Author: Komputer Korner
Date: 14:10:31 08/30/98
Go up one level in this thread
On August 27, 1998 at 23:25:58, Serge Desmarais wrote:
>On August 24, 1998 at 13:43:45, Robert Henry Durrett wrote:
>
>> John Watson, in his book Play the French, New Edition, © 1996, on page 160,
>>gives: 1.e4 e6 2.d4 d5 3.Nc3 Bb4 4.e5 c5 5.a3 Bxc3+ 6.bxc3 Ne7 7.Qg4 Qc7 8.Qxg7
>>Rg8 9.Qxh7 cxd4 10.Ne2 Nbc6 11.f4 Bd7 12.Qd3 dxc3 and says this is "a position
>>arising in the vast majority of 10.Ne2 games." In fact, this position occurs
>>in many GM games.
>>
>>This is a tabiya {spelling varies} position in the French Winawer. Tabiya
>>positions are, literally, the starting points for many grandmaster games. The
>>players quickly move through the moves leading up to the tabyia position, using
>>almost no time on their clocks. These positions are usually evaluated as equal
>>or unclear. Typically, tabyia positions have GM advocates for both sides. In
>>fact, it is not uncommon for a given GM to be willing to play from a tabyia
>>position from either side. Also, tabyia positions occur in a large number of
>>games, as any large database will show. As a rule, there is much written about
>>a tabyia position in the chess literature. Also typically, a given tabyia will
>>have many possible ideas or "ways to proceed" for both sides and discussions of
>>these ideas are discussed in the literature.
>>
>>Indeed, tabyia positions are "special" in the world of serious chess players.
>>Being, effectively, the starting positions of many games, they share something
>>in common with the "initial position" which is on the chessboard prior to any
>>moves being made in the game.
>>
>>To see the importance of tabyia positions in chess, it is only necessary to
>>recognize that virtually every major opening variation, of which there are many,
>>have their tabyia positions. Taken together as a set, they constitute the REAL
>>"starting position" for serious chess.
>>
>>If the so-called "initial position" deserves to have it's own "opening book,"
>>for whatever reason, then tabyia positions do too, for much the same reasons.
>>Every "starting position" needs a book because the existing opening theory goes
>>far beyond where chess engine's can go without a "book" for the tabyia.
>>
>>So, my question is: Do most chessplaying computer programs provide a "book" for
>>each tabyia position? If not, why not?
>
>
> Normally, these are very theoritical positions. The longest lines in the ECO.
>That is why in Fritz 5, when you import new games in the tree, you can specify
>ECO (last ECO known position for each games) PLUS N half-moves. So, if you have,
>say, 10,000 games containing this "starting position", you can include the N
>moves after that position from all the games in your book. Then, the more often
>played will have a higher percentage of being played by Fritz, that also takes
>the results of the games into account. (For example, if move Y lost 90% of the
>time, it will never be played, even if it is found in 2,000 games...)
>
>Serge Desmarais
Tabiya positions are nothing more than unclear positions which have an average
evaluation of +/=/= or 56% score for white.
--
komputer Korner
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