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bob440
Hairspring
twixt.ld.DEFAULT (LG)

This game (LG)

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On 20210218 at 00:09,
bob440
said:
I thought maybe Hairspring wasn't paying attention with
10.i15
, but
11.k18
left a big hole on the left side, which
12.l13
quickly showed.
So, looks like the "standard" 
11.i14
12.j13
13.h16
is better here
On 20210218 at 12:40,
Peyrol
said:
white L16 looks losing to me, just because of the problems that black L18 gave you. I dunno, maybe 
7.k17
8.m9
9.i9

11.i14
12.m9
then for example
13.m10
14.l11
15.n8
16.o12
17.l12
18.k14
or
13.i10
14.h13
15.j16
16.j12
17.m8
18.n7
19.l10
20.l8

11.g14
also loses after
12.h12
13.k14
14.j17
15.i13
16.f18
17.f16
18.h18
19.e20
20.f19
21.d18
22.d17
or
13.f11
14.g11
15.g13
16.h13
On 20210223 at 23:37,
bob440
said:
I disagree that L16 is losing. I simply played Achilles to early. I think white's position looks pretty good after

9.j17
10.j19
11.h18
12.h20
13.d19
On 20210223 at 23:38,
bob440
said:
doh! "too early," not "to early"
On 20210224 at 10:27,
Peyrol
said:

9.j17
10.j19
11.h18
12.h20
13.d19
14.j8
is a negative ladder catcher.
15.m9
16.f20
17.e21
18.e22
19.d23
20.e18
21.e17
22.f16
23.f15
24.g14
25.g13
26.h12
27.h11
28.i10
29.g9
30.g5
or
25.e13
26.f11
or
15.j10
16.i10
17.h11
18.o8
for example. The threats are widely separated and I don't see what white can do about it.
On 20210224 at 22:06,
bob440
said:
ahem, that's JUST A TAD different than "just because of the problems that black L18 gave you"
but, that's okay, I learned about "negative ladder catcher" and added it to the toolbox
now all I have to do is remember it and recognize when to use it
On 20210225 at 00:05,
Peyrol
said:
I'm sorry for being vague, but of course this is a full board battle. I should have said from the start that pressure from L18, coupled with pressure on the top half, is why I believe L16 loses. I did feature threats along the top half prominently in my first post. Although I did not give white's best defense in my last line. 
9.j17
10.j19
11.h18
12.h20
13.d19
14.j8
15.i10
16.k6
17.n7
18.l4
19.o5
20.k11
21.e17
22.o11
23.r12
24.p9
or
21.o13
22.g18
23.e17
24.f16
25.f15
26.g14
27.g13
28.h12
29.f11
30.j13
31.f7
32.g5
or
31.f6
32.f8
33.g9
34.g6
35.h5
36.i5
Is a lot messier than I thought but I still believe black wins.
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So, looks like the "standard" 11.i14 12.j13 13.h16 is better here
11.i14 12.m9 then for example 13.m10 14.l11 15.n8 16.o12 17.l12 18.k14 or 13.i10 14.h13 15.j16 16.j12 17.m8 18.n7 19.l10 20.l8
11.g14 also loses after 12.h12 13.k14 14.j17 15.i13 16.f18 17.f16 18.h18 19.e20 20.f19 21.d18 22.d17 or 13.f11 14.g11 15.g13 16.h13
9.j17 10.j19 11.h18 12.h20 13.d19
but, that's okay, I learned about "negative ladder catcher" and added it to the toolbox
now all I have to do is remember it and recognize when to use it