Author: Jeremiah Penery
Date: 20:18:42 03/07/99
Go up one level in this thread
On March 07, 1999 at 20:16:01, Andrew Dados wrote:
>
>On March 07, 1999 at 19:04:51, James T. Walker wrote:
>
>>On March 07, 1999 at 18:26:33, James T. Walker wrote:
>>
>>>On March 07, 1999 at 16:27:37, blass uri wrote:
>>>
>>>>I found that all Fritz's versions are often wrong in the number of moves when
>>>>they see mate.
>>>>
>>>>I think that not telling the number of moves for mate is better than displaying
>>>>wrong information.
>>>>
>>>>Fritz does not know to count distance to mate and if chessbase cannot fix it or
>>>>prefer not to fix it then they should give evaluation of # without a number
>>>>after the #
>>>>
>>>>Uri
>>>Hello Uri,
>>>Yes and Nimzo 99a does the same thing. I have mentioned this and several other
>>>problems to Chessbase but to no avail. I'm not sure they pass these problems
>>>along to the programmers since I beleive that the programmers would want to fix
>>>these problems if they are aware of them.
>>>Jim Walker
>>
>>By the way Uri, why do you only mention Fritz when Junior also has this
>>problem?
>>Jim
>
> Doh.. Rebel, Crafty, Genius etc do the same... all programs do that because
>they extend along forced lines... so 'quiet' mates may be shorter, but not
>found. Nothing you can do about it unless you turn all pruning/extensions etc
>off.
> Try those positions from Rebel8 winners of quiz for 'mate in 15 in less
>nodes'... at least 4 of them are in less then 15 moves (pos. 2,3,4 and 10). How
>many your favourite program solves correct?
>
>K6k/2r1p1p1/3pPpP1/1q1P1P2/8/ppp5/bbnnn3/QRRRRRR1 w - - id=Bert v/d AkkerRh1+
>nodes=401; bm=g1h1;
Mate in 15 found.
>nk1b4/2pPp3/1pPpPp2/1P1P1p2/5p2/5PpK/6P1/8 w - - id=John Graham - Kh4 nodes=576; bm=h3h4;
Crafty found mate in 16, but found the mate in 13 after Kh4 was made.
>7k/5K2/3p3p/3PP2P/8/5Pp1/5P2/8 w - - id=Marc Smet - e6 nodes=707; bm=e5e6;
This is a mate in 5 with a different best move: fxg3 dxe5 d6 e4 d7 exf3 d8=Q+
Kh7 Qg8#
>8/Bb3b2/pP1P1P2/2Qb3p/1P1K1P2/8/bP1B1Pb1/B1rkr3 w - - id=David McMullen -Qxc1+
>nodes=171; bm=c5c1;
Mate in 8 found.
>b3k1rq/6p1/3pP2p/4pP1P/Pp2n2p/1PQ3pP/2Pb1pP1/1r3n1K w - - id=Bart Lohmann-Qc8+
>nodes=188; bm=c3c8;
Mate in 15 found.
>B4nk1/1pppnpq1/5B1p/4P1RP/4P1P1/2PKP3/3PP3/8 w - - id=Rudy Bloemhard - Rxg7+
>nodes=394; bm=g5g7;
Mate in 14 found.
>5b1k/p3p1p1/P2pP1P1/P1pP2P1/2p5/2p1p3/2P1P3/4K3 w - - id=Roatta - Kd1 >nodes=761; bm=e1d1;
Mate in 15 found.
>k1b5/1p1p4/1P1P1p2/3PpP2/4Pp2/1p1p1p2/1P1P1P2/2K5 w - - id=Peter de Rooij- Kd1
>nodes=836; bm=c1d1;
Mate in 15 found.
>3b2kb/2pPp1p1/2p1P1P1/2p1P3/2p5/2P1p1p1/2P1P1P1/5KrB w - - id=Stephan
>Brandenburg - Kxg1 nodes=859; bm=f1g1;
Mate in 15 found.
>kr6/2K5/p7/P7/6PQ/8/8/8 w - - id=Meikel Weber - Qh1+ nodes=489;
Mate in 10 found with the move Qd8: Qd8 Rxd8 Kxd8, then it's a tablebase
position.
>and one testposition of mine: mate in ???:
>7Q/5p1p/5P1p/5P1p/5P1P/5P1p/5P1p/5K1k w - - bm=Kf1-e2
Crafty finds Mate in 9:
8-> 0.13 Mat09 1. Ke2 Kg1 2. Qg7+ Kh1 3. Qxf7 Kg1
4. Qg7+ Kh1 5. Qxh6 Kg2 6. Qg7+ Kh1
7. f7 h6 8. Qa1+ Kg2 9. Qf1#
>-Andrew-
I think, however, that this isn't what Uri was talking about. I believe he was
referring to the cases where a program says "Mate in 8" (for example), then
after the opponent's move it announces "Mate in 10", and the mate scores jump
around for a few moves until finally it gets the correct number. I've seen it
happen with most programs, and it bugs me too. :)
Jeremiah
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