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Re: [gnugo-devel] regression tests questions.

From: Gunnar Farnebäck
Subject: Re: [gnugo-devel] regression tests questions.
Date: Fri, 17 Feb 2006 21:05:45 +0100
User-agent: EMH/1.14.1 SEMI/1.14.3 (Ushinoya) FLIM/1.14.2 (Yagi-Nishiguchi) APEL/10.3 Emacs/21.3 (sparc-sun-solaris2.9) MULE/5.0 (SAKAKI)

Alain wrote:
> ----------------------------------------------
> strategy:18     FAIL E5 [E4|F3]
> games/incident165.sgf 142 th_move, 146 stones, gstatus 0.76, SZ 19,
>  Best was E4 (16.2), changed to E5 (38.9)
> i think E5 is best

E5 allows white to cut at F3 and at least one stone will be captured.

> -----------------------------------------------
> nngs1:46        FAIL J5 [!J5] 
> games/nngs/gnugo-3.1.29-coco-200203281540.sgf 54 th_move, 52 stones,
>  gstatus 0.43, SZ 19, Best was B12 (20.6), changed to J5 (41.4)
> Why not j5 ? Comment says to defend upper right ???

(This was also discussed on KGS.)
The upper right corner can be attacked by a two-stage ko, but it's not
obvious to me that defending the corner is bigger than J5. Replacing
this test with an owl test for the upper right corner is probably the
best solution.


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