Author: Bernhard Bauer
Date: 07:50:48 08/24/98
Go up one level in this thread
On August 24, 1998 at 10:02:40, Robert Hyatt wrote:
>On August 24, 1998 at 08:53:01, Bernhard Bauer wrote:
>
>>On August 24, 1998 at 04:57:58, Andreas Stabel wrote:
>>
>>>I have discovered some small problems with crafty.
>>>
>>>1) If a castling leads to a check, crafty does not output the + after
>>> the move, i.e. O-O is output and not O-O+.
>>>
>>>2) Sometimes crafty does not output the right move list when in analyze
>>> mode. Enter crafty and then analyze mode. Type the
>>> moves a3, a6 and Nf3. If you now type history you only get the first
>>> moves. Below is the output:
>>>
>>> book 0.0s 29% g6
>>>analyze.Black(1): a6
>>>a6
>>>Black(1): a6
>>> clearing hash tables
>>> time surplus 0.00 time limit 30.00 (3:00)
>>> depth time score variation (1)
>>> 4-> 0.29 0.00 2. Nf3 Nc6 3. Nc3 Nf6
>>> 5 0.41 0.22 2. Nf3 Nc6 3. Nc3 Nf6 4. e4
>>> 5-> 0.99 0.22 2. Nf3 Nc6 3. Nc3 Nf6 4. e4
>>>Nf3 6 0.99 1/19 2. Nf3
>>>White(2): Nf3
>>>analyze.White(2): White(2): Nf3
>>> clearing hash tables
>>> time surplus 0.00 time limit 30.00 (3:00)
>>> depth time score variation (1)
>>>hi 5 0.20 4/19 2. ... d5
>>>Black(1): hi
>>> white black
>>> 1 a3 ...
>>> 5 1.09 -0.02 2. ... d5 3. e3 Nc6 4. Bd3 Bg4
>>> 5-> 1.24 -0.02 2. ... d5 3. e3 Nc6 4. Bd3 Bg4
>>> 6 2.28 -0.32 2. ... d5 3. e3 Bf5 4. Be2 e6 5. O-O
>>>
>>>Note that before the "hi" is typed, crafty outputs "Black(1): " , but it
>>>should have output "Black(2): ".
>>>
>>>3) Finally I have a position where crafty does not find a mate in one.
>>> Is this a bug or is it nullmove related or something ?
>>> The FEN is: 7k/4N3/7K/4N3/8/8/b7/8 w - - 0 5
>>> The mating move is N5g6#. By the way this position arise from a nice
>>> problem with FEN: 6bk/8/3P2K1/4N3/8/8/2r5/1N6 w - - 0 1
>>>
>>>I run crafty on a Windows 95 with EGTB, ROCK opening book and 24Mb (5Mb) hash.
>>>
>>>Best regards
>>>Andreas Stabel
>>
>>4) Something like
>> setboard 8/2B2pPb/7k/4K3/3p2P1/8/8/8 w
>> d
>> search g8=N+
>> move
>>will not work. Crafty says: Illegal move (ambiguous): g8
>>
You did'nt comment on this!
>>5) setboard 4k3/nnnnnnnn/8/8/8/8/RRRRRRRR/4K3 w
>> move
>>will crash Crafty.
>>
>
>
>
>I can't reproduce this. There are no "piece limits" in crafty, and setting
>this position simply produced a funny-looking position. Typing "go"
>produced Rxh7 with an eval of +25 with no problems...:
>Crafty v15.19
>
I have this problem with crafty running NT4.0 and AIX2.2. In both cases
crafty crashes running version 15.18.
>
>
>>Personally I find 3) the "insufficint material feature" quite annoying
>>and would be happier whithout it.
>
>
>I disagree. I think that after playing one game with something like KNNP
>vs KB or KP, and seeing it allow the opponent to rip the pawn for its last
>piece (the bishop or pawn) that you'd not like removing this, because it
>wouldn't know to protect that pawn at all costs to keep winning chances
>alive...
>
>This from *lots* of experience on the chess servers, which is why this was
>added, of course...
>
>As I said, it is wrong so rarely as to not matter. It is right enough that
>it is very useful...
>
It's not rarely to me.
Here a position without knights.
White(1): White(1):
+---+---+---+---+---+---+---+---+
8 | *K| | K | | | | B | |
+---+---+---+---+---+---+---+---+
7 | *B| | | | | | | |
+---+---+---+---+---+---+---+---+
6 | | | | | | | | |
+---+---+---+---+---+---+---+---+
5 | | | | | | | | |
+---+---+---+---+---+---+---+---+
4 | | | | | | | | |
+---+---+---+---+---+---+---+---+
3 | | | | | | | | |
+---+---+---+---+---+---+---+---+
2 | | | | | | | | |
+---+---+---+---+---+---+---+---+
1 | | | | | | | | |
+---+---+---+---+---+---+---+---+
a b c d e f g h
White(1): end-game phase
clearing hash tables
time surplus 0.00 time limit 5:00 (5:00)
depth time score variation (1)
starting thread 1
time: 0.03 cpu:6166% mat:0 n:600 nps:10000
ext-> checks:60 recaps:0 pawns:0 1rep:0
predicted:0 nodes:600 evals:1
endgame tablebase-> probes done: 0 successful: 0
hashing-> trans/ref:0% pawn:0% used:w0% b0%
White(1): Bh7
time used: 0.03
learning position, wtm=1 value=-66
game is a draw due to insufficient material.
Do we really have to pay the price?
Kind regards
Bernhard
>>
>>Kind regards
>>Bernhard
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