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Subject: Re: Positional test move

Author: Dan Andersson

Date: 11:43:35 03/26/04

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On March 26, 2004 at 13:49:45, Kurt Utzinger wrote:

>[D]r1b1r1k1/ppq3pp/2n1pp2/3pP3/8/2PBQN2/PP3PPP/4RRK1 b - - 0 17
>
Instant blip on the radar.
Engine  UCI 62 MB 933MHz PIII Cu-Mine:
 6   00:00 -0,64   f6f5 Nf3g5 Bc8d7 f2f4 h7h6 Ng5f3
 7   00:01 -0,51   f6f5 Nf3g5 Bc8d7 f2f4 h7h6 Ng5f3 a7a6
 8   00:01 -0,57   f6f5 Nf3g5 Bc8d7 f2f4 h7h6 Ng5f3 Qc7b6 Qe3xb6 a7xb6
 9   00:03 -0,51   f6f5 Nf3g5 h7h6 Ng5f3 Bc8d7 Re1d1 a7a6 a2a4 Re8f8
10   00:05 -0,51   f6f5 Nf3g5 h7h6 Ng5f3 Bc8d7 Re1d1 Re8f8 Rf1e1 Qc7b6 Qe3c1
11   00:09 -0,48   f6f5 Nf3g5 h7h6 Ng5f3 Bc8d7 Re1a1 Re8c8 Rf1e1 Bd7e8 Nf3d4
Nc6xd4 c3xd4
12   00:15 -0,48   f6f5 Nf3g5 h7h6 Ng5f3 Bc8d7 Re1a1 Re8c8 Rf1d1 Bd7e8 c3c4
d5xc4 Bd3xc4 Qc7e7
13   00:33 -0,48   f6f5 Nf3g5 h7h6 Ng5f3 Bc8d7 Re1a1 Re8c8 Rf1d1 a7a6 a2a3 Bd7e8
Nf3d4 Nc6xd4 c3xd4



>How long needs your engine to avoid 17...fxe5? which would be
>a positonal bad move since Black remains with a passive bishop
>on c8 and a weak backward pawn on e6. Best seems to close the
>centre with 17...f5 but other moves keeping the tension are
>also stronger than 17...fxe5?

 The position seems critical after any move. Black must parry the threat
exf6/c3-c4 thus the number of possible moves are severely limited.
 After 17. .. f5 then the slow 18. a3 or the brutal 18.c4 both seem promising.

MvH Dan Andersson



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