Author: Dann Corbit
Date: 20:11:54 02/13/01
Go up one level in this thread
On February 13, 2001 at 18:34:50, Gordon Rattray wrote:
>On February 13, 2001 at 13:36:33, Dieter Buerssner wrote:
>
>>On February 13, 2001 at 12:32:52, José Antônio Fabiano Mendes wrote:
>>
>>> Mark Dvoretsky,"Art of Analysis",1989
>>> White to play and win
>>> [D]8/8/8/7k/3r3P/3PR1K1/8/8 w
>>
>>With Yace, I only get a draw score.
>>
>>> Source: http://www.chessplayer.com/RookDvoretsky.htm
>>
>>[After 1. Re5 Kg6 2. Re6+]
>>
>>Other moves considered in the book are 1) 2...Kf5 3.Re3 Rg4+ (another
>>possibility is 3...Rd8+ 4.Rf3+! and Black is lost, since going to the file means
>>White's h-pawn advances forward, while alternative 4...Rg6 5.Kf2 leads to a lost
>>position as well.) 4.Kh3 Rg1 5.Rf3+ Ke5 (5...Kg6 6.Rg3+ Rxg3+ 7.Kxg3+-)
>>6.h5+-; and White wins.
>>
>>Here Yace wants to play 3...Kf6 and again shows draw score. What is the
>>winning line after 3...Kf6 ?
>>I only find:
>>
>> 36963 2.335 0.00 14. 4.h5 Kg5 5.Rf3 Kxh5 {EGTB}
>>
>>This doesn't change for a few minutes.
>>
>>Regards,
>>Dieter
>
>
>After looking at it with Junior6, Fritz6a and Shredder5 (each using all 5 piece
>tablebases), I also cannot see anything other than a draw afer 3) .. Kf6
If there is a win from here, Crafty cannot find it (and Crafty prefers Re5+ Kg6
2. Re6+ ... which is the suggested line).
EPD Kit revision date: 1996.04.21
found computer opening book file [e:\crafty\release/bookc.bin].
hash table memory = 96M bytes.
pawn hash table memory = 10M bytes.
EGTB cache memory = 64M bytes.
draw score set to 0.00 pawns.
choose from book moves randomly (using weights.)
choose from 5 best moves.
book learning enabled
result learning enabled
position learning enabled
threshold set to 9 pawns.
6 piece tablebase files found
20899kb of RAM used for TB indices and decompression tables
Crafty v18.3
White(1): st 9999
search time set to 9999.00.
White(1): epdpfga aofa.epd aofa.out
PFGA: EPD record: 1
end-game phase
clearing hash tables
time surplus 0.00 time limit 166:39 (166:39)
nss depth time score variation (1)
12 2.34 1.74 1. Re5+ Kh6 2. Re6+ Kh5 3. Re3 Kg6
4. Rf3 Kh5 5. Kf2 Rg4 6. Ke3 Kxh4 7.
d4 Kg5
12-> 2.34 1.74 1. Re5+ Kh6 2. Re6+ Kh5 3. Re3 Kg6
4. Rf3 Kh5 5. Kf2 Rg4 6. Ke3 Kxh4 7.
d4 Kg5
13 4.42 -- 1. Re5+
13 4.84 1.14 1. Re5+ Kh6 2. Re6+ Kg7 3. Re3 Kf6
4. Rf3+ Kg6 5. Kh3 Kh5 6. Rf5+ Kg6
7. Rg5+ Kh6 8. Rg4 Rxd3+ 9. Kg2 Re3
10. Kh2
13-> 4.84 1.14 1. Re5+ Kh6 2. Re6+ Kg7 3. Re3 Kf6
4. Rf3+ Kg6 5. Kh3 Kh5 6. Rf5+ Kg6
7. Rg5+ Kh6 8. Rg4 Rxd3+ 9. Kg2 Re3
10. Kh2
