Author: Vincent Diepeveen
Date: 11:00:57 12/30/01
Go up one level in this thread
On December 30, 2001 at 10:57:30, Severi Salminen wrote:
>I just would like to see how other engines do in similar position. So, feed the
>position (1.e4 e5 2.d4 d5) to your engine, perform a 10 ply search and report
>the number of nodes and qnodes. To make sure we count nodes identically, this is
>what I do: I increase nodes if I don't call qsearch() from search() and I
>increase qnodes in the beginning of qsearch(). Like this:
DIEP (not many dangerous extensions turned on 800p3) :
00:30 0 0 1241305 (0) 10 0.490 d4xe5 d5xe4 Qd1xd8 Ke8xd8 Bc1-f4 Ng8-e7
Nb1-c3 Ne7-g6 Bf4-e3 Nb8-c6 O-O-O Kd8-e8
10 totalnodes = 1739836 ( 0, 0) 41.69 = time needed
Statistics Qsearch totally 1399426 nodes from which 843153 firstply leafs
01:31 0 0 3704999 (0) 11 0.697 d4xe5 d5xe4 Qd1xd8 Ke8xd8 Nb1-c3 Nb8-d7
Bc1-f4 Ng8-e7 O-O-O Ne7-g6 Ng1-h3 Ng6xf4 Nh3xf4
11 4576314 ( 0, 0) 112.06
Statistics Qsearch totally 3724322 nodes from which 2201651 firstply leafs
03:13 0 0 7855534 (0) 12 0.603 d4xe5 d5xe4 Qd1xd8 Ke8xd8 Nb1-c3 Nb8-c6
Bc1-f4 Bc8-f5 Bf1-c4 Kd8-e8 e5-e6 Bf5xe6 Bc4xe6 f7xe6 Bf4xc7
12 10574733 ( 0, 0) 261.09
Statistics Qsearch totally 8546273 nodes from which 4925054 firstply leafs
So for 10 ply that was:
total nodes = 1739836
qsearch total = 1399426
qsearch firstply = 843153
That means that in
total 1399426 - 843153 = 556273 nodes in qsearch after ply1
Which means that the total moves tried in qsearch as % from total
nodes => 556273 * 100% / 1399426 = 40%
>search()
>{
> if(depth<=0)
> qsearch()
> nodes++;
>.
>.
>}
>
>qsearch()
>{
> qnodes++;
>.
>.
>}
>
>Try to get similar counting scheme so figures are comparable. Here is the
>position:
>[d] rnbqkbnr/ppp2ppp/8/3pp3/3PP3/8/PPP2PPP/RNBQKBNR w KQkq - 0 1
>
>And please tell if you use SEE or not. I'll post my results soon also.
>
>Severi
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