Author: Robert Hyatt
Date: 08:39:56 09/08/04
Go up one level in this thread
On September 07, 2004 at 22:27:56, Albert Silver wrote:
>On September 07, 2004 at 22:26:26, Jeremiah Penery wrote:
>
>>On September 07, 2004 at 19:32:43, Robert Hyatt wrote:
>>
>>>On September 07, 2004 at 16:46:03, Albert Silver wrote:
>>>
>>>>Using the new switch [Time Control = 125] and [Time Control Status = ALWAYS] to
>>>>help Pro Deo use its time better, Pro Deo scored 20.5 - 19.5 in the Nunn 2 set
>>>>against Ruffian 1.05. It had previously lost, though I must admit I don't
>>>>remember the score.
>>>>
>>>>I then tested my new settings and it too scored 20.5 - 19.5. It squandered a
>>>>number of winning positions, which was probably due to the time control, but
>>>>most annoying of all, was to see it lose a very basic opposite colored bishop
>>>>ending despite being a pawn up! This was in the last game. It played a terrible
>>>>blunder and managed to lose. I checked to see whether this was due to my own
>>>>settings, but Pro Deo default also plays this move and needs 3 minutes 34
>>>>seconds to find the right move. Still, to be fair, even Junior 8 takes over 2
>>>>minutes to see this, whereas Shredder 7.04 takes a mere 6 seconds. It's one of
>>>>those issues where 2 distant passed pawns overcome the bishop.
>>>>
>>>>How does your engine do? Make sure it thinks long enough to consider the
>>>>maneuver Kf5 bringing around the king.
>>>
>>>I let Crafty run for 10+ minutes. It liked Bc2 with a score of 0.0 instantly,
>>>and never wavered from that move through 10+ minutes on my dual 2.8ghz xeon...
>>
>>If you tell Crafty to search Kf5, does it also see a drawscore?
>
>Good question. How long does it take to see that Kf5 loses?
>
> Albert
Searching with 6 piece endgame tables, it seems that Kf5 draws also:
19-> 1:00 -0.01 1. ... Kf5 2. Kxa4 Ke4 3. Bd2 d4 4.
Kb4 c3 5. Bxc3 dxc3 6. Kxc3 <EGTB>
Maybe the error came a move or few later???
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