(;AP[HexGui:0.10.GIT]
C[2021/08/06

Black\: Frank
White\: Peter

White wins.
]FF[4]GM[11]PL[B]
SZ[11];B[a5];W[swap-pieces];B[h4];W[e7];B[i8];W[h6];B[g6];W[f8];B[g7];
W[g9](;B[g8]C[Maybe h8 is better, see next variations.];W[h5](;B[i4]
C[See next variation for when Black defends the bridge.];W[h7];B[g5];
W[f10];B[d8];W[e9];B[e10];W[f9];B[d7];W[c10];B[b10];W[c9];B[b9];W[c8];
B[b8];W[c7];B[b7];W[c6];B[b6];W[c5];B[b5];W[c4];B[b4];W[c2];B[c3];W[e2];
B[d3];W[e3];B[j7];W[h8];B[resign])(;B[g5];W[f10];B[j7];W[i3](;B[j2];
W[h8];B[i6];W[h7];B[j4];W[j3];B[i4];W[h3];B[f4];W[g2];B[e3];W[f1];B[d2];
W[d1];B[b2];W[c2];B[b3];W[c3];B[b4];W[c4];B[b5];W[c5];B[b6];W[c6];B[b7];
W[c8];B[a9];W[b10];B[c7];W[f5];B[c9];W[b9];B[d7];W[d8];B[e6];W[f6];
B[resign])(;B[g3];W[h3](;B[f4];W[h2];B[h8](;W[g2];B[f2];W[f3];B[d4];
W[e3];B[d3](;W[e2];B[c2];W[e4];B[d5];W[e5];B[d6];W[e6];B[c8];W[c9];B[d8]
;W[d9];B[e8];W[f7];B[e9];W[d11]
C[Eric\:

Now, Black wins even if it is White's turn again.  (B10 or F9)]
;B[f9])(;W[c2]
C[Eric\:


At least locally, this is strictly better.

(an escape for height-3 ladders, rather than at most an escape for height-2 ladders)]
;B[e2];W[f5]
C[Eric\:

It might even be win-vs-lose, since White can still try this.]
))(;W[f5]C[Eric\:

This looks good for White.]))(;B[f3];W[h8];B[i6];
W[h7];B[j4];W[h2];B[i4];W[g4];B[e5];W[f5];B[e6];W[f6];B[d7];W[d8];B[b9];
W[c8];B[b8];W[c7];B[b7];W[c6];B[b6];W[c5];B[b5];W[c4];B[b4];W[c2];B[c3];
W[e2];B[d3];W[g1]))(;B[h2]C[Eric\:  This wins.];W[h3];B[f4];W[h8];B[i6];
W[j6];B[i7];W[h7];B[j4];W[i4];B[k2])))(;B[h8];W[i9];B[h9]
C[In this variation, Black should tidy up at j8 first.


Eric\:

No.  That is _sometimes_ the case, but here and in general, if Black wants to tidy up this sort of corner, Black should push in first (H9) so that Black can do so with J7 instead of J8.  (ladder escape fork at J10)]
;W[g11];B[g10];W[f11];B[f10];W[e11];B[e10];W[d11];B[d10];W[c11];B[b10];
W[c10](;B[c9];W[d9];B[d7];W[e6];B[d6];W[e4];B[e5](;W[g3];B[i4];W[g4]
C[Eric\:

blackJ8 right now doesn't work, due to whiteH7, but](;B[f5];
W[g5];B[f6];W[h5];B[j5];W[i7];B[k6];W[j7]
C[This only works because of the untidy corner.];B[k7];W[j8];B[k8];
W[j10])(;B[j5]C[Eric\:

maybe this first works.]))(;W[f4];B[f5];W[h3];
B[i3];W[j1];B[j3];W[k1];B[d3];W[f2]))(;B[c8]
C[Eric\:


probably better

This threatens a switchback, which would connect due to White's weakness at E8.]
)))
