Author: Charles Roberson
Date: 06:37:30 11/23/05
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I've experimented with both methods. My results for method 2 were identical
to yours and were caused by an horizon effect. Simply put: the draw wasn't seen
because the second repeat was delayed beyond the horizon by a series of moves.
This is the same problem as not seeing a mate due to a long series of delaying
moves/sacrifices. Of course, various types of extensions reduce the
probabilities of mate delays being an issue but think of it without the
extensions.
However, there is a third option which is used by some of the others. The
idea is to have a no progress penalty. So use method two, but when you see the
first rep assign a no progress penalty. This may help. I had a conversation with
Tony Werten (Xinix) about this, I believe he uses it.
Charles
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