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Subject: Re: Playing the NPS game

Author: Ren Wu

Date: 17:57:53 09/26/01

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Here is Initiative's log, two pos ecm 1582 and ecm 1527, searched up to 8 plies.

     383.008  16.0      383.008  16.0  1809781 _Attacking (rcgen.obj)
     269.220  11.2      269.220  11.2   169580 _GenCapMove (rcgen.obj)
     256.254  10.7     2220.588  92.6   967692 _NegaScout (rcsech.obj)
     226.982   9.5      226.982   9.5   967693 _HashTableLookup (rchash.obj)
     213.103   8.9      213.103   8.9  1719790 _Update (rceng.obj)
     206.721   8.6      206.721   8.6   849079 _NextMove (rcsech.obj)
     177.683   7.4      189.571   7.9    78714 _GenAllMove (rcgen.obj)
     117.972   4.9      117.972   4.9        2 _HashTableClear (rchash.obj)
      80.751   3.4       86.419   3.6    42184 _ScorePawn (rceva.obj)
      74.670   3.1      435.134  18.1    78714 _SEMoveGen (rcsech.obj)
      74.464   3.1      209.035   8.7   782713 _RCEngScore (rcsech.obj)
      53.791   2.2       53.791   2.2  1719790 _Dndate (rceng.obj)
      48.165   2.0      134.571   5.6   782715 _EvaPawnStruc (rceva.obj)
      40.769   1.7      469.323  19.6   227145 _CapSech (rcsech.obj)

Compare this with yours, from first few lines, things looks ok. However, i saw
this from yours

[6]     66.5    0.43   21.46 1642284+928083  qsearch [6]
                5.26    4.70 2570367/2570368     opn_eval [7]
                2.48    3.01 1613239/2066384     gen [8]
                1.03    3.94 1584298/2036996     order_moves [9]

is this quiese search routine? it tells me that it took about 2/3 of the time, i
think this is a problem, which position are you using here?

Mine only took 20% of the total time, and i don't use SEE, and so in theory I
will search more capture nodes than you. Maybe your pruning code at quiese
search borken, and so you end up search more nodes there, and because you use
SEE, those nodes are expensive to search.

try to get rid hash probe at capture, and use MVV/LVA to sort moves and see if
helps.

I am not sure if this help in anyway, good luck.

btw mine get about 500K nps on a PIII-733. So I think yours can be speed up
quite a bit.

Ren.




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