Author: Dann Corbit
Date: 23:19:57 03/07/99
Go up one level in this thread
On March 06, 1999 at 14:59:14, blass uri wrote:
>3r1r1k/2n1Qp1p/1q2pNpP/p3P3/1ppp4/3P2P1/PP3Pb1/R3R1K1 w - - 0 1
>
>Ne8 is mate in 10.
>
>It is easy for programs to find Ne8 but it is hard to find the mate.
>
>CM6000 sees mate in 10 in 3 minutes on pentium200MMX.
>My other programs are significantly slower and I do not know their time.
Crafty failed after 15 minutes on a PII 300 (and I have most of the tablebase
files). CM6000 must be doing some very clever singular extensions, since 20 ply
is quite a distance to cover in 3 minutes. What is the correct mating sequence?
E:\crafty\Release>crafty2
EPD Kit revision date: 1996.04.21
unable to open book file [e:/crafty/release/book.bin].
book is disabled
unable to open book file [e:/crafty/release/books.bin].
search time set to 900.00.
using cpu time
Crafty 16.5 vs ferret
pondering enabled.
EGTB cache memory = 16M bytes.
hash table memory = 48M bytes.
pawn hash table memory = 8M bytes.
play best book line after search.
EGTB access enabled
using tbpath=e:/crafty/release/tb,F:/KBP
5 piece tablebase files found
9904kb of RAM used for TB indices and decompression tables
PFGA: EPD record: 1
middle-game phase
clearing hash tables
time surplus 0.00 time limit 15:00 (15:00) [easy move]
depth time score variation (1)
White(1): exit 5 0.07 30/37 1. Ng4
5-> 0.09 0.00 1. Ne8 Kg8 2. Nf6+ Kh8
6 0.11 0.00 1. Ne8 Kg8 2. Nf6+ Kh8
6-> 0.16 0.00 1. Ne8 Kg8 2. Nf6+ Kh8
7 0.23 0.00 1. Ne8 Kg8 2. Nf6+ Kh8
7-> 0.52 0.00 1. Ne8 Kg8 2. Nf6+ Kh8
8 0.64 0.00 1. Ne8 Kg8 2. Nf6+ Kh8
8-> 1.64 0.00 1. Ne8 Kg8 2. Nf6+ Kh8
9 2.19 ++ 1. Ne8!!
9 6.35 6.16 1. Ne8 Kg8 2. Nxc7 Rfe8 3. Nxe8 Rc8
4. Nf6+ Kh8 5. Kxg2 Qc6+ 6. Re4 cxd3
7. Qxf7
9-> 7.08 6.16 1. Ne8 Kg8 2. Nxc7 Rfe8 3. Nxe8 Rc8
4. Nf6+ Kh8 5. Kxg2 Qc6+ 6. Re4 cxd3
7. Qxf7
10 8.65 6.16 1. Ne8 Kg8 2. Nxc7 Rfe8 3. Nxe8 Rc8
4. Nf6+ Kh8 5. Kxg2 cxd3 6. Qxf7 Qc6+
7. Re4
10-> 11.34 6.16 1. Ne8 Kg8 2. Nxc7 Rfe8 3. Nxe8 Rc8
4. Nf6+ Kh8 5. Kxg2 cxd3 6. Qxf7 Qc6+
7. Re4
11 17.57 ++ 1. Ne8!!
11 46.65 11.02 1. Ne8 Kg8 2. Nxc7 Rfe8 3. Nxe8 cxd3
4. Nf6+ Kh8 5. Nd7 Kg8 6. Nxb6 Rb8
7. Kxg2 Rxb6
11-> 50.92 11.02 1. Ne8 Kg8 2. Nxc7 Rfe8 3. Nxe8 cxd3
4. Nf6+ Kh8 5. Nd7 Kg8 6. Nxb6 Rb8
7. Kxg2 Rxb6
12 1:12 ++ 1. Ne8!!
12-> 1:47 11.41 1. Ne8 Kg8 2. Nxc7 Rfe8 3. Nxe8 cxd3
4. Nf6+ Kh8 5. Nd7 Kg8 6. Nxb6 Rb8
7. Kxg2 Rxb6
13 2:57 ++ 1. Ne8!!
time=15:00 cpu=100% mat=-4 n=145315101 fh=90% nps=161414
ext-> checks=13028623 recaps=359171 pawns=994505 1rep=2039009
predicted=0 nodes=145315101 evals=8786581
endgame tablebase-> probes done=0 successful=0 plimit=17
SMP-> split=0 stop=0 data=0/64 cpu=15:00 elap=15:00
Crafty v16.5 (1 cpus)
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