Ticket #184 (new defect)

Opened 20 months ago

False and half eye detection at the edge

Reported by: gunnar Owned by: gnugo
Priority: normal Milestone: 3.8
Component: source Version:
Severity: normal Keywords:
Cc: patch: no

Description

The mailing list thread starting with http://lists.gnu.org/archive/html/gnugo-devel/2007-03/msg00011.html discusses weaknesses in the detection of false and half eyes at the edge.

Specifically, in this position





the bigger white eyespace gets the graph "...!" which implies a secure eye. More properly the graph should be ".h!". The immediate problem is that topological analysis only is applied for non-marginal eyespace points with at most one neighbor inside the eyespace.

Attachments

testcases_7_11.1.diff (0.8 kB) - added by gunnar 20 months ago.
Four testcases from two positions.
optics_7_11.1.diff (0.5 kB) - added by gunnar 20 months ago.
Proposed optics revision from http://lists.gnu.org/archive/html/gnugo-devel/2007-04/msg00004.html
optics_7_11.1b.diff (0.9 kB) - added by gunnar 20 months ago.
Alternative optics revision.

Regression Results

Attachment Rev. PASS FAIL Nodes Status
optics_7_11.1.diff 2383 28 40 +1.2% +1.4% +0.37% details
optics_7_11.1b.diff 2383 26 34 +0.76% +0.88% +0.26% details
testcases_7_11.1.diff never tested

Change History

Changed 20 months ago by gunnar

Four testcases from two positions.

Changed 20 months ago by gunnar

Changed 20 months ago by gunnar

Alternative optics revision.

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