From: Pieter Stouten <stouten <at> INAME <dot> COM>
Date: 7 sep 1999
Subject: Re: Results Mind Sports Olympiad/Pan-Atlantic Shogi Championship

On 99/09/07 at 19:05 +0200, James Harnett wrote:

>>S = score; OS = sum of opponents' scores after round 9;
>>SB = Sonneborn-Berger score after round 9.
>>
>Would you please explain the Sonneborn-Berger scoring method for those who
>are not familiar with it?  What other scoring methods are used?
>
These are all tie-break criteria to be applied when players have
equal numbers of points. Sonneborn-Berger (SB) is the sum of defeated
opponents' scores. In Chess (where draws are possible) SB = 2 * sum
of defeated opponents' scores plus 1 * sum of "drawn" opponents'
scores. At the MSO/PASC I used SOS, SB and mutual game in that order.
At the European Championship they use (I believe) SOS, median SOS
(leave out the highest and lowest score), SB and mutual game.

There is also a "progressive" system (don't know the exact name)
where earlier losses (with supposedly a "lighter" program to follow)
have more of a negative effect than later losses. I don't know if
that system is used in Shogi.

Hope this helps,

Pieter