From: Reijer Grimbergen <grimberg <at> ETL <dot> GO <dot> JP>
Date: 2 feb 2001
Subject: Re: Antwort: Ranging vs Static

Here are the statistics for professional games over the last three years
(taken from Shukan Shogi no.853, August 16th 2000):

Black Yagura:       1997-1998    55.3%
                    1998-1999    51.9%
                    1999-2000    54.9%

Black Ranging Rook: 1997-1998    43.9%
                    1998-1999    46.4%
                    1999-2000    41.8%

White Ranging Rook: 1997-1998    44.2%
                    1998-1999    45.2%
                    1999-2000    44.6%

Black Aigakari:     1997-1998    44.9%
                    1998-1999    52.0%
                    1999-2000    42.2%

Black Yokofudori:   1997-1998    57.8%
                    1998-1999    45.1%
                    1999-2000    47.4%

Black Kakugawari:   1997-1998    60.8%
                    1998-1999    55.4%
                    1999-2000    62.4%

So black should aim for the kakugawari opening (or yagura) and white
should play yokofudori. Statistically ranging rook is a bad choice, so
Morishita blundered early against Tanigawa (^-^).

Reijer

Chiaki Ito wrote:
>
> i have also seen such statistics somewhere on shuukan shogi.  dont they
> have it once every year?
>
> chiaki
>
> At 23:12 01/02/01 -0500, you wrote:
> > At 04:25 PM 2/1/01 -0500, you wrote:
> > >
> > >Has there been a breakdown of who does better in each game type as either
> > black or white?
> > >I know that usually it is around 51% : 49% but do these ratios change
> > depending on whether double static, static vs ranging (both
> > >ways around) and double ranging?
> > >Alan
> > >
> >      I have seen such statistics for individual years in the past, but not
> > recently.  The traditional view, presumably based on actual results, is
> > that ranging rook is more suitable for the second player because it was
> > considered primarily defensive in nature.  I believe that in double static
> > games, the first move feels more significant, and probably the statistics
> > favor the first player by more than the overall average.  There are
> > normally not enough double ranging games for such statistics to be very
> > meaningful.
> >      However recently the ranging rook has become more of an offensive
> > strategy, at least when the static side avoids a quick attack.  Perhaps for
> > this reason, the first move is also starting to mean more in static vs.
> > ranging games, and therefore ranging rook is now seen almost as frequently
> > for the first player as for the second.  All of this is primarily due to
> > the influence of Ryu-O Fujii.
> >
> >      Larry
> >

--

Reijer Grimbergen
Complex Games Lab
Electrotechnical Laboratory
1-1-4 Umezono, Tsukuba-shi, Ibaraki-ken, 305-8568 JAPAN
E-mail: grimberg <at> etl <dot> go <dot> jp
URL: http://www.etl.go.jp/etl/suiron/~grimberg/
Tel: +81-(0)298-61-3316
Fax: +81-(0)298-61-5918