Author: Miguel A. Ballicora
Date: 16:47:03 12/11/01
Go up one level in this thread
On December 11, 2001 at 18:31:14, Andrew Williams wrote:
>On December 11, 2001 at 10:59:55, Will Singleton wrote:
>
>>[D]4k2r/1nrqbppp/p3b3/1pppP1NQ/8/1NP1B2P/PP3PP1/R4RK1 w k - 0 1
>>
>>Most programs don't immediately see that Nxh7 puts the knight in a bad spot.
>>Can this problem be addressed by root analysis?
>>
>>(Beowulf might be doing something like that, since it never considers Nxh7.)
>>
>>Will
>
>PM doesn't do any root analysis or anything like that. It loses interest
>in Nxh7 after 17 seconds on my Athlon 1200. Too long to avoid it in ICC
>blitz games, I fear.
>
>
>Andrew
It is very interesting how different engines have different personalities.
Gaviota does not consider Nxh7 from the beginning. It only considers it briefly
at ply 8 and abandon the idea immediately. If you ask me why does not consider
that... I have no idea because I have no special code for it. It must be
mobility. Probably mobility of the queen (that has to remain tied)
Regards,
Miguel
PIII 800 mhz:
+-----------------+
| . . . . k . . r |
| . n r q b x x x |
| x . . . b . . . |
| . x x x o . N Q |
| . . . . . . . . |
| . N o . B . . o |
| o o . . . o o . |
| R . . . . R K . |
+-----------------+
analyze
103 1: 0.0 +1.33 Qh5-e2
1455 2 0.0 :-(
2233 2: 0.0 +0.84 f2-f4 h7-h6
4590 3: 0.1 +0.93 Qh5-e2 Be6-f5 h3-h4 Be7xg5
Be3xg5
15380 4: 0.2 +0.71 Qh5-e2 Be6-f5 h3-h4 o-o
20608 5 0.3 +0.70 Qh5-e2 Be6-f5 g2-g4 Be7xg5
Be3xg5 h7-h6
23960 5 0.3 +0.71 h3-h4 h7-h6 Ng5xe6 Qd7xe6
Ra1-d1
34868 5 0.4 +0.79 Ra1-c1 h7-h6 Ng5xe6 Qd7xe6
Rc1-d1
42410 5 0.5 +0.87 Kg1-h2 h7-h6 Ng5xe6 Qd7xe6
Ra1-d1
47911 5 0.6 +0.88 Be3-f4 Be7xg5 Bf4xg5 d5-d4
Qh5-e2 d4xc3 b2xc3
57628 5: 0.7 +0.88 Be3-f4 Be7xg5 Bf4xg5 d5-d4
Qh5-e2 d4xc3 b2xc3
66097 6 0.8 +0.54 Be3-f4 Be7xg5 Bf4xg5 Be6-f5
Qh5-e2 o-o
75803 6 0.9 +0.61 Kg1-h2 Be7xg5 Be3xg5 Be6-f5
Qh5-e2 o-o <EMPTY> <-transp
89201 6 1.0 +0.62 Qh5-e2 Be6-f5 g2-g4 Be7xg5
Be3xg5 h7-h6 Bg5xh6 Rh8xh6
g4xf5 Qd7xf5
104838 6 1.2 +0.74 f2-f4 Be7xg5 Qh5xg5 g7-g6
Qg5-h4 Be6-f5
132654 6: 1.5 +0.74 f2-f4 Be7xg5 Qh5xg5 g7-g6
Qg5-h4 Be6-f5
199952 7 2.3 +0.89 f2-f4 h7-h6 Ng5xe6 Qd7xe6
Qh5-f3 c5-c4 Nb3-d4
311088 7: 3.4 +0.89 f2-f4 h7-h6 Ng5xe6 Qd7xe6
Qh5-f3 c5-c4 Nb3-d4
386190 8 4.1 +0.68 f2-f4 Be7xg5 Qh5xg5 g7-g6
g2-g4 Qd7-c6 f4-f5 h7-h6
835330 8 9.0 +0.84 Ng5xh7 g7-g6 Qh5-h6 d5-d4
Qh6-g7 Rh8xh7 Qg7xh7 d4xe3
f2xe3
886672 8: 9.4 +0.84 Ng5xh7 g7-g6 Qh5-h6 d5-d4
Qh6-g7 Rh8xh7 Qg7xh7 d4xe3
f2xe3
1399397 9 14.9 +0.52 Ng5xh7 Ke8-d8 Be3-g5 Kd8-c8
Bg5xe7 Qd7xe7 Ra1-d1 Kc8-b8
Rd1-d3
1636668 9 17.4 +0.80 f2-f4 Be7xg5 Qh5xg5 g7-g6
Qg5-h4 o-o Qh4-f2 c5-c4
Nb3-c5
2603848 9: 27.1 +0.80 f2-f4 Be7xg5 Qh5xg5 g7-g6
Qg5-h4 o-o Qh4-f2 c5-c4
Nb3-c5
3608298 10 37.7 +0.82 f2-f4 Be7xg5 Qh5xg5 g7-g6
g2-g4 d5-d4 c3xd4 Be6-c4
d4xc5 Bc4xf1 Ra1xf1
5105261 10: 52.0 +0.82 f2-f4 Be7xg5 Qh5xg5 g7-g6
g2-g4 d5-d4 c3xd4 Be6-c4
d4xc5 Bc4xf1 Ra1xf1
8118700 11 84.2 +0.68 f2-f4 g7-g6 Qh5-h6 Be7-f8
Qh6-h4 Bf8-e7 Ra1-d1 Be7xg5
f4xg5 c5-c4 Nb3-d4
This page took 0 seconds to execute
Last modified: Thu, 15 Apr 21 08:11:13 -0700
Current Computer Chess Club Forums at Talkchess. This site by Sean Mintz.