Author: Paul
Date: 07:14:52 09/14/02
Go up one level in this thread
On September 14, 2002 at 09:47:21, leonid wrote: >On September 14, 2002 at 09:26:25, leonid wrote: > >>On September 14, 2002 at 08:51:31, Paul wrote: >> >>>On September 14, 2002 at 07:55:35, leonid wrote: >>> >>>>Hi, >>>> >>>>This mate is easy and only 9 moves deep: >>>> >>>>[D]bqRNNkqr/Q7/qPnPqBqN/Q4q2/5Qr1/5q2/5nQ1/bQqQqBKR w - - >>> >>>Hi Leonid, >>> >>>Pretz (p3/1000) also finds this one easy, it gets this in 3 seconds: >>> >>>00:03 WM9 06 Nxe6+ Qgxe6 Be7+ Nxe7 dxe7+ Qxe7 Qaxf5+ Bf6 Nxf6+ Qaxc8 Nh7+ Ke8 >>>Qxg6+ Rxg6 Qgxg6+ Qf7 Qaxf7# >>> >>>>Still, maybe, You will be tempted for something more heavy and I this way will >>>>be able to find more on this position: >>>> >>>>[D]2qRQq2/p6P/q1BqqR1N/r6B/n1QNQQ1B/r6k/b1QKNP1q/bq4qn w - - >>>> >>>>On description of this mate I can see that it was solved by selective in 13 >>>>moves but brute force search went not up to the end in order to find shortest >>>>move. Brute force search, without finding any mate, went only 9 moves deep. >>> >>>This one was indeed a lot more difficult, mine didn't fare so well here: >>> >>>06:49 WM11 07 Q8xe6+ Qdxe6 Qff3+ Rxf3 Qxf3+ Kxh4 Nhf5+ Rxf5 Nxf5+ ... >>> >>>So it found a mate in 11 in almost 7 minutes, with an incomplete pv ... these >>>d#*&#@rned hashtables ;) ... will have to think about this ... any tips anyone? >>> >>>>Please indicate Your result. >>>> >>>>Thanks, >>>>Leonid. >>> >>>Thanks for your mates as usual ... >> >>Thanks, Paul! >> >>Now I can see that second one is no far then 11 moves. I can even put this >>position at 10 moves by brute force for night. If braching factor will not >>suddenly jump, then it should be enough time for me for finding its depth. >> >>First position have excellent time! >> >>Mine, on usual setting, found mate in 1.75 sec. >> >>Cheers, >>Leonid. > >Paul, just after writing my message, I started to see second position in my file >to indicate 11 moves. When I finally found it (I not indicate before on what >page I had it), I looked that it was in reality solved by selected in 11 moves, >just as You said. Before upper part of page was covered with page keeper and it >is how I missed some additional description. If I knew this yesterday, when I >found this position, I could put search for 10 moves by brute force at night. Hey!! ... so you tricked us ... that's not fair ... I would have found it much faster if I'd known! ... just kiddin' ... :) >Selective in 11 moves was solved in 18 seconds. Usual setting. Not bad at all ... you really should implement hash to get a bit faster though ... ;) >Cheers, >Leonid. Groetjes, Paul
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