)
>rather than =(0.12). Most engines without Tablebases, find the correct sequence
>of moves, with basically a drawn evaluation, but some don’t realize that the
>evaluation should be =(0.00)
>
> Below, is a similar position to the one we have been looking for the last few
>days. I expanded on the position as mentioned by one of the posters by adding a
>file h pawns and moving the Black King to h8.
>This position is a 13 piece endgame. Let’s see if the Tablebases can see Thru 13
>pieces to a 5 piece endgame.
>
>[D]7k/r6P/7P/5b1P/7P/5B1P/5RPP/6K1 b
>
>This was after almost an hour and a half of analysis with the Tablebases turned
>on. Tablebase setting of 3 in Engine Parameters. Then again at a setting of 0
>(Zero).
>Beneath that will be a Half Hour of analysis without the use of Tablebases.
>Notice, without the Tablebases, it takes longer to evaluate the position even
>though this is not a 5 piece ending. The last analysis showing was at 59 min, 40
>secs with the Tablebase setting of 3. Further down I also have analysis with the
>Tablebase setting lowered to 0 rather than the default setting of 3. There are
>some interesting differences….
>Below that will be with no Tablebases at all For Fritz 8.
>After that you will see YACE PADERBORN FINDING = (0.00) IN ONLY 8 SECONDS!!
>
As Robert said earlier: Easy with the right knowledge.
The Baron without any TB's:
(note that -0.01 is a real draw score, meaning there is a material disadvantage
for the side to move, but draw nonetheless)
ply time nodes score pv
7(21)& 0:00.11 14294 -0.01 Ra7-a1 Rf2-f1 Ra1xf1 Kg1xf1 Bf5xh3 g2xh3
Kh8xh7 Bf3-e2 Kh7-g8 h6-h7 Kg8xh7 Kf1-e1
7(21). 0:00.11 19202 -0.01 Ra7-a1 Rf2-f1 Ra1xf1 Kg1xf1 Bf5xh3 g2xh3
Kh8xh7 Bf3-e2 Kh7-g8 h6-h7 Kg8xh7 Kf1-e1
8(23)& 0:00.16 29443 -0.01 Ra7-a1 Rf2-f1 Ra1xf1 Kg1xf1 Bf5xh3 g2xh3
Kh8xh7 Bf3-e2 Kh7-g8 h6-h7 Kg8xh7 Kf1-e1
8(23). 0:00.16 38170 -0.01 Ra7-a1 Rf2-f1 Ra1xf1 Kg1xf1 Bf5xh3 g2xh3
Kh8xh7 Bf3-e2 Kh7-g8 h6-h7 Kg8xh7 Kf1-e1
9(25)& 0:00.22 62488 -0.01 Ra7-a1 Rf2-f1 Ra1xf1 Kg1xf1 Bf5xh3 g2xh3
Kh8xh7 Bf3-e2 Kh7-g8 h6-h7 Kg8xh7 Kf1-e1
Kh7-g8 Be2-d1
9(25). 0:00.27 91373 -0.01 Ra7-a1 Rf2-f1 Ra1xf1 Kg1xf1 Bf5xh3 g2xh3
Kh8xh7 Bf3-e2 Kh7-g8 h6-h7 Kg8xh7 Kf1-e1
Kh7-g8 Be2-d1
10(27)& 0:00.38 162208 -0.01 Ra7-a1 Rf2-f1 Ra1xf1 Kg1xf1 Bf5xh3 g2xh3
Kh8xh7 Bf3-e2 Kh7-g8 h6-h7 Kg8xh7 Kf1-e1
Kh7-g8 Be2-d1
10(27). 0:00.55 228304 -0.01 Ra7-a1 Rf2-f1 Ra1xf1 Kg1xf1 Bf5xh3 g2xh3
Kh8xh7 Bf3-e2 Kh7-g8 h6-h7 Kg8xh7 Kf1-e1
Kh7-g8 Be2-d1
11(28)& 0:00.82 413757 -0.01 Ra7-a1 Rf2-f1 Ra1xf1 Kg1xf1 Bf5xh3 g2xh3
Kh8xh7 Bf3-e2 Kh7-g8 h6-h7 Kg8xh7 Kf1-e1
Kh7-g8 Be2-d1
11(31). 0:01.26 575511 -0.01 Ra7-a1 Rf2-f1 Ra1xf1 Kg1xf1 Bf5xh3 g2xh3
Kh8xh7 Bf3-e2 Kh7-g8 h6-h7 Kg8xh7 Kf1-e1
Kh7-g8
12(30)& 0:02.03 1124065 -0.01 Ra7-a1 Rf2-f1 Ra1xf1 Kg1xf1 Bf5xh3 g2xh3
Kh8xh7 Bf3-e2 Kh7-g8 h6-h7 Kg8xh7 Kf1-e1
Kh7-g8 h5-h6 Kg8-h7
12(33). 0:03.02 1385029 -0.01 Ra7-a1 Rf2-f1 Ra1xf1 Kg1xf1 Bf5xh3 g2xh3
Kh8xh7 Bf3-e2 Kh7-g8 h6-h7 Kg8xh7 Kf1-e1
Kh7-g8
13(33)& 0:04.89 3336774 -0.01 Ra7-a1 Rf2-f1 Ra1xf1 Kg1xf1 Bf5xh3 g2xh3
Kh8xh7 Bf3-e2 Kh7-g8 h6-h7 Kg8xh7 Kf1-e1
Kh7-g8 h5-h6 Kg8-h7
13(36). 0:06.59 4041744 -0.01 Ra7-a1 Rf2-f1 Ra1xf1 Kg1xf1 Bf5xh3 g2xh3
Kh8xh7 Bf3-e2 Kh7-g8 h6-h7 Kg8xh7 Kf1-e1
Kh7-g8
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