(;AP[HexGui:0.10.GIT]
C[2021/10/22

Black\: Peter
White\: Frank

White wins.]FF[4]GM[11]PL[B]
SZ[11];B[a3];W[h4];B[i8];W[d8];B[f5];W[h3];B[e6];W[e3];B[d5](;W[c4]
C[Eric\: Better f4, see next variation.];B[b6];W[c6];B[g7]
C[Peter\: Better g3 (connect and take away White's forcing move at d6)?

Eric\:

At the time, I would've said either was fine, but using what White actually did towards the left, I can now prove that White is winning between G7 and F7, and again after G6.

(In particular, G3 indeed was probably better ^_^.)]
;W[f7];B[g6];W[f4];B[a5];W[d6];B[resign])(;W[f4]
C[Eric\:

When trying to make a ladder escape from E3 against A3, I recommend connecting E3 _away_ from the edge rather than _towards_ the edge, to avoid what Black does next in the actual game (as opposed to this variation).]
(;B[c4];W[b4](;B[f7]
C[Eric\:

If Black ignores this, then whiteD2 connects.];W[d2];B[c3];
W[c2];B[b3];W[b1])(;B[d2];W[c5];B[d4]))(;B[b6]
C[Eric\:

If Black plays B6 anyway, then White either gets a ladder _from_ here or gets _almost_ as good of an escape.]
(;W[b4]C[White should play here to get a ladder.];B[d3];W[e2];B[d2];
W[d4];B[c4];W[c5];B[b5];W[c6])(;W[b5]
C[White should play here to get an escape.];B[c4];W[c5];B[d4]))))
