Ticket #98 (closed defect: fixed)

Opened 4 years ago

Last modified 4 years ago

Strange cut

Reported by: sanxiyn Owned by: gnugo
Priority: normal Milestone: 3.7.9
Component: regressions Version:
Severity: normal Keywords:
Cc: patch: yes

Description

In the attached game, Black's move 19 at H3 is ineffective. Reading the trace, GNU Go even agrees! It says, "H3: -1.05 - suspected ineffective defense of worm J4". Still, it plays the move. Maybe penalty is insufficient, but I have really no idea.

Note that Black wins by 8 points in my alternative line with connecting at J5. That's 10 points difference.

Attachments

05.sgf Download (436 bytes) - added by sanxiyn 4 years ago.
arend_7_9.20.diff Download (1.2 KB) - added by arend 4 years ago.
Testcase

Regression Results

Attachment Rev. PASS FAIL Nodes Status
arend_7_9.20.diff Download never tested

Change History

Changed 4 years ago by sanxiyn

Changed 4 years ago by arend

Testcase

Changed 4 years ago by arend

  • status changed from new to closed
  • resolution set to fixed

The reason H3 is wrong is that GNU Go cannot win the ko. This is difficult to solve, but unfortunately a rather frequent problem. (Added as 9x9:630)

Changed 4 years ago by gunnar

  • patch set
  • component changed from source to regressions
  • milestone changed from 3.8 to 3.7.9
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