Am 14.07.2011 17:39, schrieb Petr Baudis:
On Thu, Jul 14, 2011 at 02:07:50PM +0200, Stefan Kaitschick wrote:
Just a hand waving explanation for the ratchet: you simply cannot
afford to cede ground to black when giving a handicap.
Even though the playouts do not model a weak response by black, a
winrate of 42% implicitly does assume a weaker opponent.
When the winrate starts dropping at the current komi level, that
probably means that the weaker player is going head to head instead
of retreating.
It that situation white must conquer or perish.
But that's the strange thing - ratchet does not do this, it does the
other thing, preventing _giving_ too big komi. I have found no need for
a ratchet when taking komi.
Ah ok. You don't use it for white in a handicap game?
For black I would wave my hands differently:
Since the opponent must be stronger, it's a good heuristic to assume a
problem with your own analysis if you think your improving.
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