(;AP[HexGui:0.10.GIT]
C[2021/08/05

Black\: Frank
White\: Peter

Black wins.
]FF[4]GM[11]PL[B]
SZ[11];B[k5];W[swap-pieces];B[c9];W[d3];B[g5];W[f5];B[f3];W[i3];B[g4];
W[f7]
C[Eric\:

Although I feel that surely this isn't connected to the K-edge, I can't actually find any way to stop it from connecting there.

Peter\:

Yes, there is a large template here\: https\://www.mathstat.dal.ca/~selinger/templates/svg/template-6-xj.svg

Black's main intrusions are h6, in which case White g8 gets a 3rd row ladder with a very short A3 switchback, and g7, in which case White connects by Tom's move (or the tall version of Tom's move, which uses slightly less space).]
;B[g7];W[g6];B[i5];W[h5];B[i4];W[h4];B[k2];W[i2]C[Eric\: good];B[k1];
W[h6];B[i6]C[This looks like a good candidate for Tom's move for White.]
(;W[j7];B[j3];W[h8];B[h7];W[f9];B[f8]C[Mohex\: White is winning.];W[e9];
B[b9];W[e8];B[c5];W[d6];B[c7]
C[White has an easy win here at c6 via 2nd row ladder escape fork. See second variation on the next move.]
(;W[b8]
C[Instead, White is overconfident and plays something stupid!

Losing move. Black keeps the win.]
;B[d7];W[f4];B[b6];W[f2];B[e2];W[d4];B[c3];W[resign])(;W[c6];B[a7];W[b6]
;B[a6];W[b4];B[b5];W[e4])(;W[b4]
C[Eric\:

(or White can go here directly)]))(;W[i8]
C[Eric\:


Tom's move

G7 is black, but Tom's move _only_ needs G7,G8,G9 for a double-bridge from H9, so White's F7 means it still works.]
))
