Author: Dann Corbit
Date: 13:08:11 09/12/01
Go up one level in this thread
On September 12, 2001 at 10:45:44, leonid wrote:
>On September 12, 2001 at 10:34:41, leonid wrote:
>
>>[D]Q6r/1prpbqk1/1Q4q1/1Q1nn1p1/1Q1NN1p1/1R4q1/1BBQQRp1/K6b w - -
>>
>>Please indicate your result.
According to chest, it's not a mate in 8.
Crafty can't spot it, but I did not expect 17+ ply to be exhausted:
EPD Kit revision date: 1996.04.21
unable to open book file [e:\crafty\release/books.bin].
hash table memory = 192M bytes.
pawn hash table memory = 80M bytes.
EGTB cache memory = 32M 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.
5 piece tablebase files found
19045kb of RAM used for TB indices and decompression tables
Crafty v18.10
White(1): st 999
search time set to 999.00.
White(1): epdpfga \t.epd t.out
PFGA: EPD record: 1
middle-game phase
clearing hash tables
time surplus 0.00 time limit 16:39 (16:39)
nss depth time score variation (1)
1 0.03 26.76 1. Rxf7+ Qxf7
1-> 0.05 26.76 1. Rxf7+ Qxf7
2 0.05 26.75 1. Rxf7+ Qxf7 2. Rxg3 Rxa8+
2-> 0.19 26.75 1. Rxf7+ Qxf7 2. Rxg3 Rxa8+
3 0.20 -- 1. Rxf7+
3 0.23 24.14 1. Rxf7+ Qxf7 2. Qxh8+ Kxh8 3. Qh6+
Kg8 4. Rxg3 Bxb4 5. Qdxg5+
3-> 0.63 24.14 1. Rxf7+ Qxf7 2. Qxh8+ Kxh8 3. Qh6+
Kg8 4. Rxg3 Bxb4 5. Qdxg5+
4 0.79 24.14 1. Rxf7+ Qxf7 2. Qxh8+ Kxh8 3. Qh6+
Kg8 4. Rxg3 Bxb4 5. Qdxg5+
4-> 2.13 24.14 1. Rxf7+ Qxf7 2. Qxh8+ Kxh8 3. Qh6+
Kg8 4. Rxg3 Bxb4 5. Qdxg5+
5 2.17 ++ 1. Rxf7+!!
5 3.91 26.23 1. Rxf7+ Qxf7 2. Qxh8+ Kxh8 3. Rxg3
Bxb4 4. Qh6+ Kg8 5. Qdxg5+ Ng6 6. Qbxd5
5-> 8.16 26.23 1. Rxf7+ Qxf7 2. Qxh8+ Kxh8 3. Rxg3
Bxb4 4. Qh6+ Kg8 5. Qdxg5+ Ng6 6. Qbxd5
6 8.37 ++ 1. Rxf7+!!
6 19.60 26.77 1. Rxf7+ Qxf7 2. Qxh8+ Kxh8 3. Qh6+
Kg8 4. Nf6+ Nxf6 5. Qdxg5+ Ng6 6. Qhxg6+
Qxg6 7. Qxg6+ Kh8 8. Rxg3 Bxb4 9. Qxb4
6-> 38.74 26.77 1. Rxf7+ Qxf7 2. Qxh8+ Kxh8 3. Qh6+
Kg8 4. Nf6+ Nxf6 5. Qdxg5+ Ng6 6. Qhxg6+
Qxg6 7. Qxg6+ Kh8 8. Rxg3 Bxb4 9. Qxb4
7 40.59 ++ 1. Rxf7+!!
7 2:39 28.64 1. Rxf7+ Qxf7 2. Nf5+ Qxf5 3. Qxh8+
Kxh8 4. Qh6+ Qh7 5. Qxh7+ Kxh7 6. Nxg3+
Ng6 7. Qbd4 Bc5
7-> 3:37 28.64 1. Rxf7+ Qxf7 2. Nf5+ Qxf5 3. Qxh8+
Kxh8 4. Qh6+ Qh7 5. Qxh7+ Kxh7 6. Nxg3+
Ng6 7. Qbd4 Bc5
8 3:37 ++ 1. Rxf7+!!
time=16:39 cpu=99% mat=22 n=589487968 fh=99% nps=590k
ext-> chk=80125742 cap=1032919 pp=36146 1rep=5779692 mate=87
predicted=0 nodes=589487968 evals=3796048
endgame tablebase-> probes done=0 successful=0
So tell me, what's the solution?
Pretty diagram, by the way.
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