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Subject: Can Chess Engines perform Real Sacrifices???

Author: Laurence Chen

Date: 20:50:48 12/13/98


I am getting tired of hearing people making statements that their chess engine
is the most dynamic and it plays sacrifices for the initiative. Really?! I say
that is not always true, I believe that most of the sac which the chess engine
performs are pseudo sacrifices and very very very few indeed are true or real
sacrifices. I would suspect that Chess System Tal would be an exception because
I've seen games which CST makes lots of sacrifices,it knows no fear. I have the
following position for all of you CM 6000 supporters which claim that CM always
create winning situations and is always ready to perform a sacrifice for the
initiative. I've seen the type of sacrifices which CM performs, most of them are
pseudo-sacrifices, I've yet to see one which is a true sacrifice. So here's my
challenge to all of you CM supporters which claim that CM always make sacrifices
for the initiative, I would like you to get a copy of the book, Modern Chess
Sacrifice, by Leonid Shamkovich, and test all the positions in the book and tell
me how many true sacrifices CM finds. Seriously, before you make any claim make
sure you got some proof to back up your statement. I give the following
position: r1bq1rk1/pp2nppp/4p3/2n5/8/2NBPN2/PP3PPP/R2Q1RK1 w - - 1 0. It is from
the book mentioned above, the game between Capablanca and Molina, Buenos Aires,
1911. Capablanca anotates this game in his book, My Chess Career.
My chess engines, Fritz 5.16, Junior 5, and CM 6000 failed to find the best move
which Capablanca played. You guessed right, it is a sacrifice, and the chess
engines I used failed to find the best move 12. Bxh7+!
The game continued with the following moves, 12. ... Kxh7 13. Ng5+ Kg6 14. Qg4
f5 15. Qg3 Kh6 16. Qh3+ Kg6 17. Qh7+ Kf6. Quoting the book anotations to this
position, "White's operation has finally lost all the clarity and unambiguity of
a combination. Black has repulsed the first onslaught, is a piece up, and even
threatens to win White's Queen with 18. ... Rh8. White has several tempting
options of attack: 18. Rad1, 18. Qh4, and others. But which one should he
choose?" And once again in this position CM 6000 fails to find the best move 18.
e4!. I probably will get a lot of yeah but, surely there are positions which CM
will find sacs, my question is it a true sacrifice or a pseudo one? Pawn sacs
are very common, so please don't give me examples of pawn sacs. So besides CST
which I would suspect that it would play the move 12. Bxh7!, I could be wrong, I
would like to know if other chess engines are able to solve this position which
started as very quiet and simple and changed to a complex one.



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