Author: Howard Exner
Date: 20:44:06 01/21/01
Go up one level in this thread
On January 21, 2001 at 22:47:29, Jeff Lischer wrote:
>Ed,
>
>What is going on with this position?!? If I just give the position to Century,
>it never considers Rg8. It finds O-O quite early (ply 5) and stays with it. If I
>play through the moves of the game having Century analyze as it goes, it never
>finds O-O. Instead it gives the log file above. Does this have something to do
>with the hash table usage? I was using the default settings with 60 Mb hash
>table.
Same result here. When just loading the game epd with no game history, I get
this on an Athlon 900.
Nothing but O-O from zero seconds up to over 6 minutes, when I stopped the
analysis.
Thinking....
+---+---+---+---+---+---+---+---+ RC3D6.EPD - Pos 1
8 | *R| | | | *K| | | *R|
+---+---+---+---+---+---+---+---+ 00:00:00 00:00:00
7 | *p| *Q| | *p| *p| *p| *B| *p|
+---+---+---+---+---+---+---+---+
6 | | *p| *N| | | *N| *p| | Time infinite
+---+---+---+---+---+---+---+---+ Hash 60 Mb
5 | | | | | | | | | Engine Rebel Century 3.0
+---+---+---+---+---+---+---+---+ Personality Rebel Century 3
4 | | | p | | | | | | anti-GM Off
+---+---+---+---+---+---+---+---+ Tactics Off
3 | | p | N | | | N | p | | Bluff Chess Off
+---+---+---+---+---+---+---+---+ Style Normal
2 | p | B | | | p | p | K | p | Strength Strongest
+---+---+---+---+---+---+---+---+ Search Normal Search
1 | R | | | Q | | R | | |
+---+---+---+---+---+---+---+---+
a b c d e f g h
r3k2r/pq1pppbp/1pn2np1/8/2P5/1PN2NP1/PB2PPKP/R2Q1R2 b kq -
[Event "?"]
[Site "?"]
[Date "??.??.????"]
[Round "?"]
[White "Pos 1"]
[Black "RC3125D6.EPD"]
[Result "*"]
[WhiteElo "?"]
[BlackElo "?"]
[FEN "r3k2r/pq1pppbp/1pn2np1/8/2P5/1PN2NP1/PB2PPKP/R2Q1R2 b kq - 0 1"]
1..*
00:00:00 1.00 -0.11 1..O-O
00:00:00 1.05 -0.11 1..Ne4 2.Nxe4 Bxb2
00:00:00 1.06 -0.10 1..d6
00:00:00 1.09 0.02 1..Ne5
00:00:00 2.00 -0.14 1..Ne5 2.Nd5 Nxd5 3.Qxd5
00:00:00 2.01 -0.12 1..d6 2.e3
00:00:00 2.02 -0.11 1..Ne4 2.Nxe4 Bxb2
00:00:00 3.00 -0.11 1..Ne4 2.Nxe4 Bxb2
00:00:00 3.01 -0.09 1..d6 2.Nd5 Nxd5 3.Bxg7
00:00:00 3.02 -0.02 1..Ne5 2.Kg1 Ne4 3.Nxe4
00:00:00 4.00 -0.02 1..Ne5 2.Kg1 Ne4 3.Nxe4 Nxf3
00:00:00 5.00 -0.14 1..Ne5 2.Nd5 Nxf3 3.Bxf6 Ne1 4.Kg1
00:00:00 5.01 -0.02 1..Ne4 2.Nxe4 Bxb2 3.Rb1 Bg7
00:00:00 6.00 -0.09 1..Ne4 2.Nxe4 Bxb2 3.Rb1 Bg7 4.Qd6
00:00:00 6.03 -0.05 1..O-O 2.Qd2 d6 3.Rad1 Rac8 4.e3
00:00:01 7.00 -0.01 1..O-O 2.Qd2 Ne5 3.Nd5 Nxd5 4.Qxd5
Qxd5 5.cxd5 Nxf3 6.Bxg7 (0)
00:00:02 8.00 -0.01 1..O-O 2.Qd2 Ne5 3.Nd5 Nxd5 4.Qxd5
Qxd5 5.cxd5 Nxf3 6.Bxg7 Kxg7 (1)
00:00:05 9.00 -0.01 1..O-O 2.Qd2 Ne5 3.Rad1 Rab8 4.Qf4
Nh5 5.Qh4 (3)
00:00:13 10.00 -0.02 1..O-O 2.Qd2 d6 3.Rad1 Rac8 4.e4
Qd7 5.e5 Ne8 6.exd6 Nxd6 (7)
00:00:41 11.00 -0.01 1..O-O 2.Qd2 Ne5 3.Rad1 d6 4.Nd5
Nxd5 5.cxd5 Rac8 6.Nxe5 Bxe5 7.Bxe5 (22)
00:01:59 12.00 -0.02 1..O-O 2.Nd5 Nxd5 3.Bxg7 Nf4 4.gxf4
Kxg7 5.Qd5 d6 6.Ng5 (66)
Positions : 148.594.689
Nodes per second : 398.377
Extensions (checks) : 1.875.978 (1%)
Extensions (captures) : 1.783.255 (1%)
Extensions (king safety) : 16.651 (0%)
Extensions (on depth) : 0 (0%)
Extensions (remaining) : 31.330 (0%)
Extensions (total) : 3.707.214 (2%)
Hash Table : 1.015.881 1.083.909 (99%)
Average depth : 13
Deepest depth : 35
I'll try playing the moves through with the game history and see if the quirky
Rg8 rears its ugly head.
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