Author: Dann Corbit
Date: 14:25:38 02/03/00
Go up one level in this thread
On February 03, 2000 at 17:08:37, Amir Ban wrote:
>
>There's an article by Nunn & Friedel in the latest ICCAJ called "Brains of the
>Earth" on a contest to solve 6 very hard king & pawn endings. The article says
>solving this suite in 24 hours was an exceptional achievement, and Kasparov made
>an amazing achievement of solving it in 45 minutes. It's also possible to
>understand from the article that Hiarcs could not solve the set.
>
>So I set up the EPD, intending to let Junior think about it all night, but I was
>surprised to find that Junior (no tablebases) can find all 6 key moves in less
>than 2 minutes each.
>
>Here is the EPD:
>
>6k1/6p1/8/4K1P1/8/7P/8/8 w - - ; bm Kf4;
Crafty had a particularly fascinating reaction to this one. I'm not sure that
Kf4 is ideal. Consider the following:
book is disabled
unable to open book file [e:/crafty/release/books.bin].
search time set to 1000.00.
using cpu time
Crafty 17.7 vs ferret
pondering enabled.
ERROR "remfish " is unknown rc-file option
EGTB cache memory = 16M bytes.
ERROR. Minimum hash table size is 48K bytes.
pawn hash table memory = 8M bytes.
play best book line after search.
EGTB access enabled
using tbpath=e:/crafty/release/tb,F:/KBP
4 piece tablebase files found
1302kb of RAM used for TB indices and decompression tables
PFGA: EPD record: 1
end-game phase
clearing hash tables
time surplus 0.00 time limit 16:40 (16:40)
nss depth time score variation (1)
White(1): exit
14 1.68 -- 1. Ke6
14 1.71 3.73 1. Ke6 Kf8 2. h4 Ke8 3. h5 Kf8 4. g6
Kg8 5. Ke7 Kh8 6. Kd7 Kg8 7. Ke7 <HT>
14-> 2.01 3.73 1. Ke6 Kf8 2. h4 Ke8 3. h5 Kf8 4. g6
Kg8 5. Ke7 Kh8 6. Kd7 Kg8 7. Ke7 <HT>
15 2.05 3.73 1. Ke6 Kf8 2. h4 Ke8 3. h5 Kf8 4. g6
Kg8 5. Kf5 Kf8 6. Ke6 <HT>
15-> 2.68 3.73 1. Ke6 Kf8 2. h4 Ke8 3. h5 Kf8 4. g6
Kg8 5. Kf5 Kf8 6. Ke6 <HT>
16 2.89 -- 1. Ke6
16 2.89 3.73 1. Ke6 Kf8 2. h4 Ke8 3. h5 Kf8 4. Kf5
Kf7 5. g6+ Ke7 6. Ke5 Ke8 7. Kd6 Kf8
8. Ke6 Kg8 9. Ke7 Kh8 <HT>
16-> 3.19 3.73 1. Ke6 Kf8 2. h4 Ke8 3. h5 Kf8 4. Kf5
Kf7 5. g6+ Ke7 6. Ke5 Ke8 7. Kd6 Kf8
8. Ke6 Kg8 9. Ke7 Kh8 <HT>
17 3.46 -- 1. Ke6
17 3.46 3.53 1. Ke6 Kf8 2. h4 Ke8 3. g6 Kf8 4. h5
Kg8 5. Ke7 Kh8 6. Kd8 Kg8 7. Ke8 Kh8
8. h6 Kg8 9. h7+ Kh8 10. Kf7
17-> 3.87 3.53 1. Ke6 Kf8 2. h4 Ke8 3. g6 Kf8 4. h5
Kg8 5. Ke7 Kh8 6. Kd8 Kg8 7. Ke8 Kh8
8. h6 Kg8 9. h7+ Kh8 10. Kf7
18 3.88 ++ 1. Ke6!!
18-> 4.08 3.92 1. Ke6 Kf8 2. h4 Ke8 3. g6 Kf8 4. h5
Kg8 5. Ke7 Kh8 6. Kd8 Kg8 7. Ke8 Kh8
8. h6 Kg8 9. h7+ Kh8 10. Kf7
19 4.24 3.73 1. Ke6 Kf8 2. h4 Ke8 3. h5 Kf8 4. Kf5
Kf7 5. g6+ Ke7 6. Kg5 Kf8 7. Kg4 Kg8
8. Kf5 Kh8 9. Ke5 <HT>
19-> 4.76 3.73 1. Ke6 Kf8 2. h4 Ke8 3. h5 Kf8 4. Kf5
Kf7 5. g6+ Ke7 6. Kg5 Kf8 7. Kg4 Kg8
8. Kf5 Kh8 9. Ke5 <HT>
20 4.82 3.73 1. Ke6 Kf8 2. h4 Ke8 3. h5 Kf8 4. Kf5
Kf7 5. g6+ Ke7 6. Kg5 Kf8 7. Kf4 Ke7
8. Kf5 Kf8 9. Ke6 Kg8 10. Ke7 Kh8 <HT>
20 5.05 ++ 1. Kf4!!
