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Subject: Re: Rdd3? Hiarcs9: f4!

Author: Andreas Guettinger

Date: 11:04:34 10/06/05

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On October 06, 2005 at 11:52:05, Will Singleton wrote:

>On October 06, 2005 at 10:23:07, Uri Blass wrote:
>
>>On October 06, 2005 at 05:26:16, Bruce Moreland wrote:
>>
>>>On October 06, 2005 at 04:10:32, Andreas Guettinger wrote:
>>>
>>>>On October 05, 2005 at 21:03:11, Will Singleton wrote:
>>>>
>>>>>A comp played this move against my comp on ICC today, took less than 30 secs.
>>>>>Can any program find it as fast?
>>>>>
>>>>>[d]3rn1k1/2qbrp1p/1p1ppnpQ/p5NP/1PP1P3/P1N4R/4BPP1/3R2K1 w - - bm Rdd3
>>>>
>>>>Hiarcs 9.6 UCI plays f4 here. 21s on Mac 400 Mhz.
>>>>I think f4 followed by f5 wins on the spot: f4 Rb8 f5 exf5 Nd5! Qd8 c5! or f4
>>>>Bc6 f5 exf5 exf5 Qd7 hxg6 fxg6
>>>>
>>>>
>>>>5 +4.13  bxa5 bxa5 hxg6 fxg6 e5 dxe5 Bd3 (1.68)
>>>> 6 +3.81  bxa5 (3.07)
>>>> 6 +3.67  bxa5 bxa5 hxg6 fxg6 (3.37)
>>>> 6 +3.72  hxg6 (3.43)
>>>> 6 +3.72  hxg6 fxg6 (4.01)
>>>> 6 +3.73  f4 (4.24)
>>>> 6 +3.82  f4 Bc6 Rd4 Rc8 (4.53)
>>>> 6 +3.83  Rhd3 (5.04)
>>>> 6 +3.84  Rhd3 Rc8 Rf3 Bc6 Rf4 d5 (5.36)
>>>> 6 +3.85  Rf3 (6.50)
>>>> 6 +4.09  Rf3 Bc6 hxg6 fxg6 b5 Bb7 Rxf6 Nxf6 (6.70)
>>>> 7 +4.02  Rf3 Bc6 Bd3 axb4 axb4 Ra8 Bc2 (8.27)
>>>> 8 +3.87  Rf3 Bc6 Kh1 d5 exd5 exd5 hxg6 fxg6 Rxf6 Nxf6 (18.75)
>>>> 8 +3.88  f4 (21.80)
>>>> 8 +4.30  f4 Rc8 f5 axb4 axb4 gxf5 exf5 d5 fxe6 fxe6 (29.15)
>>>> 9 +4.32  f4 axb4 axb4 Bc6 f5 exf5 exf5 (59.51)
>>>>10 +4.64  f4 (159.09)
>>>>10 +4.64  f4 Bc6 f5 exf5 exf5 Qd7 fxg6 fxg6 hxg6 (169.23)
>>>>11 +4.89  f4 Rb8 f5 exf5 Nd5 Qd8 Rf1 Bc6 hxg6 fxg6 (541.13)
>>>>12 +4.99  f4 Bc6 f5 exf5 exf5 Qd7 hxg6 fxg6 fxg6 (1570.23)
>>>
>>>If this is the complete line it's not very convincing.  If a high score is all
>>>that it takes to earn respect, I'll have mine display +3 on every move.
>>>
>>>The move is probably good, but there is not +5 in the line.
>>>
>>>bruce
>>
>>I think that the position is a bad test position because there are many winning
>>moves.
>>
>>I guess that f4 is one of the moves that leads to forced mate if you search deep
>>enough.
>>
>
>You have to show the line if you think f4 or other moves are equivalent or
>better, not just speculate.  My analysis shows that Rdd3 d5 Nxh7 is about 3
>pawns better than, for example, f4 b5 f5.  The fact that white will win is
>likely true, but that doesn't mean Rdd3 isn't the best move.
>
>Will

I agree that Rdd3 wins as easily. From a human point of view f4-f5 was very
convincing, because moves like (Rdd3) d5?! make not much sense, but seems to be
a necessity.  Hiarcs gives for Rdd3 +6 too.
Unfortunately, blacks position is lost.

What is strange is that Hiarcs gives +4 from the spot without seeing a material
gain.
regards
Andy



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