14 6.21 0.98 1. Re5+ Kh6 2. Re6+ Kg7 3. Re3 Kf6
4. Rf3+ Kg6 5. Kh3 Kh5 6. Rf5+ Kg6
7. Rg5+ Kh6 8. Rg4 Rxd3+ 9. Kg2 Kh5
10. Re4 Kg6
14-> 6.21 0.98 1. Re5+ Kh6 2. Re6+ Kg7 3. Re3 Kf6
4. Rf3+ Kg6 5. Kh3 Kh5 6. Rf5+ Kg6
7. Rg5+ Kh6 8. Rg4 Rxd3+ 9. Kg2 Kh5
10. Re4 Kg6
15 6.24 -- 1. Re5+
15 9.75 0.01 1. Re5+ Kh6 2. Re6+ Kg7 3. Re3 Kf6
4. Kh3 Kg6 5. Rg3+ Kh5 6. Rg5+ Kh6
7. Rg4 Rxd3+ <HT>
15-> 9.76 0.01 1. Re5+ Kh6 2. Re6+ Kg7 3. Re3 Kf6
4. Kh3 Kg6 5. Rg3+ Kh5 6. Rg5+ Kh6
7. Rg4 Rxd3+ <HT>
16 14.03 0.01 1. Re5+ Kh6 2. Re6+ Kg7 3. Re3 Kf6
4. Kh3 Kg6 5. Rg3+ Kh5 6. Rg5+ Kh6
7. Rg4 Rxd3+ <HT>
16-> 14.04 0.01 1. Re5+ Kh6 2. Re6+ Kg7 3. Re3 Kf6
4. Kh3 Kg6 5. Rg3+ Kh5 6. Rg5+ Kh6
7. Rg4 Rxd3+ <HT>
17 24.48 0.01 1. Re5+ Kh6 2. Re6+ Kg7 3. Re3 Kf6
4. Kh3 Kg6 5. Rg3+ Kh5 6. Rg5+ Kh6
7. Rg4 Rxd3+ <HT>
17-> 24.49 0.01 1. Re5+ Kh6 2. Re6+ Kg7 3. Re3 Kf6
4. Kh3 Kg6 5. Rg3+ Kh5 6. Rg5+ Kh6
7. Rg4 Rxd3+ <HT>
18 36.75 0.01 1. Re5+ Kh6 2. Re6+ Kg7 3. Re3 Kf6
4. Kh3 Kg6 5. Rg3+ Kh5 6. Rg5+ Kh6
7. Rg4 Rxd3+ <HT>
18-> 36.77 0.01 1. Re5+ Kh6 2. Re6+ Kg7 3. Re3 Kf6
4. Kh3 Kg6 5. Rg3+ Kh5 6. Rg5+ Kh6
7. Rg4 Rxd3+ <HT>
19 1:08 0.01 1. Re5+ Kh6 2. Re6+ Kg7 3. Re3 Kf6
4. Kh3 Kg6 5. Rg3+ Kh5 6. Rg5+ Kh6
7. Rg4 Rxd3+ <HT>
19-> 1:08 0.01 1. Re5+ Kh6 2. Re6+ Kg7 3. Re3 Kf6
4. Kh3 Kg6 5. Rg3+ Kh5 6. Rg5+ Kh6
7. Rg4 Rxd3+ <HT>
20 1:48 0.01 1. Re5+ Kh6 2. Re6+ Kg7 3. Re3 Kf6
4. Kh3 Kg6 5. Rg3+ Kh5 6. Rg5+ Kh6
7. Rg4 Rxd3+ <HT>
20-> 1:48 0.01 1. Re5+ Kh6 2. Re6+ Kg7 3. Re3 Kf6
4. Kh3 Kg6 5. Rg3+ Kh5 6. Rg5+ Kh6
7. Rg4 Rxd3+ <HT>
21 3:25 0.01 1. Re5+ Kh6 2. Re6+ Kg7 3. Re3 Kf6
4. Kh3 Kg6 5. Rg3+ Kh5 6. Rg5+ Kh6
7. Rg4 Rxd3+ <HT>
21-> 3:25 0.01 1. Re5+ Kh6 2. Re6+ Kg7 3. Re3 Kf6
4. Kh3 Kg6 5. Rg3+ Kh5 6. Rg5+ Kh6
7. Rg4 Rxd3+ <HT>
22 7:18 0.01 1. Re5+ Kh6 2. Re6+ Kg7 3. Re3 Kf6
4. Kh3 Kg6 5. Rg3+ Kh5 6. Rg5+ Kh6
7. Rg4 Rxd3+ <HT>
22-> 7:18 0.01 1. Re5+ Kh6 2. Re6+ Kg7 3. Re3 Kf6
4. Kh3 Kg6 5. Rg3+ Kh5 6. Rg5+ Kh6
7. Rg4 Rxd3+ <HT>
23 69:32 0.01 1. Re5+ Kh6 2. Re6+ Kg7 3. Re3 Kf6
4. Kh3 Kg6 5. Rg3+ Kh5 6. Rg5+ Kh6
7. Rg4 Rxd3+ <HT>
23-> 69:32 0.01 1. Re5+ Kh6 2. Re6+ Kg7 3. Re3 Kf6
4. Kh3 Kg6 5. Rg3+ Kh5 6. Rg5+ Kh6
7. Rg4 Rxd3+ <HT>
time=166:39 cpu=99% mat=2 n=2630622452 fh=7% nps=263084
ext-> chk=423619460 cap=0 pp=2388991 1rep=3197700 mate=1588341
predicted=0 nodes=2630622452 evals=460006183
endgame tablebase-> probes done=6454709 successful=5727066
The counters are way off, because this was run on a 1GHz machine for nearly 3
hours.
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Last modified: Thu, 15 Apr 21 08:11:13 -0700
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