Author: Pete Galati
Date: 16:35:19 02/14/01
Go up one level in this thread
On February 14, 2001 at 16:29:28, Uri Blass wrote:
>On February 14, 2001 at 13:55:54, Jeremiah Penery wrote:
>
>>On February 14, 2001 at 06:38:34, leonid wrote:
>>
>>>Hi!
>>>
>>>If you like to solve forced mate then you can try this:
>>>
>>>[D]2kr3r/qq2q1qp/nnb1nbn1/1B2QnN1/3N1Q2/1NQ1B1B1/1P4Q1/R1R3K1 w - -
>>>
>>>Please, indicate your result.
>>
>>Modified Crafty with Singular Extensions finds:
>>
>>9 15:20 Mat09 1. Qcxc6+ Nec7 2. Qxb7+ Qxb7 3. Qxb7+
>> Kxb7 4. Rxc7+ Nxc7 5. Qxc7+ Qxc7 6.
>> Nc5+ Qxc5 7. Ba6+ Ka7 8. Bc8+ Na4 9.
>> Qb8# <HT>
>>
>>Maybe the number of moves will go down later, but I'm not going to let it search
>>any longer. :)
>
>Is it the first mate that your modified Crafty discovers
>If it is then Junior is faster:
>
>Junior5.9 on p200 has the follwong evaluation
>
>9 0:52 MATE10 1.Qcxc6+ Nec7 2.Qxb7+ Qxb7 3.Qxb7+ Kxb7 4.Bxa6+ Ka8 5.Bf1+ Kb8
>6.Nc6+ Kb7 7.Ra7+ Kc8 8.Qxc7+ Qxc7 9.Qxf5+ Qgd7 10.Rxc7#
>
>Unfortunately Junior stops to search when it finishes iteration when it finds a
>mate for itself.
>
>I guess that chessmaster is faster in finding a mate but I did not check it.
>
>Uri
I fed this epd into Crafty way earlier today, but I've been too busy to post
this. Crafty worked on this for a long time, I doubt that it would find one
less than 8 moves.
5 piece tablebase files found
1836kb of RAM used for TB indices and decompression tables
EGTB cache memory = 3M bytes.
hash table memory = 48M bytes.
pawn hash table memory = 5M bytes.
Crafty v18.3
White(1): 2kr3r/qq2q1qp/nnb1nbn1/1B2QnN1/3N1Q2/1NQ1B1B1/1P4Q1/R1R3K1 w - -
+---+---+---+---+---+---+---+---+
8 | | | *K| *R| | | | *R|
+---+---+---+---+---+---+---+---+
7 | *Q| *Q| | | *Q| | *Q| *P|
+---+---+---+---+---+---+---+---+
6 | *N| *N| *B| | *N| *B| *N| |
+---+---+---+---+---+---+---+---+
5 | | B | | | Q | *N| N | |
+---+---+---+---+---+---+---+---+
4 | | | | N | | Q | | |
+---+---+---+---+---+---+---+---+
3 | | N | Q | | B | | B | |
+---+---+---+---+---+---+---+---+
2 | | P | | | | | Q | |
+---+---+---+---+---+---+---+---+
1 | R | | R | | | | K | |
+---+---+---+---+---+---+---+---+
a b c d e f g h
White(1): analzye
Illegal move: analzye
White(1): analyze
clearing hash tables
time surplus 0.00 time limit 30.00 (3:30)
nss depth time score variation (1)
4 0.90 7.30 1. Qcxc6+ Nac7 2. Rxa7 Qxc6 3. Nxc6
Ngxf4 4. Nxe7+ Qxe7
4 1.17 7.37 1. Qgxc6+ Nec7 2. Qfxf5+ Kb8 3. Qxe7
Bxe7
4-> 1.29 7.37 1. Qgxc6+ Nec7 2. Qfxf5+ Kb8 3. Qxe7
Bxe7
5 1.40 ++ 1. Qgxc6+!!
5 2.92 13.08 1. Qcxc6+ Nec7 2. Qxb7+ Qxb7 3. Bxa6
Nd5 4. Qxc7+ Qxc7 5. Bxb7+ Kxb7 6.
