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Subject: Tactical Problem Sets (was Re: ECM errata (101 thru 150))

Author: Dave Gomboc

Date: 10:39:29 01/25/98

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On January 25, 1998 at 00:16:27, Howard Exner wrote:

>On January 24, 1998 at 23:43:57, Bruce Moreland wrote:
>
[snip]
>>Yeah, I think so.  This is true for the first one, and it's true for the
>>last one, so it's probably true for the ones in the middle.
>>
>>The position at issue is #142 by my way of counting, and #1080 according
>>to the book.  The positions are actually numbered both ways in the file
>>I use.
>>
>>b3r3/q2B2k1/3Q2p1/1p5p/3pP3/5P2/1p4PP/5RK1 b - - 0 1
>>
>>The key here is 1. ... d3.
>>
>>Someone told me yesterday that this position appears in the BT2450 test
>>suite, a few plies later (I think that 1. ... d3 2. Kh1 are played), so
>>you are supposed to find 2. ... Qf2.
>>
>>If you could post the solution line for this, that would be great.
>
>I posted this on Amir Ban's original thread a while ago. Here it is
>again for you: After Qf2 white faultered with Qxd3? (not as good as
>the suggested Rd1 which I think both you and Ernst came up with).After
>Qxd3 the nice win begins with Bxe4 2.fxe4 Qxf1 3.Qxf1 Ra8 0-1.

Yes, ECM has 1... d3 2. Kh1 Qf2! 3. Qd3 Be4 4. fe4 Qf1 5. Qf1 Ra8 0:1.
It doesn't consider any sidelines at all.

I think this ECM fixing is great.  I will have a large list of fixes to
positions and I'll store them in the back of the book so that when I
train with them I will have a better answer key to compare against.

Right now I am still doing the "Test Your Chess IQ books 1 and 2", which
are largely too simple for today's hardware and software.  Has anyone
tried any positions from Test Your Chess IQ: Grandmaster Challenge on
their program?

Dave Gomboc



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