[net.chess] NEWS FLASH! Machine "sac's" piece

mclure%sri-unix@sri-unix.UUCP (07/07/84)

Here is a fascinating game between me (USCF 1553/15) and my Prestige
(est.  1800+) which got a performance rating of 1868 in a recent U.S.
Open.  Dr.  Irazoqui, an independent rater, estimates Prestige at USCF
1875.  I do not know if it has a formal USCF rating, but I am sure it
has played at least the required 20 games for a rating.  Also, its play
is definitely class A.  I have played 33 games against it and have
whatever miniscule percentage is required for it to be rated 300+
points ahead of me according to the ELO curves.  This puts it well into
the 1800's.  Also, it makes mincemeat of the various other programs on
the market as shown in Irazoqui's 1984 Computer Chess Digest.  This is
the original Prestige and does not have the recent upgrades that boost
the rating a supposed 20-50 points which I am leery of paying $200 to
obtain.

I am White and play into a Sicilian I know nothing about.  I make a few
weak moves and am in a bind early.  Just at the point I think I am
consolidating and getting all my pieces developed, the machine plays a
devastating move (17....  Ng3!!).  I would be interested to hear what
strong players think of this move and the ensuing variations should
White avoid returning the material.  I was totally unprepared for the
move and lost quickly.

This is the best game I've seen any micro play.  Indeed, I think it
rivals the famous Blitz vs.  Belle game a few years ago when Belle
played a stock rook sacrifice at h2 against Blitz in a long mating
combination.  This has similarities.  Here it is a stock sacrifice when
the enemy has all his pieces on one side of the board away from the
defence of the king.  But I prefer the sacrifice here to Belle's for
aesthetic reasons.  The position just didn't seem that alive here to
warrant such a move, whereas in the Belle game, the rook sac seemed
plausible from the outset because of the open rook file.

Cracraft/1553 vs. Prestige, Time control: 40 moves in 2 hours, 20 in 1
1.  e4   c5	11. o-o   Bb7	21. Kf1   Bd4
2.  Nf3  Nc6	12. f3	  Rd8	22. Ke1   Qe5
3.  d4   cd4	13. Rd1	  Qd4	23. Kf1   Qe3
4.  Nd4  g6	14. Kh1	  o-o	24. Rde1  Qg1
5.  c4   Bg7	15. Nc3   Qc5	25. Ke2	  Qg2
6.  Nc6  bc6	16. Bf4   Nh5	26. Kd1   Qf3
7.  Qc2  Nf6	17. Bd2   Ng3!	27. Kc1   Bc3
8.  Bd3  d5	18. hg3   Qh5	28. resigns
9.  ed5  cd5	19. Kg1   Bd4
10. cd5  Qd5	20. Be3   Be3