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Re: [Bug-gnubg] miscellaneous bugs and suggestions

From: Robert-Jan Veldhuizen
Subject: Re: [Bug-gnubg] miscellaneous bugs and suggestions
Date: Fri, 06 Sep 2002 02:20:14 +0200

At 20:55 9/5/2002 +0000, you wrote:

On Thu, Sep 05, 2002 at 04:18:20AM +0200, Robert-Jan Veldhuizen wrote

> - how about extending "rollout cube decision" so that one can also just
> check the double decision (only upper rollout)

The double decision requires both rollouts as well as the equity for
"double, pass".

You're right that often you need both values (and double,pass is just +1 EMG of course), but not always:

If it's a take, yes. But there's also doubling decisions where the pass might be trivial (double/take equity >> 1), and the only question is whether it's too good (no double eq > 1) or double/pass; then you're only interested in the upper row of a cube decision rollout.

A bit similar to the scenario where the double is clear and you're only interested in the take decision, and you only need the bottom row a cube decision rollout.

Seems like an interesting option to me, since it can speed up such a rollout by quite a lot I think. Especially when a position is close to "too good", rolling out the sceanrio with opponent owning the cube could mean a long game (recubes/passes seem unlikely here), and the result is often not so interesting since it's clear that it's a big drop.

Robert-Jan (Zorba on FIBS)

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