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RE: [computer-go] double threats



> Let's say that two blocks are threatened and the defender may choose
> which block he wants to give up. Then the block tactician might treat
> the two blocks as "half-DEAD" or it might treat the bigger (or
> "more important") block as ALIVE and the smaller one as DEAD.
> ...
> Jens
 
This is exactly what SmartGo does. If it determines that one block is important and the other one is not, then it declares the important one as unsettled and the other one as alive, otherwise it declares both of them as unsettled. Currently, it deems a block to be important if it's either:
- 3 stones or more, or
- surrounded by multiple chains (a likely cutting stone), or
- adjacent to an unsettled group.
 
This seems to work reasonably well in practice, but I'd certainly be interested in better solutions.
 
Anders Kierulf
www.smartgo.com
 
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