Rxc7+
5-> 3.19 13.08 1. Qcxc6+ Nec7 2. Qxb7+ Qxb7 3. Bxa6
Nd5 4. Qxc7+ Qxc7 5. Bxb7+ Kxb7 6.
Rxc7+
6 3.63 ++ 1. Qcxc6+!!
6 10.24 16.35 1. Qcxc6+ Nec7 2. Bxa6 Qaxa6 3. Qcxc7+
Qexc7 4. Rxc7+ Kb8 5. Rxb7+ Kc8 6.
Qfxf5+
6-> 11.83 16.35 1. Qcxc6+ Nec7 2. Bxa6 Qaxa6 3. Qcxc7+
Qexc7 4. Rxc7+ Kb8 5. Rxb7+ Kc8 6.
Qfxf5+
7 20.36 16.29 1. Qcxc6+ Nec7 2. Bxa6 Qxe5 3. Qxb7+
Qxb7 4. Qxb7+ Kd7 5. Qxf5+ Qxf5 6.
Qc6+ Ke7 7. Nxf5+ Kf8 8. Nxg7 Kxg7
9. Bxc7
7-> 35.85 16.29 1. Qcxc6+ Nec7 2. Bxa6 Qxe5 3. Qxb7+
Qxb7 4. Qxb7+ Kd7 5. Qxf5+ Qxf5 6.
Qc6+ Ke7 7. Nxf5+ Kf8 8. Nxg7 Kxg7
9. Bxc7
8 38.99 ++ 1. Qcxc6+!!
8 3:48 Mat09 1. Qcxc6+ Nec7 2. Qxb7+ Qxb7 3. Qxb7+
Kxb7 4. Rxc7+ Nxc7 5. Qxc7+ Qxc7 6.
Nc5+ Qxc5 7. Ba6+ Ka7 8. Bc8+ Na4 9.
Qb8#
8 5:04 Mat08 1. Qgxc6+ Nac7 2. Rxa7 Qxa7 3. Qcxc7+
Nxc7 4. Qexc7+ Qaxc7 5. Qcxc7+ Qxc7
6. Rxc7+ Kb8 7. Rc8+ Kxc8 8. Qb8#
8-> 5:10 Mat08 1. Qgxc6+ Nac7 2. Rxa7 Qxa7 3. Qcxc7+
Nxc7 4. Qexc7+ Qaxc7 5. Qcxc7+ Qxc7
6. Rxc7+ Kb8 7. Rc8+ Kxc8 8. Qb8#
9 7:48 Mat08 1. Qgxc6+ Nac7 2. Rxa7 Qxa7 3. Qcxc7+
Nxc7 4. Qexc7+ Qaxc7 5. Qcxc7+ Qxc7
6. Rxc7+ Kb8 7. Rc8+ Kxc8 8. Qb8#
9-> 19:02 Mat08 1. Qgxc6+ Nac7 2. Rxa7 Qxa7 3. Qcxc7+
Nxc7 4. Qexc7+ Qaxc7 5. Qcxc7+ Qxc7
6. Rxc7+ Kb8 7. Rc8+ Kxc8 8. Qb8#
10 52:06 Mat08 1. Qgxc6+ Nac7 2. Rxa7 Qxa7 3. Qcxc7+
Nxc7 4. Qexc7+ Qaxc7 5. Qcxc7+ Qxc7
6. Rxc7+ Kb8 7. Rc8+ Kxc8 8. Qb8#
10-> 116:48 Mat08 1. Qgxc6+ Nac7 2. Rxa7 Qxa7 3. Qcxc7+
Nxc7 4. Qexc7+ Qaxc7 5. Qcxc7+ Qxc7
6. Rxc7+ Kb8 7. Rc8+ Kxc8 8. Qb8#
11 319:52 Mat08 1. Qgxc6+ Nac7 2. Rxa7 Qxa7 3. Qcxc7+
Nxc7 4. Qexc7+ Qaxc7 5. Qcxc7+ Qxc7
6. Rxc7+ Kb8 7. Rc8+ Kxc8 8. Qb8#
White(1): exit
White(1): q
execution complete.
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Last modified: Thu, 15 Apr 21 08:11:13 -0700
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