Author: William Penn
Date: 00:05:23 12/24/05
Go up one level in this thread
Vas,
Sorry, "hanging" or "hung" was a poor choice of words. (I was a little bit
despondent when I wrote that.) What that implies did not happen. The engine and
GUI were still fully functional and active. There was no problem with the
various operations.
What I meant to say was that nothing further appeared in the analysis display
window after about 9 minutes. The engine was still active. It just wasn't
providing any more PV outputs at greater depths. Possibly it would have, if I
had let it go for a longer time, but I doubt it.
Actually in this position, there is no doubt that the best move was already
selected after 9 minutes. The game is almost over, a quick win. In that case it
looks like Rybka simply decided there is no purpose for further analysis. So it
is not necessarily a bad behavior, it is just different compared to how other
engines behave. Naturally we would like to see the analysis and PV outputs
continue, but that's not essential if Rybka's primary objective is simply to win
the game.
---------
I just ran the following long analysis in infinite mode which shows something
different. The nodes and nodes/second numbers are behaving strangely after level
20.01. It looks like the nodes counter is recycling to zero after about
500,000,000 nodes by my estimate. We used to see something similar in the older
CB engines. Easy to fix, they just had to make their counter able to count to
bigger numbers. I would guess this happened because it looks like you tripled
those output numbers for cosmetic reasons... :)
(game#243)
[D]5qrk/pp1r3p/n1p2p2/P1p1pNp1/4P2P/1P1PQ1P1/2P2PK1/R6R w - -
Engine: Rybka 1.01 Preview 2 32-bit (704 MB) by Vasik Rajlich
(run 3-PV for a few minutes)
15 2:36 +1.31 33.hxg5 Rxg5 34.Qf3 Nc7 35.Rh5 Ne6
36.Rxg5 fxg5 37.Rh1 Qe8 38.Qd1 b6
39.axb6 (16.943.250) 110
15 3:18 +1.06 33.Ra4 g4 34.Rc4 h5 35.Rd1 Rg6
36.Ra1 Kg8 37.Kh2 Qe8 38.f3 gxf3 (21.431.195) 110
15 2:59 +1.03 33.Qd2 Nc7 34.hxg5 Rxg5 35.Qc3 Nb5
36.Qc4 Nd4 37.Rh4 Nxf5 38.exf5 Qd6
39.Qe6 Qd5+ (19.457.399) 110
(then reduce to 1 PV)
11.01 0:01 +1.32 33.hxg5 Rxg5 34.Qf3 Nc7 35.Rh5 Ne6
36.Rxg5 fxg5 37.Rh1 Ng7 38.Qg4 Ne6
39.Rh6 Qe8 (195.954) 111
12.01 0:02 +1.33 33.hxg5 Rxg5 34.Qf3 Nc7 35.Rh5 Ne6
36.Rxg5 fxg5 37.Rh1 Ng7 38.Qg4 Ne6
39.Rh6 Qe8 (267.392) 110
13.01 0:04 +1.28 33.hxg5 Rxg5 34.Qf3 Nc7 35.Rh5 Ne6
36.Rxg5 fxg5 37.Rh1 Ng7 38.Qg4 Ne6
39.Rh6 Qe8 (513.071) 108
14.01 0:12 +1.30 33.hxg5 Rxg5 34.Qf3 Nc7 35.Rh5 Ne6
36.Rxg5 fxg5 37.Rh1 Ng7 38.Qg4 Ne6
39.Rh6 Qe8 (1.386.246) 110
15.01 0:24 +1.22 33.hxg5 Rxg5 34.Qf3 Nc7 35.Rh5 Ne6
36.Rxg5 fxg5 37.Rh1 Ng7 38.Qg4 Ne6
39.Rh6 Qe8 (2.608.983) 110
16.01 1:29 +1.30 33.hxg5 Rxg5 34.Qf3 Rg6 35.Rh5 Kg8
36.Nh4 Rgg7 37.Rh6 Nb4 38.Rxf6 Qd8
39.Rc1 (9.846.132) 113
17.01 5:49 +1.23 33.hxg5 Rxg5 34.Qf3 Nc7 35.Rh5 Rxh5
36.Qxh5 Ne6 37.a6 b6 38.Rh1 Qg8
39.Qh6 Qg5 (38.723.297) 113
18.01 12:09 +1.18 33.hxg5 Rxg5 34.Qf3 Nc7 35.Rh5 Qg8
36.Rh6 Qf8 37.Rah1 Ne6 38.Kg1 Kg8
39.R1h4 Qd8 (81.225.326) 114
19.01 26:31 +1.14 33.hxg5 Rxg5 34.Qf3 Nc7 35.Rh5 Qg8
36.Rh6 Qf8 37.Rah1 Ne6 38.R1h4 Kg8
39.Kg1 Qd8 (178.202.522) 114
20.01 46:03 +1.26 33.hxg5 Rxg5 34.Qf3 Nc7 35.Rh5 Qg8
36.Rh6 Qf8 37.Rah1 Ne6 38.R1h4 Kg8
39.Kg1 Qd8 (309.766.912) 114
21.01 84:55 +1.22 33.hxg5 Rxg5 34.Qf3 Nc7 35.Rh5 Qg8
36.Rh6 Qf8 37.Rah1 Ne6 38.R1h4 b6
39.Qd1 b5 (35.438.207) 7
22.01 184:10 +1.20 33.hxg5 Rxg5 34.Qf3 Nc7 35.Rh5 (188.955.970) 17
23.01 554:16 +1.19 33.hxg5 Rxg5 34.Rad1 (46.840.269) 1
WP
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