Author: Albert Silver
Date: 11:05:23 09/02/04
Go up one level in this thread
On September 02, 2004 at 03:43:50, Vincent Lejeune wrote:
>On September 01, 2004 at 19:53:53, stuart taylor wrote:
>>
>>I would be very interested in the "more later", if possible. Maybe the computers
>>which get h4 quick sometimes change their mind, and then come back again to h4
>>with much more certainty. I've seen that happen from this position.
>
>I'll let Chessmaster think on it next night (reponse in 24 from now)
>I'm reposting all the test positions, with comments :
>
>find h4! and don't lose it after 15 min
>[d]2kr3r/ppp1qpp1/2p5/2b2b1p/2P1pPn1/1P2P1PP/PBQPB3/RN2K2R b KQ - 0 12
Pro Deo finds h4! quite quickly and judging from the eval, I don't see it
changing its mind. (on an Athlon 2400XP+ and 60 MB hash)
Pro Deo default settings:
2...Nf6 3.a3 Qe6 4.b4 Be7 5.Bf1 Kb8 6.Nc3 h4 7.g4
µ (-0.79) Depth: 11 00:00:06 4626kN
2...h4
µ (-0.79) Depth: 11 00:00:10 9042kN
2...h4 3.Bxg4 Bxg4 4.hxg4 hxg3 5.Rg1 g2 6.g5 Rh1 7.Kf2
µ (-1.09) Depth: 11 00:00:14 11522kN
2...h4 3.Bxg4 Bxg4 4.hxg4 hxg3 5.Rg1 g2 6.Rxg2 Rh1+ 7.Ke2 Qh4 8.Nc3 f5 9.Rxh1
µ (-1.11) Depth: 12 00:00:19 15989kN
2...h4 3.hxg4 hxg3 4.Rg1 Qh4 5.Rg2 Bxg4 6.Bf1 Bf3 7.Bxg7 Bxg2 8.Bxg2 Qh2 9.Bxh8
-+ (-1.58) Depth: 13 00:01:08 60027kN
2...h4 3.Bxg4 Bxg4 4.hxg4 hxg3 5.Rg1
-+ (-1.80) Depth: 14 00:02:19 126429kN
2...h4 3.Bxg4 Bxg4 4.hxg4 hxg3
-+ (-2.86) Depth: 15 00:15:01 830992kN
Pro Deo S&D v.4:
2...Nf6 3.a3 Qd7 4.b4 Be7 5.h4 Bg4 6.Nc3 Qe6 7.0-0-0 Bf3 8.Bxf3 exf3
µ (-0.76) Depth: 11 00:00:08 6371kN
2...h4
µ (-0.76) Depth: 11 00:00:12 10141kN
2...h4 3.Bxg4 Bxg4 4.hxg4 hxg3 5.Rg1 Rh2 6.Kd1 Bxe3 7.Re1
µ (-1.05) Depth: 11 00:00:14 12358kN
2...h4 3.Bxg4 Bxg4 4.hxg4 hxg3 5.Rg1 Rh2 6.Qc3 Qh4 7.Qxg7 g2+ 8.Ke2
µ (-1.35) Depth: 12 00:00:31 26917kN
2...h4 3.hxg4 hxg3 4.Rg1 Qh4 5.Rg2 Qh3 6.Bf1
-+ (-1.70) Depth: 13 00:01:36 86466kN
2...h4 3.hxg4 hxg3 4.Rg1 Qh4 5.Rg2 Qh3 6.Bf1
-+ (-1.95) Depth: 14 00:02:38 153081kN
2...h4 3.hxg4 hxg3 4.Rg1 Qh4
-+ (-2.55) Depth: 15 00:12:25 740521kN
BTW, even though 4...Rh1 doesn't appear in the mainline, once it gets that far
it plays Rh1 in a matter of seconds. I'm only using 60 MB of hash so it may be
an issue.
