Author: Dann Corbit
Date: 22:16:18 12/28/00
Go up one level in this thread
On December 28, 2000 at 19:22:40, Dieter Buerssner wrote:
>On December 28, 2000 at 14:41:54, Uri Blass wrote:
>
>>>>>>R7/8/6k1/4n3/7p/5P2/5r1p/7K b - -
>
>>> 205922704 1351.9 Mat30 16t 1...Kf5 2.Ra4 Rxf3 3.Kxh2 Ng4+ 4.Kg2 Rf2+ 5.Kg1
>>> h3 6.Rxg4 h2+ 7.Kxf2 {EGTB} 7...h1=Q! 8.Rd4!
>>> Ke5! 9.Rd3! Qc1 10.Ke2! Ke4! 11.Rg3! Qc2+!
>>> 12.Ke1! Qc5! 13.Ke2! Qh5+! 14.Kf2! Qh2+! 15.Rg2!
>>> Qf4+! 16.Kg1! Ke3! 17.Rb2! Qe4 18.Rb3+! Ke2!
>>> 19.Rg3! Qd5! 20.Rg6! Qd4+! 21.Kh2! Qf4+! 22.Kg1!
>>> Kf3! 23.Rg2! Qh4! 24.Rg8! Qd4+ 25.Kh2! Qe5+!
>>> 26.Kh1 Qa1+! 27.Kh2! Qa2+! 28.Kg1! Qxg8+!
>>> 29.Kf1! Qg5 30.Ke1 Qc1#! {1001}
>
>>Which tablebases did you use?
>
>>It seems that you used only the 4 piece tablebases because the EGTB is only in
>>position with 4 pieces.
>
>Correct. I have all 4-men TBs installed. Also a very few 5-men, but I think
>nothing relevant to this position.
>
>>I guess that with the KRP vs KR tablebases you could find the mate faster.
>
>I think, you are correct, but I cannot test right now, because I do not have the
>disk space right now.
Does not seem to help crafty a lot, and I have the 5 piece files:
E:\crafty\release>crafty1
EPD Kit revision date: 1996.04.21
found computer opening book file [./bookc.bin].
hash table memory = 96M bytes.
pawn hash table memory = 40M 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 v17.14
White(1): st 999
search time set to 999.00.
White(1): epdpfga epd.epd eeeee.out
PFGA: EPD record: 1
end-game phase
clearing hash tables
time surplus 0.00 time limit 16:39 (16:39)
nss depth time score variation (1)
8 0.50 7.35 1. ... h3 2. Rg8+ Kf6 3. Rh8 Nxf3 4.
Rf8+ Kg5 5. Rxf3 Rxf3 6. Kxh2
8-> 1.12 7.35 1. ... h3 2. Rg8+ Kf6 3. Rh8 Nxf3 4.
Rf8+ Kg5 5. Rxf3 Rxf3 6. Kxh2
9 2.55 7.35 1. ... h3 2. Ra6+ Kf5 3. Ra8 Nxf3 4.
Rf8+ Ke4 5. Rf4+ Ke3 6. Rxf3+ Rxf3
7. Kxh2 Kf4
9-> 5.07 7.35 1. ... h3 2. Ra6+ Kf5 3. Ra8 Nxf3 4.
Rf8+ Ke4 5. Rf4+ Ke3 6. Rxf3+ Rxf3
7. Kxh2 Kf4
10 5.62 7.34 1. ... h3 2. Ra6+ Kf5 3. Ra4 Kf6 4.
Ra6+ Kg7 5. Ra7+ Kh6 6. Ra6+ Kh5 7.
Ra5 Re2
10-> 13.12 7.34 1. ... h3 2. Ra6+ Kf5 3. Ra4 Kf6 4.
Ra6+ Kg7 5. Ra7+ Kh6 6. Ra6+ Kh5 7.
Ra5 Re2
11 16.15 7.25 1. ... h3 2. Re8 Nxf3 3. Rg8+ Kf5 4.
Rf8+ Ke4 5. Rf4+ Kd5 6. Rf5+ Kd4 7.
Rf4+ Kd5 <HT>
11-> 35.55 7.25 1. ... h3 2. Re8 Nxf3 3. Rg8+ Kf5 4.
Rf8+ Ke4 5. Rf4+ Kd5 6. Rf5+ Kd4 7.
Rf4+ Kd5 <HT>
12 42.64 7.24 1. ... h3 2. Rg8+ Kf5 3. Rg3 Nxf3 4.
Rxh3 Ke6 5. Rh6+ Kd5 6. Rd6+ Ke4 7.
Rd4+ Ke3 8. Re4+ Kd3 9. Re8
12 50.83 7.29 1. ... Kf5 2. Ra4 h3 3. Rf4+ Ke6 4.
Re4 Kd6 5. Rf4 Rg2 6. Rd4+ Kc5 7. Rh4
Nxf3 8. Rxh3
12-> 1:09 7.29 1. ... Kf5 2. Ra4 h3 3. Rf4+ Ke6 4.
Re4 Kd6 5. Rf4 Rg2 6. Rd4+ Kc5 7. Rh4
Nxf3 8. Rxh3
13 1:15 7.64 1. ... Kf5 2. Ra4 Rxf3 3. Kxh2 Ng4+
4. Kg2 Rf2+ 5. Kg1 h3 6. Ra5+ Ke4 7.
Ra4+ Kf3 8. Ra3+ Ne3 9. Rd3 h2+ 10.
Kh1 Kf4
13-> 1:54 7.64 1. ... Kf5 2. Ra4 Rxf3 3. Kxh2 Ng4+
4. Kg2 Rf2+ 5. Kg1 h3 6. Ra5+ Ke4 7.
Ra4+ Kf3 8. Ra3+ Ne3 9. Rd3 h2+ 10.
Kh1 Kf4
14 2:02 7.54 1. ... Kf5 2. Ra4 Rxf3 3. Kxh2 Ng4+
4. Kg2 Rf2+ 5. Kg1 h3 6. Ra5+ Ke4 7.
Ra4+ Kf3 8. Ra3+ Ne3 9. Rd3 h2+ 10.
Kh1 Ke4 11. Rd8
14-> 4:25 7.54 1. ... Kf5 2. Ra4 Rxf3 3. Kxh2 Ng4+
4. Kg2 Rf2+ 5. Kg1 h3 6. Ra5+ Ke4 7.
Ra4+ Kf3 8. Ra3+ Ne3 9. Rd3 h2+ 10.
Kh1 Ke4 11. Rd8
15 4:30 ++ 1. ... Kf5!!
15 6:47 8.14 1. ... Kf5 2. Ra4 Rxf3 3. Ra8 Kf4 4.
Rd8 h3 5. Rg8 <HT>
15-> 11:22 8.14 1. ... Kf5 2. Ra4 Rxf3 3. Ra8 Kf4 4.
Rd8 h3 5. Rg8 <HT>
16 12:30 8.14 1. ... Kf5 2. Ra4 Rxf3 3. Ra8 Kf4 4.
Rd8 h3 5. Rg8 Re3 6. Rg7 Ra3 7. Rg8
<HT>
time=16:39 cpu=99% mat=4 n=474418606 fh=92% nps=474741
ext-> checks=29707476 recaps=227207 pawns=894354 1rep=1376639
thrt:374392
predicted=0 nodes=474418606 evals=38446894
endgame tablebase-> probes done=1984057 successful=1034743
One million successful probes, but checkmate not seen yet...
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