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Subject: karpov - deep thought 1990

Author: Richard Bean

Date: 00:49:02 06/17/03


"Surprisingly, by move 16 Deep Thought had a chance to make a sacrifice that
would have placed Anatoly under tremendous pressure.  Had the game been played
with a regular time control, then Deep Thought would have made the sacrifice.
The 3-workstation version of the program that played Garry potentially could
find the sacrifice within the game time, assuming that we had got it working for
the match. It is amazing how a minor difference could have changed the history
dramatically.

Since Deep Thought could not find the sacrifice over the board, it played the
second best move and Anatoly obtained a slight edge."

"Behind Deep Blue", pp120-1

Karpov - DT
1.e4 c6 2.d4 d5 3.Nd2 g6 4.c3 Bg7 5.e5 f6 6.f4 Nh6 7.Ngf3 O-O 8.Be2 fe5 9.fe5 c5
10.Nb3 cd4 11.cd4 Nc6 12.o-o Qb6 13.Kh1 a5 14.a4 Bf5 15.Bg5 Be4 16.Nc5 Qb2

fen after white's 16th:
[D]r4rk1/1p2p1bp/1qn3pn/p1NpP1B1/P2Pb3/5N2/1P2B1PP/R2Q1R1K b

After an 18 ply search, Ruffian 1.0.1 (P4 2.4Ghz, 256Mb hash) and Crafty 19.3
(Dual Athlon MP 2000+, 768Mb hash) both like 16...Nf5.  Are they missing
something, or is there a mistake in the book?



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