[D]2kr3r/ppp1qpp1/2p5/2b2b2/2P1pPP1/1P2P1p1/PBQPB3/RN2K2R w KQ - 0 1
Pro Deo Default settings:
4.Rg1 Qh4 5.Rg2 Bxg4 6.Qxe4 Qh1+ 7.Bf1 Rhe8 8.Be5 f5
-+ (-1.94) Depth: 10 00:00:07 5482kN
4.Rg1 Qh4 5.Rg2 Bxg4 6.Bf1 Bf3 7.Bxg7 Bxg2 8.Bxg2 Qh2 9.Kf1 Rh7
-+ (-1.97) Depth: 11 00:00:09 7501kN
4.Rg1 Rh1 5.Rxh1 g2 6.Rg1 Qh4+ 7.Kd1 Qh1 8.Qc3 Qxg1+ 9.Kc2 Qe1 10.gxf5
-+ (-3.81) Depth: 12 00:00:17 15636kN
4.Rg1 Rh1 5.Rxh1 g2 6.Rg1 Qh4+ 7.Kd1 Qh1 8.Qc3 Qxg1+ 9.Kc2
-+ (-3.81) Depth: 13 00:00:54 47595kN
Pro Deo S&D v.4:
4.Rg1 Qh4 5.Kf1 Qh2 6.Rg2 Qh1+ 7.Rg1 g2+ 8.Kf2 Qh4+ 9.Kxg2 Bxg4 10.Bxg4+ Qxg4+
11.Kf1 Qf3+ 12.Ke1 Rh2 13.Nc3 Rdxd2 14.Rxg7
µ (-1.36) Depth: 9 00:00:02 1741kN
4.Rg1 Qh4 5.Rg2 Qh3 6.Bf1 Qxg4 7.Nc3 Qf3 8.Ne2
-+ (-1.55) Depth: 10 00:00:04 2126kN
4.Rg1 Rh1 5.Rxh1 g2 6.Rg1 Qh4+ 7.Kd1 Qh1 8.Re1 Bxg4 9.Kc1
-+ (-3.64) Depth: 11 00:00:05 3832kN
4.Rg1 Rh1 5.Rxh1 g2 6.Rg1 Qh4+ 7.Kd1 Qh1 8.Re1
-+ (-3.64) Depth: 12 00:00:10 8323kN
4.Rg1 Rh1 5.Rxh1 g2 6.Rg1 Qh4+ 7.Kd1 Qh1 8.Qc3 Qxg1+ 9.Kc2
-+ (-3.81) Depth: 13 00:00:19 18051kN
>>and 11....h5, although I doubt very
>>much in a computer ever playing them, even if they are tactically very great.
>find 11...h5
>[d]2kr3r/ppp1qppp/2p5/2b2b2/2P1pPn1/1P2P1P1/PBQPB2P/RN2K2R b KQ - 0 11
Pro Deo also chooses 11...h5 and sticks to it. At least it didn't change its
mind after 10 mins. Note that you don't see 12.h3? in its mainline since you
already know it finds 12...h4! in a matter of seconds, hence it won't consider
12.h3 as the best reply.
Pro Deo default settings:
1...Nf6 2.a3 Qe6 3.b4 Be7 4.Bd4 Bh3 5.Rg1 a6 6.Nc3 h5
³ (-0.36) Depth: 12 00:01:18 67596kN
1...Nf6 2.a3 Qe6 3.b4 Be7
³ (-0.35) Depth: 13 00:01:52 99095kN
1...h5
³ (-0.35) Depth: 13 00:02:02 107273kN
1...h5 2.Bxg7 Rh7 3.Qb2 Qe6 4.b4
³ (-0.52) Depth: 13 00:02:08 112737kN
1...h5 2.Bxg7 Rh7 3.Qb2 Qe6 4.a4 h4
³ (-0.62) Depth: 14 00:03:56 215004kN
1...h5 2.Bxg7 Rh7 3.Qb2 Qe6 4.b4
³ (-0.60) Depth: 15 00:08:04 455220kN
Pro Deo S&D v.4:
1...Nf6 2.a3 Qe6 3.b4 Be7 4.Bd4 h5 5.Nc3 h4 6.0-0-0 hxg3 7.hxg3
³ (-0.36) Depth: 11 00:00:37 31661kN
1...Nf6 2.a3 Qe6 3.b4 Be7 4.Bd4 h5 5.Nc3 h4 6.gxh4 Rxh4 7.0-0-0 Rdh8
³ (-0.42) Depth: 12 00:00:55 47882kN
1...h5 2.Bxg7 Rhg8 3.Bb2 f6 4.Nc3 Kb8 5.h3 Nh6 6.Na4
³ (-0.53) Depth: 12 00:01:00 52141kN
1...h5 2.Bxg7 Rh7 3.Qc3 Qd6 4.Be5 Qe6 5.b4 Nxe5 6.fxe5 Be7 7.0-0 Bh3
³ (-0.51) Depth: 13 00:01:59 109379kN
1...h5 2.Bxg7 Rh7 3.Qc3 Qd6 4.Bd4 Bxd4 5.exd4 Qxd4
³ (-0.53) Depth: 14 00:05:01 288309kN
(Silver, Private 02.09.2004)
Albert
>>>>Huh? That's quick! However, I would be even more impressed if I would see that
>>>>it found 14....Rh1 or 15....Rh1 from the same position in a short time.
>>>>Could you test it for that?
>>>>And what kind of AMD and Mhz are you using?
>>>>
>>>>
>>>>[Later, I would be staggeringly fascinated to know if your computer EVER arrives
>>>>at the (possibly best moves) of 10...Ng4 and/or 11...h5. If so, I might even
>>>>propose that computers have almost solved chess!]
>>>>
>>>>Thanks!
>>>>S.Taylor
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.