Author: Robert Hyatt
Date: 07:02:40 08/24/98
Go up one level in this thread
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
>
>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
pondering disabled.
White(1): setb 4k3/nnnnnnnn/8/8/8/8/RRRRRRRR/4K3 w
White(1): d
+---+---+---+---+---+---+---+---+
8 | | | | | *K| | | |
+---+---+---+---+---+---+---+---+
7 | *N| *N| *N| *N| *N| *N| *N| *N|
+---+---+---+---+---+---+---+---+
6 | | | | | | | | |
+---+---+---+---+---+---+---+---+
5 | | | | | | | | |
+---+---+---+---+---+---+---+---+
4 | | | | | | | | |
+---+---+---+---+---+---+---+---+
3 | | | | | | | | |
+---+---+---+---+---+---+---+---+
2 | R | R | R | R | R | R | R | R |
+---+---+---+---+---+---+---+---+
1 | | | | | K | | | |
+---+---+---+---+---+---+---+---+
a b c d e f g h
White(1): go
clearing hash tables
time surplus 0.00 time limit 30.00 (3:00)
depth time score variation (1)
4 0.27 24.69 1. Rxh7 Nbd8 2. Rgxg7 Nac6 3. Rgxf7
Nxf7 4. Rfxf7
4-> 0.35 24.69 1. Rxh7 Nbd8 2. Rgxg7 Nac6 3. Rgxf7
Nxf7 4. Rfxf7
5 0.41 -- 1. Rxh7
5 0.50 24.70 1. Rxh7 Nab5 2. Rgxg7 Nb7d6 3. Rgxf7
Nxf7 4. Rfxf7
5 0.93 41/49 1. Rf5
>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...
>
>Kind regards
>Bernhard
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