[gnugo-devel] little OWL problem

[max-d]

This problem was solved by GNUGo 3.2 (and 3.4 cosmic enabled).

Normally the problem starts at move 13=white P1
I have edited the position until 16=black Q1 then asked OWL
The followng moves are OWL's analysis with the conclusion that black can
escape.

W:S1 B:N1 W:O1 B:M2 W:N3 B:L1 W:L4

All this is wrong of course
The responsable seems to be

Pattern D1137 and
Pattern D1140...

But
Pattern A406c found at 23=L4 seems also too much general since the white
group has no need to search for some escape .


labelling "e" the white O1 stone in the contraint diagrams  (both Pattern
D1137 and Pattern D1140) and adding the contraint  "&& !weak(e)" or somewhat
similar solve the problem.

md.
(;RU[Japanese]SZ[19]HA[0]KM[5.5]
;W[mr]
;W[nq]
;W[oq]
;B[or]
;W[pq]
;B[pr]
;W[qq]
;B[qr]
;W[ro]
;W[rq]
;B[rr]
;B[sr]
;W[os]
;B[nr]
;W[ns]
;B[ps]
;W[rs]
;B[ms]
;W[ns]
;B[lr]
;W[mq]
;B[ks]
;W[kp]
)