20-> 5.13 4.12 1. Kf4
21 5.24 3.73 1. Kf4 Kf8 2. Kg4 Kg8 3. g6 Kf8 4.
h4 Ke7 5. h5 Kf6 6. Kf4 Ke7 7. Kf5
Kf8 8. Ke5 Ke8 9. Kd6 Kf8 10. Ke6 <HT>
21-> 5.49 3.73 1. Kf4 Kf8 2. Kg4 Kg8 3. g6 Kf8 4.
h4 Ke7 5. h5 Kf6 6. Kf4 Ke7 7. Kf5
Kf8 8. Ke5 Ke8 9. Kd6 Kf8 10. Ke6 <HT>
22 5.50 ++ 1. Kf4!!
22-> 5.71 4.12 1. Kf4 Kf8 2. Kg4 Kg8 3. g6 Kf8 4.
h4 Ke7 5. h5 Kf6 6. Kf4 Ke7 7. Kf5
Kf8 8. Ke5 Ke8 9. Kd6 Kf8 10. Ke6 <HT>
23 6.06 3.73 1. Kf4 Kf8 2. Kg4 Kg8 3. g6 Kf8 4.
h4 Ke7 5. h5 Kf6 6. Kf4 Ke7 7. Kf5
Kf8 8. Ke5 Ke8 9. Kd6 Kf8 10. Ke6 <HT>
23-> 6.45 3.73 1. Kf4 Kf8 2. Kg4 Kg8 3. g6 Kf8 4.
h4 Ke7 5. h5 Kf6 6. Kf4 Ke7 7. Kf5
Kf8 8. Ke5 Ke8 9. Kd6 Kf8 10. Ke6 <HT>
24 6.56 ++ 1. Kf4!!
24-> 6.86 4.12 1. Kf4 Kf8 2. Kg4 Kg8 3. g6 Kf8 4.
h4 Ke7 5. h5 Kf6 6. Kf4 Ke7 7. Kf5
Kf8 8. Ke5 Ke8 9. Kd6 Kf8 10. Ke6 <HT>
25 6.94 ++ 1. Kf4!!
25 7.25 10.26 1. Kf4 Kf8 2. Kg4 Kg8 3. Kh5 Kh7 4.
Kh4 g6 5. Kg4 Kg8 6. Kf4 Kf8 7. Ke5
Ke7 8. h4 Kf7 9. Kd6 Kf8 10. Ke6 <HT>
25-> 7.42 10.26 1. Kf4 Kf8 2. Kg4 Kg8 3. Kh5 Kh7 4.
Kh4 g6 5. Kg4 Kg8 6. Kf4 Kf8 7. Ke5
Ke7 8. h4 Kf7 9. Kd6 Kf8 10. Ke6 <HT>
26 7.43 ++ 1. Kf4!!
26-> 10.53 10.65 1. Kf4 Kf8 2. Kg4 Kg8 3. Kh5 Kh7 4.
Kh4 g6 5. Kg4 Kg8 6. Kf4 Kf8 7. Ke5
Ke7 8. h4 Kf7 9. Kd6 Kf8 10. Ke6 <HT>
27 11.02 -- 1. Kf4
27 11.52 3.93 1. Kf4 Kf8 2. Kg4 Kg8 3. Kh5 Kh7 4.
g6+ Kg8 5. h4 Kf8 6. Kg4 Ke7 7. h5
Kf6 8. Kf4 Ke7 9. Ke5 Ke8 10. Ke6 Kf8
11. Kf5 Ke7 12. Kg5 Kf8 13. h6 Kg8
14. h7+ Kh8 15. Kg4
27-> 11.64 3.93 1. Kf4 Kf8 2. Kg4 Kg8 3. Kh5 Kh7 4.
g6+ Kg8 5. h4 Kf8 6. Kg4 Ke7 7. h5
Kf6 8. Kf4 Ke7 9. Ke5 Ke8 10. Ke6 Kf8
11. Kf5 Ke7 12. Kg5 Kf8 13. h6 Kg8
14. h7+ Kh8 15. Kg4
28 12.25 -- 1. Kf4
28 12.89 2.08 1. Kf4 Kf8 2. Kg4 Kg8 3. g6 Kh8 4.
Kf5 Kg8 5. h4 Kh8 6. h5 Kg8 7. Ke5
Kh8 8. Kd6 Kg8 9. Kd5 Kf8 10. Ke6 Kg8
11. Kf5 Kf8 12. Kf4 Ke8 13. Kg5 Kf8
14. h6 Kg8
{Kf4 is sinking like a stone, but h4 goes through the roof! And g6 is pegging
the CPU for a long time so I'll bet it is even better when the wash is through.)
28 12.93 ++ 1. h4!!
28 7:30 4/9 1. g6
>k7/4p3/4p3/8/8/3P1P2/5P2/K7 w - - ; bm Kb2;
>8/4p3/2kp4/4p3/6K1/5P2/3P4/8 w - - ; bm Kg5;
>k7/8/1p6/p1p5/2P4K/8/PP6/8 w - - ; bm a4;
>8/8/p7/8/1P6/7p/P4k1P/3K4 w - - ; bm a3;
>8/5p1p/8/6k1/8/6P1/5PP1/7K w - - ; bm Kh2;
>
>I don't quite understand it.
>
>Amir
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