Author: Albert Silver
Date: 09:43:45 07/25/01
Go up one level in this thread
On July 25, 2001 at 12:25:00, Albert Silver wrote:
>On July 25, 2001 at 06:40:11, Sune Larsson wrote:
>
>>On July 25, 2001 at 00:36:00, Dann Corbit wrote:
>>
>>>On July 24, 2001 at 23:06:58, John Hatcher wrote:
>>>
>>>>On July 24, 2001 at 20:57:16, Dann Corbit wrote:
>>>>
>>>>>Not for me, it was asked in this message:
>>>>>http://www.icdchess.com/forums/1/message.shtml?180953
>>>>>
>>>>>Since the header of that message is not descriptive of the actual problem, I
>>>>>thought I would start a new thread so that the OP might find the answer.
>>>>>
>>>>>I'm pretty well ignornant when it comes to CB.
>>>>
>>>>In all seriousness, why would anyone want to build an opening book from 1.5
>>>>million games?
>>>
>>>That's a pipsqueak compared to some database files I know of.
>>>I know of one collection with 7.1 million games between rated players.
>>>
>>>>Surely, 1.3 million of the games would be between Joe Blow and
>>>>Norm Nobody. Who cares what they played in the opening? I would be very
>>>>surprised if all the recorded games between International Masters and
>>>>Grandmasters totaled more than 300,000 games.
>>>
>>>Prepare to be surprised. I have 380K in my tiny (highly filtered) set of 2.5
>>>million games. I throw out any games with the same move sequence. There are
>>>lots of non-duplicate games that get clubbed from that.
>>>
>>>I have about one million games between computer opponents. Perhaps I want to
>>>include those also.
>>>
>>>>I extracted, from a database of 1.5 million games, all the games where both
>>>>players have an actual, or historical (e.g., Capablanca), rating of 2500+
>>>>There are only about 100,000 games in that book.
>>>>
>>>>I wouldn't want a book comprised of 1.5 million games. There'd be a lot of
>>>>chaff with the wheat.
>>>
>>>Well, to each his own. I wasn't asking for me, but (rather) for someone else.
>>>Anyway, I think it's shortsighted to try to decide what is better for other
>>>people.
>>>
>>>Imagine (for instance) that they want to prepare for someone of ELO 1800 in
>>>their database. They might notice (for instance) that they lose 70% of the time
>>>to the french defense.
>>>
>>>In my case, I intend to (at some point) analyze every move that has ever been
>>>played. I estimate there are about one billion distinct positions in that
>>>category.
>>
>>
>> Wow Dann, analyzing every move that has ever been played... In that case
>> please add the following little curiosity. ;-) It's a game played in the
>> club-ch 30 years ago when I was a very young junior.
>>
>> White: Larsson,S Black: Teikari,H
>>
>> 1.e4 e5 2.Nf3 Nf6 3.Bc4 (always attacking at that time...;-)
>> 3.-d5 (home cooked brewage) 4.exd5 e4 5.Qe2 (played after pondering 30 min -
>> the point of this move is shown in the 9th move.) 5.-Be7 6.Ne5 Qd6
>> 7.Bb5!+ (looks very weird - the white knight is threatened and this move
>> just puts another piece en prise.) 7.-c6 8.dxc6 bxc6 9.Qc4!! (The point -
>> black's double threats are turned into ditto for white, c6 and f7 are hanging
>> + an x-ray attack on c8!) The black player was clearly shocked here and
>> castled - 9.-0-0. After 10.Nxc6 he was two pawns down and white won after
>> 40 moves, 1-0. A nice memory.
>>
>> Sune
>
>Nice one Sune. :-) One question: can't Black play 9...Be6 and if 10.Bxc6+ Kf8
>leaving the pieces en prise and the queen now attacked? I'd have to check it on
>a board, but it looks ok at first view.
Just for the fun of it, here's one of mine (atypical BTW) when I was still
starting out. I was rated 1510 at the time, and can't remember the opponent's
name.
W: Silver, A. B: Some guy.
1.e4 d6 2.d4 Nf6 3.Nc3 g6 4.f4 Bg7 5.Nf3 0-0 6.Bd3 Nbd7 (I didn't know a thing
on this) 7.e5 Ne8 8.Ne4 e6 9.h4 h5 10.Nfg5 dxe5 11.dxe5 Qe7 (I knew he was
planning on f6) 12.g4 hxg4 13.h5 f6 14.h6! (I think it's a !. I haven't looked
at this in a LONG time) Bh8 15.h7+ Kg7 16.Qxg4 fxg5 17.Qh3! (my opponent visibly
shaken resigned)
Albert
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