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Subject: Re: Test for Dedicated Units, and a Mate Test for PC Programs

Author: John Merlino

Date: 12:13:27 07/26/05

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On July 26, 2005 at 02:59:04, Terry McCracken wrote:

>On July 25, 2005 at 23:58:21, John Merlino wrote:
>
>>On July 25, 2005 at 22:35:56, Terry McCracken wrote:
>>
>>>A position taken from a G/2 I played earlier today with a pretty finish.
>>>
>>>[D]2r2rk1/3R2pp/p5n1/1pp1Pp2/5P2/2B2Q2/qPP3PP/3R2K1 w
>>>
>>>For those who want to solve it without a computer, I'll not give the killer
>>>move:)
>>>
>>>Terry
>>
>>I spotted it, but that's only because I knew what to look for. :-)
>
>When playing bullet, you always need to keep an eye on tactics and patterns,
>much of it is intuitive, for example in this game I didn't work out all the
>lines as it would be prohibitively costly.
>
>So you look at the outline and check the basic refutations as fast as possible
>which isn't easy, as you grow older...so many of my combos are lost on time or
>inaccuracies, or the failure to follow through correctly.
>
>Terry

As I suspected.

Oh, and by the way, e6 also leads to a forced mate -- but in one move longer
than Rxg7+.

But here's the hard move to find OTB (or possibly even for an engine). After
1.e6 Rf6 {forced} 2.Rxg7+! Kf8!, you have this position:

[D]2r2k2/6Rp/p3Prn1/1pp2p2/5P2/2B2Q2/qPP3PP/3R2K1 w - - 0 3

Now find the optimum move -- 3.b3! Of course, many other moves win, though. So
it's probably not a good test.

jm



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