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Subject: Tactical trap

Author: James Robertson

Date: 18:12:40 03/04/99


Today my program played a game to this position with SSEChess:

2rq3r/6bk/pPB1b1pp/5p2/2NP1n2/5N2/PP1Q1PP1/2R2RK1 w - -

Here my program played Nce5? which leads to a forced loss of material after 1.
... Bxe5 Nxe5 Qg5.

I ran some analysis with my program, and it seems unaware of the impending
disaster because it can push it away with moves like b7 and Qc2. It seems to see
a general decline of the score as time goes on, but still walks into it with
Nce5. My question is: can any (amateur) program avoid Nce5 in less than about 10
seconds? Crafty switches to Na3 fairly fast, and I'm curious of what other
people will say.

Currently, on depth 10, my program (it's still thinking!) failed low with Qxf4,
score 125. I wonder what it will say when it finishes depth 10.

James


JR's CP
Version 0.3, 03-04-99

level 1 20 0 white go
 1   225          0        233 Nce5
 2   221          0       1034 Nce5 Nd5
 3   264          0       3413 Nce5 Nd5 b7
 4   260        170      17815 Nce5 Bxe5 Nxe5 Qh4
 5   270        720      89373 Nce5 g5 b7 Rc7 Qb4
 6   224       3080     349697 Nce5 Bxe5 b7 Rxc6 Rxc6 Bd6 Rxa6
 7   224       9400    1091111 Nce5 Bxe5 b7 Rxc6 Rxc6 Bd6 Rxa6
 8   190      36200    4194867 Nce5 Bxe5 b7 Rb8 Nxe5 Qxd4 Qxd4 Ne2+ Kh1 Nxd4
 9   164     157200   19320933 Nce5 Bxe5 Nxe5 Qg5 Qc2 Nxg2 Nf3 Qg4 b7



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