Author: leonid
Date: 06:47:21 09/14/02
Go up one level in this thread
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. Selective in 11 moves was solved in 18 seconds. Usual setting. Cheers, Leonid. >>Groetjes, >>Paul
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