Author: leonid
Date: 04:01:23 08/17/01
Go up one level in this thread
On August 16, 2001 at 22:23:32, Heiner Marxen wrote: >On August 16, 2001 at 21:21:22, leonid wrote: > >>On August 16, 2001 at 19:49:56, Heiner Marxen wrote: >> >>>On August 16, 2001 at 19:00:56, Uri Blass wrote: >>> >>>>On August 16, 2001 at 18:58:17, Uri Blass wrote: >>>> >>>>>On August 16, 2001 at 16:47:03, Heiner Marxen wrote: >>>>> >>>>>>On August 16, 2001 at 12:03:51, leonid wrote: >>>>>> >>>>>>>Hi! >>>>>>> >>>>>>>This position is intended to be solvable by every program, after only minor >>>>>>>resistance. >>>>>>> >>>>>>>1rrbbq2/3k4/1qqpnq2/3B4/2NPR3/1QB1KQ2/QN3PQQ/Q5QR w - - >>>>>>> >>>>>>>Please indicate your result. >>>>>>> >>>>>>>Thanks, >>>>>>>Leonid. >>>>>> >>>>>>Hello Leonid! >>>>>> >>>>>>You should try to find titles for your beautiful creations! >>>>>>For this one I suggest "The King", for obvious reasons :-) >>>>>> >>>>>>I've not yet worked on this new creation of yours, since my K7/600 after >>>>>>60 hours is still busy crunching on your corrected "US". >>>>>>http://www.icdchess.com/forums/1/message.shtml?183489 >>>[D]B2B1qr1/N2Qb2q/Q2Rq3/Q2Q1q2/Q2Q2q1/Q2Q3n/R2Qq2k/1KN2rq1 w - - >>>>>>I know, you warned us :-) but I thought that would not apply to Chest. >>>>>>That there is no mate in 8 needed only 40 minutes with an apparent EBF >>>>>>below 10, so I expected less than 10 hours. But this one is a hard nut >>>>>>for Chest. >>>>> >>>>>I understand that chest is working on finding if there is a mate in 9 >>>>>Chessmaster6000(ss=10) can see mate in 12 in 7:20 at depth 1/6(PIII850) >>>>> >>>>>Uri >>>> >>>>It can see even mate in 11 in 16:58 at depth 1/7 >>>>The move is d2-e2 >>>> >>>>Uri >>> >>>Hello Uri! >>> >>>Thanks for the info! >>>I expect Chest to find a mate in 9, here, but I have to wait until it is >>>completely done (64 hours and still busy...). >>>Ah, yes, d2-e2 is one of those moves, where the tree explodes for Chest. >>> >>>We'll see... I will report, of course... until then... >>> >>>Cheers, >>>Heiner >> >>Heiner, from what move exactly branching went up? On mine is started growing >>just from 6. It could be that I just stopped where it must explode. >> >>If you want to glace brute force: >> >>Moves Time Branching factor NPS >> >>4 1.26sec 77k >> 6.65 >>5 8.4 sec 120k >> 6.63 >>6 55.77 124k >> 8.78 >>7 8min 3sec 116k >> 8.17 >>8 1 hour 5 min 48 sec >> >>Cheers, >>Leonid. > >Here is my data: > >depth time EBF[T] EBF[N] ># 1 0.00s 0kN 0.87 1- 0 ># 2 0.00s 0kN 1.00 1- 0 ># 3 0.03s 2kN [ 19.55] 0.96 94- 0 ># 4 0.49s [ 16.33] 26kN [ 12.46] 1.02 1721- 0 ># 5 5.79s [ 11.82] 272kN [ 10.44] 1.14 24491- 0 ># 6 39.83s [ 6.88] 1741kN [ 6.40] 1.40 171448- 0 ># 7 254.16s [ 6.38] 11262kN [ 6.47] 1.70 1091347- 1 ># 8 2375.96s [ 9.35] 109788kN [ 9.75] 1.93 9380661- 1310495 > >First, it went down, nicely, but then it started climbing somewhat, >and the next one is at least 88 ! Uuh. >Its still running, over 66 hours already. This is the next position that indicate that my specialized plys are still not that efficent. When your solve 4 moves in only one half of one second, mine went beyond one. My NPS is double of your. This is the next indication that efficency is below of what it should be. My expectation is that hash do very little for specialized plys since they are already very optimized. Something to verify later. For me is there no chances to look 9 moves for more that 10 hours but still I am curious how much internal structure of given position influence its branching factor. Will try to put this position later for 10 hours run. Maybe it will be interesting for you to know exactly time for other and good programs for this position. First for certain program where I put hash to zero. 3 moves took 4 seconds. 4 moves took 7 min and 31 sec. Second was specialized engin for solving mate. It not permit to disconnect its hash completely. Could see only for 4 moves. It took 1 min and 18 sec. Five moves time I could not see since mate engin exploded. Cheers, Leonid. >Cheers, >Heiner
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