Author: Heiner Marxen
Date: 14:07:45 01/25/01
Go up one level in this thread
On January 25, 2001 at 16:19:40, leonid wrote: >On January 25, 2001 at 15:24:40, Heiner Marxen wrote: > >>On January 25, 2001 at 11:13:10, leonid wrote: >> >>>On January 25, 2001 at 10:57:06, José Antônio Fabiano Mendes wrote: >>> >>>>On January 25, 2001 at 09:57:29, leonid wrote: >>>> >>>>>Hi! >>>>> >>>>>If you like to solve some average mate position... >>>>> >>>>>[D]R1brkrnR/1N1qqqbN/3qqq1B/1B1bQNbQ/1bn1Q2B/3Q1Q2/3Q1Q2/1K6 w - - >>>>> >>>>>Please indicate your result. >>>>> >>>>>If you can depose here just one forced mate position from some world chess >>>>>championship, it will be nice. Indicate exactly where this competition happened. >>>>>I speak about championship where human found forced mate. Never mind if this >>>>>championship was between two humans or man and machine. It could give an >>>>>opportinity to see which program is best in real life situation. Even more that >>>>>this, it will permit to tune selective search for forced mate to make it more >>>>>effective. >>>>> >>>>>Thanks, >>>>>Leonid. >>>> >>>> As written the second row [1N1qqqb] accounts for only 7 squares, >>>> that's why the diagram is not displayed. JAFM >>> >>>Thanks for indicating mistake! I hope that now it will come in graphics. At list >>>this time I will look if it is really there. >>> >>>Leonid. >> >>According to Chest there is no mate in 8 moves (41.6 min, K7/600 350MB hash). >>What depth is expected for a solution? >> >>Ahem, what exactly is so "average" about this position? > >Hi, Heiner! I saw that this position could be solved with 11 moves or well >below. Paul already said 10 moves as new maximum. You said that in 8, no mate >for sure. Hi Leonid! I estimate 8 hours for depth 9, so I will omit that. I'm currently running Paul's 15 positions. Some appear to be also too deep for Chest. I will report here, when I'm through. >Position was average in my mind since it was not that endless position of 20 or >30 moves deep, like I have seen here already few times. Number of initial legal >moves from each side is moderate. Only white side reach slightly over 100 moves. > Black have only few responses after initiation of hostilities. Ah, I see. But "average"? With that many queens? I consider 100 legal moves to be a huge number... I remember that an early version of Chest was limited to 80 legal moves ;-) Heiner
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